I was supervising a new employee that broke a 5/8 tap on a $2500 stainless shaft. He asked me if I was going to fire him. I told him: think I'm stupid? Now you know how to break a tap, and you also learned what not to do to avoid breaking a tap; that is called experience. What do you think is going to happen if I hire a new guy with no experience?
@upward_onward3 жыл бұрын
Wise employer😁😁😁
@danielzunigagutierrez63003 жыл бұрын
@Neander Thal in part, you are correct. But probabilities to break a tap, lessen by about 70%. Remember: nothing Is absolute.
@iwaswrongabouteveryhthing3 жыл бұрын
Smart
@fz1000red3 жыл бұрын
That is the kind of reaction you see in a new employee who has worked for some shitty employers or supervisors in the past. He'll get over the past experiences after working under a boss that is more interested in facilitating the new troop's knowledge and training than throwing him under the bus for every screw up.
@robertthomas59063 жыл бұрын
I remember what happened when I did it. He said - why did I go and break it? I said - I didn't have anything better to do than to drill it out. That's exactly what I did for the next few hours.
@rob11133 жыл бұрын
I love the fact there’s a whole industry of tools that exist only to fix other broken tools mistakes
@aljosasinadinoski60323 жыл бұрын
Actually its used for machining parts, but it has other uses like this
@daleburrell62733 жыл бұрын
@@aljosasinadinoski6032 ...I can't see how THIS particular setup would be any good at actually MAKING anything- but if you are referring to the technique of "ElectroDischarge Machining", you're quite right.
@e.b75883 жыл бұрын
@@daleburrell6273 it can be uesed for making start holes in hardened steel for WireEDM
@MishkaBTS-kim3 жыл бұрын
P
@randytolle67063 жыл бұрын
My neighbor had a motorcycle with a broken dowel pin in the crankshaft. (Rotary valve Kawasaki.) A machine shop turned an EDM electrode to the exact diameter needed using a lathe and used EDM to cut the pin out to the depth shown on the print in the shop manual for the bike. The EDM cut it perfectly. This was about 1969.
@tonyfolsom14742 жыл бұрын
I haven't had lots of experiences with broken taps but I discovered something amazing during my first encounter. I broke a tap off in an aluminum supercharger. I called machine shop they refused to work on it. I researched and found out alum powder used to pickle veggies mixed with water and heated will dissolve ferrous metals like steel and iron but will not harm nonferrous metals like aluminum. I tried it and dissolved the tap completely for less than $10. Pretty interesting
@raymondzhao95572 жыл бұрын
interesting, I will try it in the future, thanks!
@mxnb_67302 жыл бұрын
Some1 like so i can come back to this some where in my life when i need it
@kaloosh26392 жыл бұрын
well done🌊
@POTGIETERDAVID2 жыл бұрын
That's pretty darn kwl
@doaSkid692 жыл бұрын
I won't lie I read this comment like whaaaat naaaaa Then searched it and wow that's a bloody brilliant way of doing it Lots of how too guides on KZbin to confirm what you say ! Makes me want to break a drill bit into some ally just to try it 😅🤷
@dewindoethdwl27982 жыл бұрын
My Grandfather was a toolmaker and had a set of taps that had a hole cored down the centre with a reverse thread. In the kit we’re these recovery tools, like a reverse thread bolt with a shoulder. You were to wind the recovery bit down into the central hole until the shoulder stopped it going any further. You then kept winding and the snapped part would back out. I think 1/4” was the smallest tap with a tiny recovery bit. He proudly boasted he’d won them as an apprentice, used them regularly and never blew a bit in 45yrs. Sometimes, seeing him work metals in his seventies it was wholly credible.😉
@fattyshtc2 жыл бұрын
That's the route I would of took personally.
@JohanDegraeveAanscharius2 жыл бұрын
That is exactly how it should be done, not smashing it into pieces. First a hole with the edm, the a reverse tap used to remove stuck broken bolts etc...
@coltraindontworryboutit99902 жыл бұрын
Obviously the two commenters have never worked in fab shops or machine shops. When a bit gets stuck like this in a solid steel part like this, you aren’t going to just reverse the tab and pull it on out. The steel will shrink and bind it up after it cools down. And other factors are at play as well
@JohanDegraeveAanscharius2 жыл бұрын
@@coltraindontworryboutit9990 It's M20: plenty place to edm a hole and use reverse tapped conical bit to unscrew it. The hole will shrink the tap's volume. Anyway, you are right that other factors play as well, but using a hammer and chisel are the last resort. He just was lucky not to damage the thread. This shows how you can make a hole in such hard metal using an Edm, but after the Edm, other tools exist. He had to use the Edm 3 times, normally you do this in 1 go with a recovery bit. Anyway,, the guy that breaks an M20 tap, was not using the right tool nor torque.
@rapidrrobert43332 жыл бұрын
@@coltraindontworryboutit9990 One of the most difficult problems we come across.
@Nobody-Nowhere-USA2 жыл бұрын
I so understand that sickening and sinking feeling you get when you break a tap off during one of the last operations of making an expensive part! So much easier to fix today then when I started working as a machinist!
@lukequigley1212 жыл бұрын
YES, In my days as in the deburring / finishing dept of a 40person shop w/ no edm they would always send the part to DEBURRING for me to get out and make like new..Retired now YEAH..
@Mustard0Tiger10 ай бұрын
The worst feeling is getting a tap out of an expensive jnconel part, then immediately breaking off a defective tap in the hole. Back to EDM for the next few hours…
@TomokosEnterprize9 ай бұрын
Yea but we are the few in the world that can extract them old school out in the bush.
@df710918 ай бұрын
I literally had just one tap left, measured that i need to go one milimeter deeper and that last bit made it break
@christopherleubner66334 ай бұрын
Now it's just more time on the part rather than scrapping it.Those edm burners are awsome, they will even burn out carbide taps.
@MajesticRecaps232 жыл бұрын
I am also a CNC-EDM machine operator in taiwan, and this is one of my masterpiece, I also can operate a surface grinding machine for it is very important to our job to prepare or shape an electrode used for the machining. Tapping or make a repair like that on the video are one of our job. I really missed it!
@jodygwiinn12339 ай бұрын
Hurco jurco made twain
@哟星星8 ай бұрын
来大陆cnc 放电🎉~大陆工厂多😅……你还可以去台湾公司当领导
@Croft_Customs3 жыл бұрын
This takes me back. I was everyone’s favourite apprentice because I saved everyone’s work by getting out all the broken taps.
@phuckyoutube59273 жыл бұрын
@Jun Cali getting them stuck?
@weldingbilgin3 жыл бұрын
👏
@TomokosEnterprize9 ай бұрын
You must be my twin at work, LOL.
@jodygwiinn12339 ай бұрын
Use helical tornado down use old junk carbidr tool grind relife shank and flood hell out of spin tool fast and helical down bout .001 at a time but helical dia of hole 5hen tap will blow out pick out rest watch when get towards end tap as let go will break tool and goug wall bit
@bigbob16993 жыл бұрын
Broken taps are why toolmakers and machinist drink .
@LordOfChaos.x3 жыл бұрын
Can confirm 😂
@DonnyDarko133 жыл бұрын
Man i Had that Broken Tap in a Roll of really hard castiron. It makes me sleepless 😴
@perceive81593 жыл бұрын
I wouldn’t know, I’ve never broken a tap😁😂
@LordOfChaos.x3 жыл бұрын
@@perceive8159 i am glad u didnt , hope it wont happen
@bigbob16993 жыл бұрын
@@perceive8159 1st yr apprentice or a form grinder ?
@heyitsme15342 жыл бұрын
I don’t use tap’s all the time but after 21 years of using them I can honestly say I have a love hate for them. As an electrician it’s very convenient to make your own hole when needed but sometimes I have to ask if it’s worth it because most of these taps are made like garbage. I had to tap a couple stainless cabinets before and every one day scepter the last I had an issue with. Now I let the young guys do it. When they mess up they give me that look but they know me. They know I’m not the one to freak out. I’m the one that makes them do the challenging work so they get experience and build confidence while applying their trade. And I never knew such a machine existed! Totally cool!
@beentheredonethatoriginals56733 жыл бұрын
The key to tapping stainless is more frequent reversing and backing out completely and removing all the debris. I learned to not use taps too many times on stainless, instead grab a new tap after 5 to 10 uses and move that used tap to your mild steel case. I still broke plenty in my line of work but always used another sharpened tap to remove the broken one. Saved a lot of time with these two practices.
@trillrifaxegrindor44112 жыл бұрын
if the tap has a shine or makes any noise,get it the hell out of the part....that "KINK" sound makes your asshole clench up😆
@KeithBair2 жыл бұрын
@@trillrifaxegrindor4411 I worked at a automation shop running a manual mill, building custom robotic machines and was one of 4 machinists there. I was always into the more tedious work and thinking outside of the box. I got stuck with setting up compound angles with a vise inside a vise and trickier stuff like that. The most puckering job I did was drilling and tapping mount holes in some 300 series stainless gripper jaws. The holes were m1.6x0.35, freaking tiny. The guy who ran the wire edm quit and I was the only one willing to take his place. Taught myself to run the edm and honestly had a blast doing that. Crazy what can be done with a edm
@TheDennisZb2 жыл бұрын
@@trillrifaxegrindor4411 that "oh f@ck" moment 😄
@aksourdough48902 жыл бұрын
I used to tap 4" bearing cap holes on an 18 ft forged and machined $500k crankshaft for 5000 hp diesel engine. Using radial drill press. Was paid about $8/hr (1979). Never broke a tap but was always nervous as hell. Bottoming tap out is very common way to break it.
@jasonw81242 жыл бұрын
Stainless is the damn devil
@curtis1333 жыл бұрын
if you spray on a zinc laiden epoxy paint over the work area the outflow passes ( just plug the hole with your finger) you won't have any ugly pitting on top, just wipe it off with thinner after. Just try it ;) takes 2 extra minutes to do and makes the result look perfect for the client! That aside nicely executed!
@williamoliver65503 жыл бұрын
It just looks such a bad way of removing it! All that chipping bits out with a hammer and punch, marking and levering against the threads is bad practice. Could've got 10 broken taps out in that time with some nickel rods and a few bolts to weld on 🤔
@jodygwiinn12339 ай бұрын
Use castrol tap wax and grind drill bit offcenter will open hole little larger help keep tap from blowing but only do with bigger size taps engineers say tap will pull and could risk life but 33 years never saw anything happen unless eyebolt was 80 years old and bent alwYs hide when osha come thru along with nylon straps only used for flipping parts over osha see snag and have scrap out why usa get n ass kicked by china
@JimP2262 жыл бұрын
This is about the most expensive and technical way you could possibly do this job. Especially with a 20mm tap. My go to for tap removal was always TIG welding. I would create a puddle of metal as wide as I could make it without contacting the threads. Then keep building and building until I had nub protruding from the hole about 15mm. When done welding I would lube the hole with penetrating oil. Then grab the nub with a pipe wrench and back the tap out. Depending on the size of the tap, it would usually take about 10min start to finish. Worst case, it would break off again and I would have another go. Removed hundreds of broken bolts and taps this way. Very effective.
@keatmany2k52 жыл бұрын
Can't weld to a tungsten carbide tap tho, hence why we use tungsten electrodes
@mikeydudek288510 ай бұрын
@@keatmany2k5I was wondering why you were going down the overkill route. At first I thought it was just for demonstration purposes, but I never considered that they were tungsten carbide taps, no wonder it broke.
@bryantburns366410 ай бұрын
@mikeydudek2885 the tap in this video was not a tungsten carbide tap. It was a hss tap. The guy that posted that comment is a dumb fuck. Tig welding method is great
@ИгорьЛюбарский-ж2ь7 ай бұрын
@@Yeakerr а я просто высверлил его простой дрелью и сверлом по кафелю. рассверлил середину а половинки так достал
@GRINGOX-gk2sy6 ай бұрын
Sure, this is a good idea and doesn't take time or effort, and there is another way that he could make a hole in the centre of the tap, then put a squared or reverse threads tap to take it off and unscrew the broken tap, it's so simple .
@dayofmone3 жыл бұрын
You could try applying adhesive plastic tape around the area, it should prevent the surrounding metal from being damaged by the process? That's how electric etching is done, you apply an adhesive plastic tape with cutouts in the shape of the etched mark.
@СергейБ-ф7и3 жыл бұрын
Try nail polish. 👍
@Mike-ff7ib3 жыл бұрын
Kapton tape is perfect. Its rated at 500deg F and would perfectly mask the area and the adhesive would not leave any gummy residue. It peels off perfectly.
@plusoem3 жыл бұрын
@@Mike-ff7ib knapton tape is amazing stuff
@curtis1333 жыл бұрын
I personally use zinc epoxy paint , it's tough to damage , slightly conductive but comes off with solvent later leaving no trace , tape sorta works but in a shop environment occasionally gets a crease or a bubble or a pocket under it and then the spot still gets damaged after so I tried various paints and epoxy paint meant for painting iron after welding or galvanized steel etc ended up working like it was made for the task
@bsimpson62043 жыл бұрын
The top of that part is a mess, it certainly wanted protecting by something, kapton tape sounds a good try for starters. I like the copper tube idea too to slice through the webs of the tap, that would be beautiful to see.
@andyjohnson37902 жыл бұрын
I love that this super detailed and expensive looking machine for the fix is also brought with what looks like a sweet old hand me down wooden handle hammer.
@jamesdewer2 жыл бұрын
Removing busted anything is an art as much as science. I learned many techniques while in the Navy. On an all steel ship. It made me an indispensable shop hand. Absolutely vital skill.
@wesleywright58253 жыл бұрын
This is the first time I’ve seen one of these at work. When we break taps, we usually use carbide end mills at high rpms and a very slow speed rate. The bit a little smaller than the drill used for the minor diameter of the tap. Normally with the part left in the fixture or the vise. If you have a part this size already out of the machine or fixture it was in. I could easily see where this equipment would come in handy.
@trillrifaxegrindor44112 жыл бұрын
i often use a ball nose and not very high rpm,under a 1000 rpm
@moritzedelmann6102 жыл бұрын
We do it the same way, using carbide endmills to remove broken tabs but i could see this come in handy in removing a broken carbid tap.
@fall221232 жыл бұрын
Same. In my last job, we had sinker EDMs, and fast hole machines. But to have them burn out a tap, there was paperwork to fill out, they could never get to it right away...management wanted to know why you broke a tap...removing them by plunging an endmill through them became my go-to method.
@JakePlisskin122 жыл бұрын
@Jesus is LORD stop trying to force religion on everyone. People have to find their own way. Either way Jesus was a con man who masterminded the greatest con of all time. It's hard to believe in something where the people running it keep asking for your money. Besides if you want to belive in a religion probably more feasible that one should believe in the first one. Hinduism.
@peternicholsonu60902 жыл бұрын
@Jesus is LORD Your comment dishonours our Lord because it does not relate to the story. Jesus always preached to teach lessons that needed to be learned by those there. Your outburst pleases you and your enthusiasm but upsets those who do not understand your faith. What you have done is thrown pearls of truth into the mud to be crushed by animals who do not appreciate their value. Keep your pearls and only show them to those who recognise their true value. Don’t burst forth. Stop, think, and seek out those who are seeking truth. Otherwise you dishonour our Lords pearls.
@cr125kid13 жыл бұрын
This has got to be the most interesting extraction process I've seen! Thank you!
@efotube46797 ай бұрын
10:16 isn't it possible to avoid pitting corrosion around the hole, by just applying a masking tape or some sort of wax before the procedure?
@georglimiux6773 жыл бұрын
Cool little EDM machine. Could almost smell the burning oil even after nearly 40 years of being away from them.
@thebigdustin3 жыл бұрын
That sounds like a very angry Geiger counter.
@Potrvlb2 жыл бұрын
Amazing. Simply blows my mind that men think about these tools in their heads and draw up plans then create them, build them. Fascinating and really fun to watch them in action.
@Stefan_Van_pellicom5 ай бұрын
Strange thing : women never do that. But since they don’t seem to need men anymore, I wonder how they get their broken taps out … 🤔
@Potrvlb5 ай бұрын
@@Stefan_Van_pellicom amen 🙏
@ColKorn19653 жыл бұрын
Any machinery that has a claw hammer in the tool kit is bound to be good
@Bassist58583 жыл бұрын
old school wood
@Rhythm24inch3 жыл бұрын
Who has a claw hammer in an engineering tool box, obviously proper technical work this
@DIYToPen3 жыл бұрын
Ah yes, the man with the machine, that does the thing.
@Peter_Riis_DK6 ай бұрын
I don't know if I'd be entirely satisfied seeing that pitted triangle around the threaded hole in my brand new space capsule.
@bryantburns36646 ай бұрын
Right. Buncha hacks
@alpineendeavor99086 ай бұрын
Could have shielded the surface with sheet aluminum and .75 hole dia in sheet.
@chipsammich20785 ай бұрын
RTV it lol
@danielsanichiban3 ай бұрын
You won’t get a job at Boeing with that attitude mate
@rogueninja16853 ай бұрын
How did that happen? Is it the water base medium?
@ReiniGrauer3 жыл бұрын
I've gotten some smaller broken taps out on my milling machine, with the part still in the fixture. I took an old, worn center cutting carbide end mill with about the same diameter as the minor diameter of the threads and ran a drill cycle, extremely slow feed rate (like .0001" per rev or something like that), down into the tap with lots of coolant. Basically ground it down with the end mill. It turns the tap into dust and the end mill still looks basically the same afterwards.
@knockout14763 жыл бұрын
I usually use a small broken carbide endmill I grind a special point to drill out broken taps. I take out broken taps all the time from other machine shops.
@ellisosmond63883 жыл бұрын
Yes it works great done it many times
@iknowyourebrokeauto4683 жыл бұрын
Did same thing in a drill press
@thelastgearbender11583 жыл бұрын
When I break a tap I beat my wife and turn to alcoholism ,also curse the universe for my existence. It's not standard engineering practice but it's alternative engineering practice.
@GeneralChangFromDanang2 жыл бұрын
@@thelastgearbender1158 This is the way
@marcusaguirre70323 жыл бұрын
We had an edm collecting dust no one wanted to "figure" it out. So I took the initiative. These things are worth their weight in gold. Holy smokes I can't even tell you how many parts I fixed over the years. Every shop should have one imo.
@Febloop3 жыл бұрын
Also a tool room.
@SarahandJim13 жыл бұрын
What is a tab? Also, twice the depth to the diameter of the "tap"
@williammccafferty85583 жыл бұрын
Edm I'd the thing you name it lol it can do it edm machining is still the top dog to hard materials wire eroding machines make taps lol dies all sorts yep it's an art form new a guy from wetland helicopters he used to run one total respect
@PhrozenCPU2 жыл бұрын
@@SarahandJim1 I kept noticing too. It is poorly transcribed... tab =tap
@ipick4fun272 жыл бұрын
It’s useful more than just fixing tools. Imagine drilling holes on harden parts. I have suppliers plugged the holes all day long. Makes some tough job much easier with the right tool.
@fullcirclerepair26552 жыл бұрын
As a retired Aerospace prototype Machinist, nice job I love the portable EDM
@andrewmawson68973 жыл бұрын
When I'm EDM'ing broken taps I use a thin wall copper or brass tube as an electrode of a suitable diameter that it can cut all the webs at once. No chiselling necessary !
@theoldbigmoose3 жыл бұрын
Plus get the dielectric/electrolyte right to the bottom to flush the crud out of a deep hole
@palleppalsson3 жыл бұрын
Brilliant
@SmilingDevil3 жыл бұрын
That thought crossed my mind, Why use a solid Rod, if all You want is a thin Cut to make manageable pieces… and pumping it through the rod to flush the gap is a total bonus… hell you could vacuum pump it back through the rod when applying it to the outside, probably even making less of a mess…
@stephenc41613 жыл бұрын
TAP
@larryrestainer99493 жыл бұрын
Lots of suggestions...use magnetic scribe or probe , small air nozzle to get to bottom if possible, electrode of tubing vs solid. As tool and die maker of 43 years, burned vent holes in hardened forging dies as small as .5 mm with rotating electrodes......very interesting.
@charlesdavis24063 жыл бұрын
I have been removing broken taps for 40 years without damage to the part. One employer bought an EDM machine before I came to work for them. After I showed them how to do it they sold the EDM machine. All you need is technique and about $400 in tools. Happy to teach anyone how it's done.
@charlesdavis24063 жыл бұрын
I never use a power to to remove the broken tap it's to time consuming to set up the X Y and Or X it only take about 1/2 hour to remove a tap as small as 3/8" up to 1" no matter what material it's in.
@fuzzfacelogic7899 ай бұрын
I actually managed to do it twice using the tappy, tap, tap process.
@mycovore9 ай бұрын
Tell us your secrets
@ronnymcfarland77759 ай бұрын
You’re an old pro!
@fredfred40868 ай бұрын
Make a video, put it on KZbin, earn money from it.👍
@TomokosEnterprize9 ай бұрын
I was the one they called for troubles like this. No fancy equip, just me and a lot of experience to bail them out. This likely took the same amount of time and resorses a torch, hand drill and purpose ground chisels to do the same job but WAY cheaper/less expensive $
@robinhedlundkarlsson51842 ай бұрын
Same, when you break alot of stuff you have to learn how to fix it 😂
@TomokosEnterprize2 ай бұрын
@@robinhedlundkarlsson5184 My dad taught me the difference between pro's and rookies is the pro's can fix their mistakes, LOL.
@robinhedlundkarlsson51842 ай бұрын
@@TomokosEnterprize sounds like we have the same dad :)
@TomokosEnterprize2 ай бұрын
@@robinhedlundkarlsson5184 A couple lucky fellas for sure EH !
@ArifKamaruzaman3 жыл бұрын
I'd tape the metal. The finishing looks weird and probably etched. Adding extra works.
@augustrush24493 жыл бұрын
súper inteligente!
@alakani3 жыл бұрын
I would use stick welder and/or vice grips with nicer looking results. How do people afford these toys
@joelayoub27743 жыл бұрын
Im guessing they didn't care about the surface and the taps were used for moving the tool
@williamwixon3 жыл бұрын
That’s a beautiful thing! A human defeating a formidable foe! Congratulations! Victory!
@aquarius99092 жыл бұрын
Another great video. Keep it up. Protecting the area around the hole with non-conductive layer of material e.g. some kapton tape with silicone adhesive, could preserve the initial surface quality and eliminate the cleaning of discharge marks ?
@TEFox2 жыл бұрын
I wonder what diaelectric fluid he was using, and whether a change would eliminate those surface marks. Oil instead?
@Bizzon6662 жыл бұрын
@@TEFox It probably is oil, sinker EDMs use it in most cases.
@TonyTheKiwi622 жыл бұрын
he should do something - those marks were deep
@tootalldan57023 жыл бұрын
I'm surprised that you didn't use plumbers putty as a well around the hole and prefill with the liquid. Wouldn't that prevent some surface staining?
@sonnguyen-he3nf3 жыл бұрын
the water is used to extract the dust from the tap got discharged not only for cooling tho
@Jefflove793 жыл бұрын
I always just used single flute carbide drill bits to get out broken taps.
@jstengineering15133 жыл бұрын
But obviously you can't charge a fortune like this guy, if you do it simple lol
@thebrowns53373 жыл бұрын
Was about to ask why the hell is he doing it like this...€£¥ of course!
@Jefflove793 жыл бұрын
@@jstengineering1513 very true! 😁
@sstorholm3 жыл бұрын
The difference is this, if you do it yourself and wreck the part, no biggie. If you’re called in to remove the tap without wrecking the part, you use EDM to make absolutely sure you don’t wreck the part, as if you do, you’re quickly approaching a reality where you don’t eat. This is why professionals are so expensive, a big part of the price is the fact that the pro is absorbing the risk, aka. the guarantee that they’ll fix the problem within a timely manner, not the work itself.
@Jefflove793 жыл бұрын
@@sstorholm i’ve never wrecked a part with a carbide drill bit, that’s why you use a carbide drill bit.
@Timedelayedfuse9 ай бұрын
I just learned what EDM machining is. Fascinating stuff!
@luke-thurston3 жыл бұрын
its always the last hole in an expensive part, that is super urgent, in aluminium tooling plate. found a new use for out galvo laser marker, great to be used as a tap edm, if you remove the laser shroud and manage to get the plate under the lens. Does the trick lovely without any heat to the ally.
@maxsolo26523 жыл бұрын
I was just thinking about using “freakin’ lasers”
@markwhelan16523 жыл бұрын
Aluminum tooling plate? Tap remover tool with prongs, dry ice, a MAP gas torch and some 3 in 1. That aluminum will grow a lot. Probably enough to loosen the jam especially if you can drop a couple small chunks of dry ice in the hole.
@maxsolo26523 жыл бұрын
Mark Whelan Or just drill the holes with freakn’ lasers
@markwhelan16523 жыл бұрын
@@maxsolo2652 easier said than done. No lasers in the shop 30 years ago either.
@OtakuSanel3 жыл бұрын
why not mask off the part with some tape to the perfect hole size to avoid pitting the surface like that?
@drlegendre3 жыл бұрын
Good question. There may be a suitable tape for that purpose, just call the 3M rep and find out. But if not, you'd think that a selection of various sized hole masks would be useful. Then again, there may be more to it than meets the eye.
@nexxusty3 жыл бұрын
@Vladimir Putin LOL. Using the right type helps... Kapton tape. Extremely temperature resistant.
@OtakuSanel3 жыл бұрын
@@MatthewMelson I know the surface rust is easily removed but that's not what i was referring to. 9:20 you can clearly see it's been buffed and the surface finish is still very bad and looks like it's pitted pretty deep. Funnily enough I've actually worked on an EDM for a year at my old job so i know giving it a good sand blast will make it look nice too but that looks like severe pitting. It also seems like an issue easily mitigated by covering the surface with a varnish or tape.
@felixcat93182 жыл бұрын
As a mere independent motorcycle mechanic, its interesting to see that engineers in far loftier establishments than mine have succumbed to the dreaded broken tap in the workpiece! Nice to see a professional at work making it good again. There will always be broken taps, hence the need to always be able to extract them.
@Spongebob09113 жыл бұрын
Nice job. I learned that taps that break off while cutting (turning in for right thread) are harder to remove than those turned back to break the chip. My boss told me that that was the first question you had to ask when someone broke the tap. Taps with a bigger inner diameter we drilled a hole in the center to put in an extractor tool, trying to pull it out in its whole. If that didnt work we often referred to what you just did. Breaking off the tap bits could damage the inner thread though.
@salimanangadi50213 жыл бұрын
Hello , if you use square type electrode, you could get easily because you can use a square type shaft then remove them..
@apsdev3 жыл бұрын
i tought when he was making the 2nd hole that he was making a slot to stick something in like a screwdriver. Maybe use 2 thinner electrodes and make the holes off centre so you can insert a tool to make the tap turn .. cant they make the tap so its entirely square .. not just the tip heh.
@charlescoleman81393 жыл бұрын
@@apsdev step the electrode up to a few thousandths smaller than the minor diameter of the threads and it would be cleaned out in one pass. It would take a little more setup time but overall would be quicker.
@JaspreetSingh-fo2qe3 жыл бұрын
@@charlescoleman8139 I guess it would damage the threads that way. Note the damage on the face.
@Dont_Gnaw_on_the_Kitty_13 жыл бұрын
@@charlescoleman8139 Maybe set the diameter of the electrode to the web size of the tap.
@stevecleaver89336 ай бұрын
OMG What a palaver !! We used to simply grip the broken tap using the flutes with a pair of snipe nosed pliers, clamp them tight & then UNSCREW THE TAP from the hole !!!
@donlarocque51575 ай бұрын
It's a spiral tap.
@stevecleaver89335 ай бұрын
@@donlarocque5157 Irrelevant, it still has flutes which can be gripped to remove the tap, it's just harder as the amount you can grip is (obviously) far less than on a hand tap or a spiral point tap, but the same methodology that I stated before can still be used.
@christopherleubner66334 ай бұрын
Yup that's the first try. Then add oil and heat till it smokes than try again. If that fails then get the burner. 😂
@markedwards19003 ай бұрын
@@donlarocque5157you can even use scissors on a spiral to twist it out this is drama
@bret_Lambky3 жыл бұрын
I have to wonder how well a thread gauge goes into it! The bolt fits, but a go / nogo is the true test. EDM machines are very cool. Being a tool and die guy, I have my own bag of foolproof tricks… !
@Bob_Adkins2 жыл бұрын
I've had pretty good luck with a left hand carbide spade drill if the broken tap has a flat place big enough to start it.
@lunchboxproductions11833 жыл бұрын
Have you ever tried clay as a way to protect around the hole and create a dam to funnel the used coolant away?
@lachlan19712 жыл бұрын
I thought you were welding a rod on to the broken bit to unscrew it, then you put lemon juice in and it got too complicated for me.
@atr12122 ай бұрын
Same thought 😂
@Silky_boi3 жыл бұрын
This was such an interesting video, I never knew of such a trade. Excellent and clean work!
@jimurrata67853 жыл бұрын
It's a good thing the mag base works on that material. Great save! 👍
@peterfitzpatrick70323 жыл бұрын
It wouldn't be a big deal to clamp a steel plate onto the workpiece.... there are even holes tapped in it !! 🙄😂
@MayanMercernary2 жыл бұрын
Wow! Dude. I didn't expect to actually stop whatever else I'm doing and just watch. Oddly satisfying.
@OldishGoalie3 жыл бұрын
Circle mill the center of the broken tap with a relief cutter (leaving the flutes to be cut free). It's much faster then edm. Also, if you chamfer your holes before tapping you have a better chance of having a tap run true... not sure if going in crooked was the cause of the break.
@hellbounddeciple3 жыл бұрын
skip the circle mill. Use a ball endmill down the center.
@OldishGoalie3 жыл бұрын
@@hellbounddeciple have you done this?? From my experience a ball endmill wouldn't make it, as the center of the tool moves the slowest... plunge cutting with that seems like a very bad idea. But I've never done it that way. I should have also said, I used to use a beat up 1/2" .125R relief cutter for this kind of thing, not a new tool.
@littlejackalo53262 жыл бұрын
@@OldishGoalie Sure, if you have a CNC machine to fit it. Or if you have a manual machine to fit it, you can just use a center cutting endmill to cut it out. (Not sure why I've seen several people saying to use a ball end mill. A regular flat bottom carbide endmill works fine.) If you don't have a machine to fit it into, if it's not a carbide tap, and if you want to risk busting your endmill when the tap, or pieces of the tap, break free. There are several reasons why this method is used, mainly the fact that the tap moves while milling and you'll keep breaking endmills.
@trillrifaxegrindor44112 жыл бұрын
@@OldishGoalie yes,ball nose endmill and lots of air,using the lowest feed and LISTENING
@shug8313 жыл бұрын
Had that job numerous times in the past but we could machine up different sized electrodes to suit the hole. Found copper pipe good because it could cut through all the tap webs at one go and it quickly because you were only cutting the thickness of the pipe wall.
@sanches23 жыл бұрын
That is clever!
@brahtrumpwonbigly73093 жыл бұрын
That's an awesome idea
@krishnamurthynrk68423 жыл бұрын
Where this machine is avaliable I need to buy
@mosler3022 жыл бұрын
I've removed quite a few broken taps in my day but not that way. As other commenters stated, a carbide end mill, or in my case a carbide drill or diamond core bit. Don't go all the way through, just go deep enough so a broken screw extractor can jam in there & spin it out. If that doesn't work, drill all the way through it & chip the tap flutes with a punch. Doesn't take long.
@shutdowndll61403 жыл бұрын
In my old workplace we used to precut the thread just enough so that we can later finish it by hand. Usually with a part that runs for half an hour, you got enough time to do it.
@slidey17883 жыл бұрын
I'll often do similar, threadmill to rough out and hand tap afterwards to finish. More effective that pissing about getting the threadmill running nice for only one or 2 holes.
@mizarstifmeister72983 жыл бұрын
-Use tabs to remove foreign substances from the threads *breaks tap again*
@brahtrumpwonbigly73093 жыл бұрын
Thanks for the nightmare fuel. The only thing worse than a broken tap is work hardened holes!
@closeenoughmicron3 жыл бұрын
He shouldve used a pick and a magnifying glass, thats what i used to do before running the tap in the thread.
@edastro77073 жыл бұрын
No one will ever know a machinist's anguish when the tap breaks on the last hole of the last part and you have to mill it out. I nearly walked out after breaking a 1/4-20 tap on a stainless steel part. The boss ordered thread Mills the next day. Lol
@inconel71853 жыл бұрын
Thread mills are very nice, if it breaks you just pull it out, we always use them in difficult materials
@LordOfChaos.x3 жыл бұрын
@@inconel7185 thread mills are ussually more cost effective They are expensive but they hold 10 times longer than conventional tools We only use them since 2016
@geminisduerme52663 жыл бұрын
I am inexperienced compared to my coworkers but I saw they kept breaking their taps in hard steel and recommended a thread mill ...I earned a little respect after that
@LordOfChaos.x3 жыл бұрын
@@geminisduerme5266 thread mills are overall better and more cost effective For example we had go make 600 parts which each had 6×M5 taps Conventional taps broke after 50-60 parts And thread mills held for 450 parts till we completed the contract and i think it would have held even longer The thread mill was 120 euros And the amount of taps we broke with the Conventional ones took us around 280 euros So idk I would never go back from thread mills
@stefanhauser28043 жыл бұрын
@@LordOfChaos.x where can you get a thread mill for 120€?
@niczoom3 жыл бұрын
Great work! I learnt something new today and have now read up a bit on EDM machines, thanks for the video.
@danielhaupt20662 жыл бұрын
Just as a question, would masking tape or even just tape help protect the top surface from being damaged and last through the process?
@p00lking2 жыл бұрын
It’ll burn through
@bradhaines31422 жыл бұрын
just hone it and its fine. not worth wasting tape
@danielhaupt20662 жыл бұрын
@@p00lking it's wet though...
@Dexter_Solid3 жыл бұрын
Im guessing you at lease tried to spin it back out with pliers or something. I use taps often but i was never put in a scenario where i couldnt extract it with hand tools.
@elmo67yt3 жыл бұрын
There probably is too much tension on the tap due to machining
@peraskeladden64993 жыл бұрын
When machining stainless, taps often break on the way out. And that makes them almost impossible to get out without crushing parts of them first. Especially inconel 718 is a bitch to tap, or remove broken taps from😅
@markwhelan16523 жыл бұрын
Walton makes tap removal tools that work very well.
@danfarris1353 жыл бұрын
That’s a nice big tap. I probably would have drilled it out with one of my personal home made carbide drills on the large milling machine here. My last resort would be to send to the EDM guy here. I wouldn’t mind having this portable hole popper around though. It definitely would come in handy once in a while.
@bobbygetsbanned60492 жыл бұрын
Doesn't even need special tools, just a carbide endmill slightly smaller than the hole would do the trick.
@BasementShopGuy6 ай бұрын
Really cool! Curious if you can discharge a tap and not have the lumpy affected surrounding metal? Or is that always the end result of the process?
@VirginiaWolf882 жыл бұрын
That was neat. I've never seen electricity used to weaken metal like that. Thank you for sharing James Park
@jodygwiinn12339 ай бұрын
Spark erosion can set electricity higher use rough electrode then finish trode better turn elec down will undercut if not
@eviethekiwi71783 жыл бұрын
I’m surprised that part is only $5000 haha
@danielzunigagutierrez63003 жыл бұрын
I know. The material itself.
@beny71603 жыл бұрын
Not wrong. Just the material here in Aus would set you back that much.
@GoxMM3 жыл бұрын
im surprised it actualy is 5000 , my company would make it for legit 200-500
@indydominator11803 жыл бұрын
@@GoxMM unless your company makes it out of paper you can’t get a part like that out of aluminum for that cheap
@tiagolomar3 жыл бұрын
5000€ part??? Made in China right?😂😂😂
@peterharrell73058 ай бұрын
This reminds me of my first week in auto shop class. I crossed battery terminals and fried an alternator. My sho teacher said "Great. Now you get to go learn how to rebuild an alternator." I spent 2 days off site at a shop with a friend of his. It was awesome.
@backho122 жыл бұрын
The key to not breaking a tap is to stop 1/2 turn just before it breaks.
@brettloo75882 ай бұрын
lol
@CrowPal2 ай бұрын
And back off frequently.
@greggminkoff67332 жыл бұрын
Breaking taps is a common occurrence when using 4-40 and 5-40 taps in air hardening tool steel like A2 , M2 and P2. We had a very large 100 gallon tank filled with oil. We would submerge the part along with the electrode and burn out the tap with an EDM machine. Worked every time. 👍👍👍👍👍👍👍
@f.d.66672 жыл бұрын
Haha ... EDM machine was my first thought when I saw the video thumbnail!
@ivanhorban3408 ай бұрын
Use clear nail polish to protect the area around the hole from etching. Nitric acid removes broken taps from Aluminum and does not attack the AL. We used to Nitric acid and build a small clay dam around the hole to hold the acid at Carmet Company.
@Denvermorgan20003 жыл бұрын
A peace of tape around the hole might help prevent pitting around it just a thought.
@LSXperts723 жыл бұрын
Who cares
@neilkurzman49073 жыл бұрын
@@LSXperts72 Depends on what the surface is used for.
@m.b.38403 жыл бұрын
@@LSXperts72 the customer
@Denvermorgan20003 жыл бұрын
@@LSXperts72 I do it might not matter to you but the customer might care too.
@MindOfAncient3 жыл бұрын
A piece of tape wouldn't prevent the scorching of the metal in high temperatures such as those produced in electrical welding. The electricity and accompanying heat generated within the arc is necessary to weaken the structural integrity of the tap so that it may be removed.
@byronlovesdrifting13 жыл бұрын
Never heard or seen this process before very interesting
@jay715123 жыл бұрын
Yeah same! I've also spent many hours drilling and hammering out broken taps lol.
@c0rr4nh0rn3 жыл бұрын
EDM is very good for high aspect ratio and fine holes. .1 millimeter holes through a 50 mm piece of metal? No problem. I was surprised at how large this electrode is though.
@Electricz03 жыл бұрын
If you want to learn more, check out this video by Applied Science. It explains the process very thoroughly: kzbin.info/www/bejne/qKGrinWwbLmif6s
@TheKern-ahl2 жыл бұрын
Hi relatively new to machining couldn't you weld a bit of stock to that tap and use a some type of wrench and slowly un-tread the tap or when it breaks is it usually friction welded to the inside?
@martinbooyzen15622 жыл бұрын
Note the dark region around having a rough finish(still visible after being polished, almost looks corroded). Does that fatigue the metal in any way or is it a thin surface
@brooklynperson5902 жыл бұрын
I'm also curious
@benfegan54143 жыл бұрын
Couldn’t you use a larger (O/D) bronze rod to eat through the core of the tap? This would allow the threaded flutes to be tapped away with a home made chisel from the thread and remove them. At my last machine shop I was the only one that would work the EDM and I still have my collection of special chisels and pliers. Good job, keep up the good work.
@DavidBlair-q1d9 ай бұрын
Yes, a larger electrode works much better. It removes the “core” of the broken tap allowing use of a dental pick to remove remaining material from the threads .
@wwsjr28 ай бұрын
Amazing! The EDM I ran back in the day was the size of a small car.
@robster15563 жыл бұрын
As someone with no experience in those big projects... Genuine question: Couldn't they just take a "claw/ thong" to pinch it between and screw it out? Or weld onto it and screw it out?
@guitarwizzz3 жыл бұрын
There are tools like that but they don't always work. My dad was a machinist for most of his life and he still has a couple of those claw type extractors.
@Screwdriversteve13 жыл бұрын
The reason the tab broke in the first place is because it became jammed in the piece. Simply backing it out is not that easy because it is jammed in there pretty good as well as when the part cools it shrinks on to the tap making it a permanent fixture
@x2malandy3 жыл бұрын
@@Screwdriversteve1 You are right.
@mikeh35593 жыл бұрын
Spend 10k dollars to prevent a 5k dollar precission catastrophe. When done hit it with the grinder.
@DanPetrePhotos3 жыл бұрын
I doubt it costs 10k to spark it out. Money not the priority when you have a deadline and you want to keep the cutomer
@markwhelan16523 жыл бұрын
@@DanPetrePhotos MONEY IS ALWAYS THE PRIORITY!!! LOL If you buy this type of machine, the price goes down every time you use it. Obviously, its probably not the first choice out in the field on a pipeline or aircraft engine, but its a nice tool to have in the shop. I removed thousands of broken bolts and tap s and never saw this way before, but its pretty cool.
@markwhelan16523 жыл бұрын
I mjust looked online and you can buy an EDM machine for a little over $1,000.
@pauljanssen759410 күн бұрын
The best way to take an easy out or broken table, used cheap concrete drills and keep researching them and take your time
@itsverygreen5323 жыл бұрын
You can avoid the damage to the top surface by protecting it with wax or sticky tape.
@dannyo33172 жыл бұрын
It gets it out for sure, but I was surprised that it still "does a number" on the metal surrounding the hole. The best results are obtained by not breaking the tap in the first place! Sometimes accidents just happen no matter the care taken.
@ciberiada012 жыл бұрын
Exactly! Now he has to resurface all the ring's top side. I don't think the client (or his supervisor) will like the area around the hole. If only he could put a tape on it, it would be better, I think.
@Backyardmech12 жыл бұрын
I would’ve been at that for an hour or two with an air hose and a punch, trying to back that out. I’m glad there’s an industry in tools to help fix these mess ups. Happens to everyone at least once in the machining industry. Just fess up to your mess up and ask for help. Stuff happens.
@kalebbooher80923 жыл бұрын
I was onboard, and then the grinder on the machined surface threw me off😭
@RageXBlade3 жыл бұрын
Yeah I would have stoned it down, of course I don't know the flatness or any of the other tolerances so 🤷♂️
@keithland8253 жыл бұрын
Scotch Brite pad
@DamonBMW3 жыл бұрын
All the youtube mechanics are at it again I see
@matthewfrost36773 жыл бұрын
The real question is why someone familiar with this method would not mask It off to begin with. It would have taken less time than grinding or stoning and wouldn't have left a pitted surface
@ctdieselnut3 жыл бұрын
That wasn't a grinding wheel. Looks like a scotch brite type of material. Notice no sparks, and it did nothing to the light pitting around the hole.
@chrisyoung97913 жыл бұрын
$5000 dollar part and you are going to tap! Crazy! Use a threadmill!!!
@Bloodbound893 жыл бұрын
even then.. could be a defect in the tap structure like mine .. i broke m45 by hand ..
@D3nn1s3 жыл бұрын
Pretty sure they originally did. And just for recutting the last time its perfectly fine to do that by hand. With a mill theres no way youd get the thread started in the same position anyways.
@dalesmth13 жыл бұрын
@@D3nn1s A threadmilled part won’t break a tap. A chase tap is used only to de-burr the minor diameter.
@D3nn1s3 жыл бұрын
@@dalesmth1 it can still happen whenthe tap is dull or there was a chip in the hole. Maybe programmingerror, maybe the tap wasnt cooled properly. There are so many things that can go wrong on a mill as well, we dont know what happened.
@dalesmth13 жыл бұрын
@@D3nn1s A chase tap is post milling. Usually done by QA/QC (in smaller shops).
@bulletproofpepper22 жыл бұрын
I have seen this done on a job sites hardened bolt and carbide drill was broke trying to drill it out. The EDM was a different design or manufacturer but portable, the technician use a type of wide vinyl tape and plumbers putty to protect the surface. I was his assigned helper and learned a ton cool tricks. He made three over lapping holes, pulled the core out and the broken carbide drill, made three sided key shaft, and pour in liquid butane, installed the three keyed shaft and turned the shaft with two pipe wrenches.
@johnbrewer17682 жыл бұрын
That was so awesome!!! I've never seen or heard of that process before. Unbelievable!!!
@Skrillfreak3 жыл бұрын
8:00 that is exactly what a carbide burr is used for
@chetmcmasterson3 жыл бұрын
I thought I was going crazy, lol
@Dhagen62783 жыл бұрын
Yeah no offense to this guy running the EDM machine, but besides running that equipment he seems really sloppy/unprepared or maybe just inexperienced. Use the right tool for the job...
@anomicxtreme3 жыл бұрын
That's what I thought.... That was totally overkill to remove a broken tap. (tab? Lmao) We do this a lot on aluminum racing blocks and have never seen anything like that before. That's like using a plasma cutter to cut a pilot hole in a piece of wood....
@JohnIsett3 жыл бұрын
The use of a carpenter’s hammer was.a clue we’re not dealing with a master machinist. Sorry, but this looks like heck. I can only imagine the threads were equally corroded and likely molecularly compromised. Thumbs down.
@antonmaier22633 жыл бұрын
@@anomicxtreme nitric acid is an elegant solution too
@boydovens418010 ай бұрын
Great video nice equipment , but unfortunately most of us do not have access to such technology, and have to make use of what you have to hand . Thats when the creative juices get stimulated .
@davecowell51833 жыл бұрын
I used to operate ecd and ecm machines so this video was really interesting to watch as I couldn't see this process while the machine doors were shut
@iaincowell97472 жыл бұрын
What are the fucking odds! 😆
@Th4thWiseman2 жыл бұрын
I've done this 100's of times for multiple customers on both small and large taps without the need of an EDM, my best advice is GET SOME DECENT PUNCHES for starters and patience is the key to successful extraction!
@nabman5619Ай бұрын
I am curious, why didn't you reverse it out? Were you afraid that if there is a cut piece stuck somewhere could damage the threads? I usually rock forward and backward 10 degrees until it starts to move again and reverse it out to remove fallen chunks inside the hole then I clean oil and repeat.
@jimsvideos72013 жыл бұрын
Nice job! That EDM machine is a lifesaver!
@thomass64343 жыл бұрын
Electronic Dance Music Machine! Yea!
@thomasmore2603 жыл бұрын
M20 is also easily removed with a cheap plasma cutter.
@thomasmore2603 жыл бұрын
@Iniaes In Space The brittleness is not changed. The material is removed. The core of the tap is simply a little bigger than the hole made in to it and it's the left over material that get's destroyed with force.
@wersusjohn69533 жыл бұрын
Выкручивать то хоть пробовали?
@leecundy47983 жыл бұрын
Not being funny but I could remove that tap with a tig welder,a bit of stainless rod and a pair of mole grips.
@jacobjames11713 жыл бұрын
Exactly.
@dr.floridaman48053 жыл бұрын
That's how I removed a broken water pump bolt in my 76 k5 blazer 383sbc. Welded another bolt to it and wrenched it out. KISS method
@thewelfairshop41643 жыл бұрын
Yea this was a botched job
@michaelbamber48873 жыл бұрын
@Garet Curry its called a spark erosion. Used to cut odd shapes too. We have a massive one, big tank 4ft by 6ft.
@pullordienow83923 жыл бұрын
was thinking the same and about $35,000 cheaper without the schooling..
@rkillian723316 сағат бұрын
Very well done. How does the discharge break up the tap? Does it break down the material? I assume the coolants for preventing the aluminium from melting?
@chrisguy973 жыл бұрын
Everybody gangsta till the carbide bit breaks inside the piece
@Split10uk3 жыл бұрын
You can EDM carbide.
@JordanBeagle3 жыл бұрын
@@Split10uk Electronic Dance Music? 😄
@DaIssimo3 жыл бұрын
@@JordanBeagle Sure..... ;p
@watomb3 жыл бұрын
Wondering what the drawing calls out for surface finish
@iandibley80322 жыл бұрын
Many years in engineering, the largest tap I saw snapped by hand was 64 metre tap, old mate was cleaning the threads after the job was galvanised he was striking the tap wrench with lump of wood, easy to remove due the size... the guy would possibly more suited to mowing grass.
@captainmorgan23073 жыл бұрын
I've broken plenty of taps, all small enough or in a way I could remove them. I always wondered about how to remove them when all else failed.
@markwhelan16523 жыл бұрын
Explosives!!! LOL
@TheExplosiveGuy2 жыл бұрын
I've done this _way_ too many times, though I had to use a much simpler head without the nice fine control. The coolant was pumped through the electrodes which were molybdenum tubes instead of solid carbon, and the electrode was vibrated up and down inside the head unit rapidly to form the arcs. I turned into the go-to guy for burning broken taps out because I didn't gouge the threads like everyone else lol, I had a special touch with the janky spindle system which had a bad habit of swerving at inopportune times. Those burners are indispensable, the only alternative to getting broken taps that big out is clamping them into a mill to cut the HSS tap out with carbide, which typically wrecks or breaks at _least_ one cutter. I've gotten lucky and backed a few out with a hammer and punch but that's rare, they usually fracture in multiple places and wedge themselves tight. Ohh, the joys of working on giant parts, the fun never ends...
@AntalopeAUT2 жыл бұрын
3-flute drills kill HSS-E taps securely and a bit cheaper than an endmill :) Just use the drill as if you had to drill into something with 58HRC ;)
@HousesandCars2 жыл бұрын
Do you know the name of this machine?
@TheExplosiveGuy2 жыл бұрын
@@HousesandCars I don't know this specific machine brand, I've only ever used one type made by a company called Electro-Arc which I can highly recommend but I'm sure there are cheaper options out there, they aren't exactly cheap but last literally forever, the unit I used was at least 50 years old and had burned through several thousand taps before I got to it, which I promptly doubled lol. If you just want the name of the tool itself they're called EDM tap burners, there are dozens of different companies that make them. If you're in the market for one I would recommend finding the style that pumps coolant through the electrode itself, and if you can use molybdenum electrodes (available from Electro-Arc), they last by far the longest. The brass electrodes commonly used these days (for their low price) burn through very quickly compared to molybdenum, they last at most 1/4 the amount of time as molybdenum and also cut slower, and contamination in the threads increases too, brass disintegrates and leaves oxides all over the place where the molybdenum doesn't.
@HousesandCars2 жыл бұрын
@@TheExplosiveGuy Wow thank you much. Actually I have this problem... a broken tap inside my engine block and it's 4 inches down. I was thinking about calling around to see if different shops have them in the Dayton area. It would be nice to get this car on the road.
@TheExplosiveGuy2 жыл бұрын
@@HousesandCars I'm not sure what happened, I had a detailed reply for you but youtube must have been hitting the bong again, you know how they are sometimes😉. To recap, you can either find a local machine shop that specializes in larger scale machining or some automotive shops, someone is bound to have a tap burner around you, you will just have to look around. You can also buy a $200-ish chinesium model from amazon or ebay, for your one-off need it might be a bit costly but maybe it will pay off later, assuming you can't find a local shop that can do it for you. Also, if you do end up doing it yourself (even if you don't, make sure whoever does the job follows this advice), if it's 4 inches deep into a threaded hole you are going to need a non-conductive sleeve bushing with coolant pass throughs along the side to guide the electrode down the hole without gouging out the upper hole/threads, think a section of hard plastic tube with an ID of your electrode OD and the same OD as the thread minor ID (or just a nylon bolt with a hole drilled through), with a slit cut down the length along one side, the width of a cut-off wheel on an angle grinder works perfectly. This will guide the electrode straight and centered down the hole and allows coolant to pump through the electrode and back out the hole to flush all the debris out. That deep of a hole will need a lot of coolant flow to remove all the debris created so this _has_ to be done. Of all the tap removal jobs, deep hole removals are the most difficult and risky, so be careful however you proceed.
@chrispools2 жыл бұрын
Although this is on a much bigger scale, we used to remove broken cylinder head bolts by drilling down the middle and inserting a square stud extractor. Any reason why this seemed a bit over the top?
@jfischer5072 жыл бұрын
A tap is not a bolt, it can't be drilled
@chrispools2 жыл бұрын
@@jfischer507 ah right, good to know thank you
@gianki832 жыл бұрын
He could have used a tap extractor
@robertbelcher50682 жыл бұрын
Taps are as hard as the drill bit, very tough going.
@danwerkman3 жыл бұрын
Although this video has no narration , I can still hear the eco's of the swearing when that tap snapped.... 😂
@SirHackaL0t.3 жыл бұрын
No idea what is happening here. Some explanation of the process would be helpful.
@squeak83uk23 жыл бұрын
Basically uses electricity and an electrode and electrolyte to erode a hole in metal... the electrode does not touch the work.. but as the electrolyte fluid fills the gap it arcs.. blowing some of the metal away.. then fresh electrolyte fills the gap, taking away the eroded metal at the same time
@kennygarcia69394 ай бұрын
I always throw the part on a drill press get the tap flatten with and endmill so the drill doesn't walk and drill down the center of the tap with a carbide drill.
@CATANOVA3 ай бұрын
A good solution to the problem. In CNC a similar method to yours would be to helical interpolate, stepping down 100 micron per rev at high spindle speed with plenty of coolant using a small endmill. Hold on to worn endmills and use them for such work, even ones with broken flutes will also work. Make the hole interpolation just shy of the part minor thread diameter for a complete removal.
@sailingkulali3 жыл бұрын
That was amazing. Didn’t realise that exists
@jdrissel3 жыл бұрын
I saw another EDM setup where they used something like clay or plumbers putty to form a dam that went right up to the edge of the hole. After reading some of the other comments it appears there is more than one way to avoid surface damage, but this one was really clever because the fluid only touched the inside of the hole. They put a grove in one side of the putty leading to a drain tube. The fluid never touched anything except the inside of the hole, and there was no surface cleanup needed. It seems to me that your V-Block idea is a good one, but you could use two of them, one with a drain slot and use plumbers putty to fill in between the hole and the V-Blocks. When they were done there was no surface cleanup beyond wiping it down with a solvent, using a tap and a bottoming tap. Also he was working on parts that cost several 100k, and his rig was not portable. You can probably charge more and get more work too if you slightly improve your process... Best of luck.
@dabbigj2 жыл бұрын
It would also be easy to just make a few "dams" in different diameter with outlets and have them on hand