How To Make An Old 3 Jaw Chuck Accurate Again - Basic Machine Shop Maintenance

[@gerpeter4489]

I could actually smell that when you opened the chuck. It is an odour that you never forget. So satifying to watch. 35 year Journeyman here.

[@chuckgrenci6404]

Just chiming in that that smell is memorable. My Dad had a machine shop, and I worked there during my summer vacations (from college); guess who got to clean out the coolant sumps from the Bridgeport's and lathes. Fortunately, I got to do a lot of other things too, learned a lot and have fond memories of working for my Dad.

[@charleswelch249]

You definitely did the best jaw maintenance instructions I've seen yet on KZbin. Great video, Josh, and hopefully, you will get more work soon.

[@TopperMachineLLC]

Thank you! I'm still trying to figure out where the work is at.

[@charleswelch249]

@TopperMachineLLC the machine shop I work at. We do government military jobs. Have you thought about putting in bids for that kinda work. They pay for the shipping and enough up front for the material. I'm just trying to help you out, Josh.

[@TopperMachineLLC]

@charleswelch249 I've tried. Worked with a specialist to get it all set up and going and still can't get into it. If there is something to try to get business, I have done it to the max.

[@charleswelch249]

@TopperMachineLLC I'll look into it further and see if I can get you a connection to try to put in some bids.

[@TopperMachineLLC]

I've worked with the Wisconsin Procurement Institute. They are a free govt service to set up and get you going. After setting it up, we worked to try to get anything. Could never get going. My guy at WPI finally said that my best bet is contracting with the bigger companies that already get the contracts. Well, since there are none in my area, and nobody ill ship up here, that is completely out. I spoke with several and got nowhere. I have just kind of accepted that there is no future here, since so much industry has closed. My whole business was based on industrial repair. We lost around 500 mfg jobs in this region in the last year. Since it is already depressed here, that was a huge and devastating hit.

[@PhilG999]

At an Engineering job I had many years ago they had a small lathe in the "Model Shop". Mostly used for prototype work and "Government Jobs" (i.e. personal projects). I didn't work in that area, so I never really paid any attention to it, but one day *I* needed to use it. That thing looked like it had NEVER been cleaned at all! Covered in swarf and stringy plastic crap! My Granddad was a Lockheed Machinist in Marietta bask in the '40s (then Bell Aircraft). He built Instrument Panels for B-29 Bombers! He taught me to clean the tools after EVERY use! So, I spent more time cleaning that damn thing than I did making the part I needed! Chief Engineer came in while I was cleaning MY swarf off of it. Took one look at the lathe and said: "You should teach the other guys to do that. I can't seem to get them to do it!"

[@bb_37]

@@PhilG999 "Government jobs" = "Anchors for the Swiss Navy"

[@SeeSaw72]

I was an instrument tech at a lumber kiln manufacturer and got to use the shop tool lathe once in a while. Also did government jobs after hours and could use steel from the company as long as you paid for it. A nice place to work from. Used their 5 ton gantry crane to install a V8 engine into my homemade boat. That was 49 years ago. The guys would also custom make me parts afters hours as well. The plant is gone and is now a sub division in Brampton, Ontario. Sad.

[@PhilG999]

@@SeeSaw72 One of my favorite things over the years was the Scrap Bin was always "Fair Game"! I once built an engine stand out of pipe cutoffs. Made it so it could be broken down and put in a car trunk. When I was loading it in my car the asshole "Warehouse Manager" came up and said: "What are you stealing!' I said: "I'm not stealing a God Damn Thing! This came out of the scrap bin. I PAID for the welding rods, the two cans of paint, AND the casters!

[@craigschultz3409]

@@PhilG999 Comes with the job. Cleaning.

[@DJPLAST2]

Chief engineer is not a very good leader. All of my crew knew what the rules were and took care of the machinery as they went.

[@markat9576]

Your video takes me back to my early KZbin watching days, I remember watching Mr Pete222 cleaning out chucks. I would say he’d be pleased with your efforts. Thanks Josh.

[@TopperMachineLLC]

Right on

[@PaulG.x]

Wow! A guy that actually undoes fasteners with hand tools! I thought I would never see that again.

[@markthompson4885]

An bare hands as well.

[@garymallard4699]

Yeah ..i got Cordless Tools..Corded Tools..Air Tools and Hand Tools...and know when to use each type..and when NOT to use them too.!! Everyone with an Impact tool rattles away...without any idea what can happen...or even cares...and i use rubber gloves when really messy..but i can't bother most times.... i see guys working on computers wearing them ( started building puters in the early 1990's )... we used to proudly show our dirty hands and fingernails as PROOF we did Man Work... 🇨🇦🤓✌️

[@captain34ca]

i'd like to send him a decent set of screwdrivers.

[@IrishSchaller]

​@@garymallard4699A cautionary tale Gary. I am seventy years old and hard of hearing, annoying but not really devastating. I worked for many years on big projects in manufacturing as an inspector. Since maybe the end of the second millennium you would be thrown off a site for not wearing hearing protection, before then however, while it may have been mandatory, but 'real' men didn't use earplugs and certainly not headphone style protection or risked being ridiculed by colleagues. I suffer from 'factory hearing loss' the high tones are diminished, pity as it drives my wife bonkers in when she has to repeat everything she says. I have difficulty following conversation among groups, well you get the message. While lots of people bemoan HSE rules, they are meant to save you from my sort of problem or worse.

[@LennyConetsco]

Very informative. Love the description of the smell of the old grease. There are guys that think the only way to lubricate something is to use grease. They don't realize grease gets old and dry and attracts everything.

[@michaelgrauvogl689]

Thank you! It was a great pleasure to watch a professional taking care of his tools!

[@gregforster5913]

Greg from northern Michigan. Great tutorial on chuck maintenance. The time spent on this will save valuable time during rush jobs later on. Well done !

[@jamespenny2798]

I'm a self-taught and primary machinist at our shop. I recently performed this very maintenance on our 3 jaw chuck and could have used the information presented in this video at the time to speed things up. I pretty much did everything in this video, except I did use grease instead of waylube during reassembly. It now it makes perfect sense to use waylube, but I wonder if I can use it as is till I service it again in the future? My learning of machining has been a mix of KZbin videos and faking it with a few mistakes here and there. I truly appreciate these video and the effort that goes into making them. Thanks James P Freedom Concepts Manitoba CA

[@ddssfsef82937rifbzkb]

grease just holds chips so you will have yto clean it out again faster

[@Dogfather66227]

Just went through this process with a 6-jaw and was surprised at the stuff inside. I think it gets in there by osmosis. Great instructional. Thanks for posting.

[@billdunlop8683]

Great video Josh, As someone who has worked in Maintenance for decades I always had in the back of my mind " I wonder what kind of maintenance schedule Josh follows as someone who runs his own business?" great to hear that you take care of your tools as per the old saying.

[@TopperMachineLLC]

I have some things that just get done wether it needs it or not. It is like doing oil changes, some never change oil on machines. I call oil, cheap insurance.

[@2xKTfc]

@@TopperMachineLLC Indeed, oil is a lot cheaper than new metal.

[@nicksparks6147]

Great video - thanks for the inspiration. Went out and stripped and cleaned a 3-jaw chuck which had been notchy and tight since I bought it with my lathe from a nearby college. Absolutely full of chips, grease and I think sawdust. Now it turns as smooth as silk. Should have done it ages ago.

[@donteeple6124]

Morning Josh. This is probably one of your best and one of the best overall ,on YT, informative/ teaching videos for dismantling and servicing a lathe chuck, bar none. Informative, precise, descriptive, easily understood and straight to the point. The camera work and close ups of the alignment of the scroll when reattaching the jaws were invaluable and absolutely excellent. Others just have just done the reassembly and never showed the fine details of how to actually do it. For those that have never seen or done this or those of us who just love seeing the professionalism of a MASTER machinist, your videos like this are a breath of fresh air. Keep them up and spread the knowledge. Don

[@edsmachine93]

Nice work Josh. I would venture to say someone clean the chuck before and put the grease in there and was never disassembled again untill you did it. Nice old chuck for sure. Can't wait to see you use it and see how close it chucks. Have a great weekend. 👍

[@badiyan]

I liked the way you are working step by step and knowledge about chucks and consideration of your safety. Thanks I'm happy to watch you working.

[@robertwetherington3372]

Machine shop I worked in had 3 jaw buck chucks that were udjustable. We also had a grimder that mounted to tool post that was used to grind the Chuck jaws round again. That 15inch buck chuck I have used for 30 years its an incredible piece

[@danielpullum1907]

Thanks Topper!!! I have a friend down in Texas that complained about his 3-jaw chuck not running true. I remember a friend truing his ole 3-jaw by putting a ring on the jaws to lock the jaws and took a pedestal grinder bolted to the compound and ground the jaws just enough to clean the contact line on the jaws. I bought "True adjust 3-jaw after I got my Sheldon 14X36 variable speed 2hp lathe and it still runs true from the first adjustment. I bought that chuck from Shar Equipment out of St. Louis. It has been a wonderful Happy Trails Ye Ole Caterpillar Cowboy in Illinois

[@alanm3438]

Once again, you have taken me places that I have never been to before. You have a way of saying things that are so down to earth. I guess my shop teachers were not allowed to say it like you do. I admire your skill and your ability to know what is important and what is not. I wish that I had half of your skill and health. Thanks for the video. You always do a nice job on filming and explaining the job at hand. Your the best!!!!! I hope Rocky is ok. I put my dog Cooper down this week.

[@TopperMachineLLC]

I'm sorry to hear about Cooper. He was a lucky dog to have you.

[@alanm3438]

@@TopperMachineLLC Thanks!!! I got him when he was pup and we were together for 16 years.

[@jeffryblackmon4846]

@@alanm3438 It's not easy doing that. Had to do it too many times.

[@EdwardKilner]

Nicely done. Always wondered how those things worked. Thank you.

[@bobweiram6321]

It's really cool how machines maintain their proportions when scaled.

[@danalexandroaie3233]

Finally meet someone open-minded and clever not to use gloves during maintenance and general mechanical operations. I've seen plenty of videos with people wearing gloves even when writing notes or cleaning their noses. We want to protect our hands, they said. But nobody sees the real danger of using gloves during drilling or grinding on a bench drill or grinder. The drill may catch their gloves and then remove their hands from the shoulder completely. Thank you Sir for your nice maintenance video, your explanation were very detailed, your very professional skills will be very helpful to those willing to clean their machines.

[@alandawson2813]

Thanks Josh. Now I know what I needed to do to the chuck on the little lathe i have. Then my next mission to work out how to remove the head stock shaft as the felt seals are no longer holding oil in. Going to be another learning curve. Happy days from kiwi land.

[@randyshoquist7726]

I was a bicycle mechanic for 26 years, and have been a hobby machinist for forty. It shouldn't surprise me, but sometimes still does, how much function you can restore to a mechanism simply by cleaning and lubricating. As for chuck lubrication, some prefer oil, some don't for obvious reasons. After some study, I've chosen grease. There are greases designed for chucks which you can find at Amazon and industrial tool suppliers. Röhm has a treatise on the topic which you can find online, and they offer a special grease. Bison has chuck grease, too. (I recognize that it could be just opportunities to sell expensive stuff that you don't really need, if you want to take a cynical view.) After watching Robin Renzetti's video on chuck maintenance I use a thin aplication of molybdenum disulfide grease. I chose Molylote GN Paste, because it seems to fit the bill, but mostly because I already had a tube on hand.

[@Skoko1945-xo3yn]

First time I ever seen inside a laith chuck, Really looks simple.

[@gradstdnt7232]

I had an 8 inch 3 jaw I picked up used at action. It had over 0.007" runout. After teardown for cleaning like you did hear, I noticed none of the jaws, slots, or reversible portion of the jaws were marked. After assembly, I altered the position of each jaw for different positions. Altered top jaws to the base jaws. Went through every iteration of base jaw to reversible top jaw to each slot. Each time measuring runout. I managed to find the best combination with a runout down to 0.002". I then marked each jaw and slot to ensure proper reassembly the next time it's cleaned. I went from a barely acceptable lathe chuck to one that has served me well.

[@kd5byb]

Nice work! I've always wanted to see the inside of a three-jaw chuck. Thank you!

[@JohnDoe-ls2ww]

When you were checking the chuck for the jaw numbers I could smell that nastiness you described lol. Keep on keeping on 👍

[@jeffryblackmon4846]

It's strange how that old grease/dirt odor came back (yuck! bleh!) watching Josh.

[@greggc8088]

We use a 3 jaw on the brake lathe for rotors and keeping it clean is surely important. Thanks for the vid.

[@EightBall-h9p]

Many thanks for share with us the cleaning process.

[@wobbbs]

hi Josh mee again great video, with you all the way on gloves, more a hazard when working with rotating metal etc. Shame you're so far away or I'd come visit. Wishing you and your family all the best for the coming year, David

[@johnspathonis1078]

Hello. I recently saw a well respected machinist say that only one consistent tightening point should be used for accurate and repeatable work. That is the tightening point that was used when the jaws were originally ground concentric. I filed this information away in the back of my head. I just upgraded my three jaw chuck (200mm DI-6) to a "Strong" chuck out of Taiwan with two piece jaws. This is a reputable manufacturer. I was surprised to see that the chuck manufacturer said the same thing. They even pointed to the appropriate tightening point with an arrow. So repeatability and accuracy also depends on how the chuck is tightened. I would be interested in your experience. Cheers

[@jamiemacdonald436]

Great video Josh. I work with a guy that uses the wrong lubricant in the wrong amounts all the time. He needs to watch this. He also thinks WD-40 is a lubricant if that helps you understand.

[@TopperMachineLLC]

Lol. Man, I feel for you.

[@Randysshop]

Yep good advise to keep the chuck clean Josh, As well the rest of the machine. Have seen machines so covered in chips and what not all you can see is the ways.

[@crawford1656]

Thank you Top! I learn something new everyday. I enjoy and learn from every one of your videos.

[@jansmit4628]

Nice instruction video on the chuck. I always wondered as a non machinist how the three jaws could properly line up when placing the one by one back after rotating them for clamping a workpiece on its inner or outer side. But now I understand the the three numbered jaw have different offsets in there teeth from the beginning. It would have been nice if you had shown the claws side by side to have a look on it.

[@chrisrudy1969]

Thank you for this! Just found and subscribed to your channel! I have an older lathe that I'm refurbishing and my chucks are out of true. Going to be getting my hands dirty!

[@mrricky3816]

Thanks!

[@TopperMachineLLC]

Thank you!

[@JerroldKrenek]

i always wondered how you got the jaws installed in the correct positions, i would see guys pull them out and reverse them. thenaks for explaning the prosess. i was a maint tech for 25 years at Snapper in McDonough GA befor Briggs shut us down. praying that you start to get busy again.

[@iandibley8032]

G'day Josh totally correct never grease 3or 4 chucks, I take particular care cleaning lathe & chuck before fitting and jaws are removed frequently to clean the jaws and the scroll. The rear plate was removed as you did periodically. I use a very light lube on jaws & scroll, never gripping rough black bar, etc, too tight if at all to prevent the scroll from being strained. Quality chuck running with in .001" on ground bar, no problem. It's hard to beat good maintenance. Nice job, p.s. the previous owner knocked the face of the 3 around in one section ,hard to know how it happened.

[@GreeceUranusPutin]

I've had a 30 year old Jet 13-40 for about 4 years and recently decided to test runout and got 6-7 thousandths. I took it apart for a cleaning and it was fine (did that when I got it). Then I took the feet off the jaws to check for numbers and found a pair were mixed up. I put it back together by the numbers and only got 1 thousandth runout. Exact same design as chuck in the video. Did I mix them up? I don't know. Pretty good for an old Taiwanese budget lathe.

[@PhotoArtBrussels]

Thank you for the video Josh. Great result

[@petegraham1458]

I hope you are getting some new work opportunities! Nice clean up on the 3 jaw !

[@TopperMachineLLC]

Nothing yet, but still trying.

[@Matt-my7pz]

Definitely would have liked to see how true it ran after. Good video.

[@TopperMachineLLC]

@@Matt-my7pz stay tuned.

[@brianevans1946]

Good video. I can get my 3-jaw to run true all day. And I share your sentiment with the gloves..

[@gazzoyep7900]

Thanks Josh :) Just a straight down the line shop info video. Thank You Sir! :)

[@GeorgeBracht]

Josh Nice job👍 One of our big 3 jaws developed some slight run out. We did just as you did. Still did it. For grins we took the locking pins out & stoned the mounting face. Felt it cut in a few places. Apparently a small chip got pinched when installing the chuck at some point Runs with in a half no problem now

[@jeeprenegade1985]

Nice work. One thing I always made sure I did when doing shaft work, was to chuck on the part lightly before putting the live center in, then tighten the chuck the rest of the way. Also it helps to chuck on 3/8" or no more than 1/2" deep in the jaws when finish turning. That way the tailstock live center, or steady rest, can move the shaft into position. The chuck jaws can act as a universal joint, and it reduces springing in the shaft, or runout at the tailstock end. Also known as Nutation. If the tailstock center itself is running out, or the tailstock quill is moving, it's likely from nutation. Putting copper or aluminum strips in between the shaft and chuck jaws will also help reduce nutation. Turning between centers also eliminates this problem. I used to chuck on a piece of mild steel and machine a 60° point on it. That was my headstock center. Put a drive dog on the work piece and put the drive dog tail against one of the chuck jaws.

[@ronnyrice697]

Your instructions were top notch. I was always scared to trust a three jaw

[@ypaulbrown]

8:20, amazing the ribbon of grease you removed, good reason to only use oil in a chuck instead of grease…

[@BrucePierson]

Very interesting instructional video on how to clean a chuck.

[@TopperMachineLLC]

Glad you liked it.

[@kentuckytrapper780]

I absolutely dread having to do that,lol 😂, but it makes a world of difference, great video Josh, keep'um coming..

[@rosshimebauch3769]

When filing on the lathe, you should do it left handed. What would you do if you were using a giant chuck or face plate that was too big to reach around.

[@davidbramel345]

Great job! That thing was nasty. Enjoy your videos, hope work picks up soon!

[@TopperMachineLLC]

Thanks, I need the work, I'm getting hungry!

[@davidaarons2488]

Wow, the 6 million dollar man returns, LOL. I know that smell, rear ends that haven't had gear oil changed, also when pulling apart diesel engines, terrible smell. When I worked i didn't wear gloves either. So only a little way oil, didn't know that, yer right I learned something today, Thanks Josh.

[@PhilG999]

I was a Warranty Engineer for Deutz here in Atlanta in the late '80s and early '90s (for 8 years). I got all the engines owners had destroyed. Of course, they all claimed, "Factory Defect"! That smell after they had spun a rod bearing and ran it until the con rod exited the block was like a roadkill milkshake left out in the sun for a week! You know what happens to a Diesel when it gets run low on oil and gets a gulp of air!

[@haroldchoate7497]

I ran a machine shop for years. All machinists who are worth their salt share some attitudes and mannerisms such as doing everything to the same standard of precision and using their sense of touch to confirm a surface is ok. I see Josh exhibit these in every video he posts. It brings back memories of people and experiences that I cherish. Thanks

[@markvoluckas4571]

Wonder if it was actually grease in there? Reason I wonder is when I bought my 14" Logan lathe over 20 years ago I opened up the chuck and cleaned it and oiled it. Couple years ago was getting a little stiff and opened it up again and found similar grey matter, I can only imagine it's cutting oil and chips that get mangled together in there especially plastics and such

[@AaronEngineering]

Good work on tearing down that 3 jaw chuck and reassembling it. Hope you're doing well Josh. Cheers from downunder. Aaron.

[@mudgrippmike3489]

I subscribed right after your comments about rubber gloves.... love it haha

[@JonesMetalCraft]

Ugh...I need to do the same thing on my Pratt Bernard (Crap Burner) chuck. Thanks for sharing.

[@melgross]

I bought a new Buck 8” 3 jaw adjust tru chuck four years ago. It’s very easy to get it concentric to the spec, which is 0.0005”. A bit more work, using a very accurate 1” 6” pin, got me to 0.0002”. I’ve always found that with a very good chuck, not misused, accuracy obtained at 1” diameter will be very close to that over about one third to three times that diameter. Setting with a half inch pin isn’t the best idea. It’s too thin. Keep in mind that high quality 5-C collets meet a standard of just 0.0007”, and super accurate ones such as the high end line from Hardinge, are just 0.0005”. You can get 0.0002” from high accuracy ER collets, but you need a high accuracy collet chuck that also allows centering. Then you don’t get the wide chucking range of an actual chuck. I use both, but a good quality Techniks set of collets and that chuck costs about as much as the Buck. By the way, Josh is wrong about the grease. All quality scroll manufacturers highly recommend that you use a moly grease in their scroll chucks, never oil. I’ve dismantled many chucks over the years almost 60 years, and the chucks that are worn the worst, used oil. Rolm states that without their grease, you can expect a 25% decrease in holding power. Kitigawa used to make grease, by spun it off. It’s called EZ Lub. It’s what I use in my chucks. Buck says the same thing. You’re really supposed to take your chucks apart every so often, clean and relabel them. That’s where a problem comes from. Additionally, many people don’t use their chucks properly. They wind the jaws too far out in order to put a part in that’s beyond the specs. That allows chips to enter the scroll as it’s no longer protected by the inner rim of the body. It also wears the scroll and jaws as you don’t get full engagement, so that puts too much pressure on the remaining teeth.

[@garydotson2277]

Thanks for this video! I’m going to clean my chucks today!

[@TopperMachineLLC]

You won't regret it.

[@midwestkustomz6350]

Cheers from the Midwest Kustomz Channel! Love watching your Channel! Have been a Subscriber for a long time. You've learned me a thing or two lol!

[@eliotmansfield]

my dad taught me to always tighten and loosen on the same keyhole location - he said it wears and pulls down consistently - i get about a thou runout and that’s on a 1950’s colchester student roundhead.

[@ScaleCaterpillar]

This is the correct way to close a chuck, all good quality chucks have the master keyhole stamped with a "O" .Never tighten the other keyhole positions If you have a chuck that has the "O" stamp, test the run out on tightening on each keyhole position This will show that the chuck is only accurate if you close the chuck using the master If you want repeatabilty on any three jaw chuck always use just one of the keyhole positions to loosen end tighten the workpiece

[@ypaulbrown]

Love your Lucas work bench

[@SepticWhelk]

And the sweat ! Gloves full of sweat loverly ! Perhaps the old molybdenum grease is why it's not worn .

[@jimyekel1396]

Watching you try to open the jaws was actually painful. Great channel. 👍

[@Klingonbr]

Foi uma ótima lição. Obrigado pelo vídeo.

[@hacc220able]

A Google search seems to relate the bad odor to aldehydes and ketones produced from a process caused rancidity. Thanks for sharing

[@bcbloc02]

My 3jaw runs about .001-.003” run out depending on the diameter of what I am chucking on. Going to tightening with a master jaw made a big difference in how repeatable it was on run out. 😊

[@GeoffSimpson-q3l]

I tighten the jaw key that follows the high spot. it brings my 10" Rohm as close to zero as you can get.

[@curtisroberts9137]

The smell of old rancid grease or gear oil is one of the worst smells. I wonder if that thing wasn't being stored outside before they shipped it. I found that water getting into the oil and grease can cause that smell. I purchased a ford cutaway van a few years ago that had been sitting a few years and the rear diff got water in it. That smell was abominable. Also yes, a little rubber makes it harder to feel things.... I still prefer gloves myself working on cars, but to each their own. You're a grown man. People should shut their faces. Nice video as usual.

[@ronwade2206]

I used the 130 year old Lathes from Selmer at Conn Selmer Vincent Bach at it had a mismatched chuck, I clean it but the only way it would run true was out of order jaws. Granadilla blocks are hard wood man

[@greglaroche1753]

That was sure one dirty chuck! Thanks for the video.

[@Deg99]

I agree and had a laugh at your proctologist comment.....these guys also have a large can of water always within reach.....I like your down to earth/real life shop!... 🙂

[@sternenfee9046]

We learned that a chuck has to be maintained every week to prevent any disadvantages in accuracy and safety. We never waited until the chuck looked like you show. Too much grease too much chips anywhere. Used the schedule and sequence to clean my chuck at every end of my working day and weekly I have done a a major cleaning after that this major maintenance like you show can be done once a year.

[@TopperMachineLLC]

I bought this one like this, ran the job I bought it for the day it came. Now it is ready for whatever is next. I wish I had taken the 6 hours to clean before doing that job though.

[@GardenTractorBoy]

This was great information and a good video. It sounds like we need to investigate and clean our chucks

[@TopperMachineLLC]

Yes you do

[@eyuptony]

I'm with you on keeping the chucks clean. There's nothing worse than jaws with tight spots. All that crap inside will throw it out of balance very slightly as well.

[@bruceferrero8178]

Very good video. Just like watching the guys on KZbin cleaning and reassembling Rolex watches! 😉

[@TopperMachineLLC]

Those are fun to watch.

[@davidschliebe246]

Really enjoy your video's

[@maureenleckie6216]

Can you also spin the chuck under power and then skim the jaws,giving absolute concentricity.?

[@oldadthomas]

Great tutorial on chuck maintenance

[@chieft3357]

In the last 17 yrs that I've had my 3 jaw, it's been cleaned many times. It looks as if that 3 jaw you are working wasn't taken care of as it should have been. So sad you have to do the 😝cleaning. All the best to ya'. 😃

[@ypaulbrown]

Wonderful Josh…thanks so much…cheers from Orlando, Paulie….hey, you need one of your cool ball ❤❤❤❤caps…will not make your hair fall out like Uncle Fester…get a cigar box to save your hair….❤❤❤❤❤

[@jamieyz]

My proctologist doesn’t use gloves as he can’t feel the prostate very well. Great video.

[@tomessary4099]

Magnificent work!!!! THANKS!!!!!!

[@DJPLAST2]

You are absolutely right about the rubber gloves. Been around machinery and engines my whole life, hands still attached and working. Never had my hands snagged into a project because they got caught on something. Been that way for close to 70 years now. Nothing like being able to feel what you are working on.

[@toolthoughts]

They don't need to be super thick. Contact dermatitis is no joke either.

[@Tasarran]

Only time you ever really need gloves is when you're doing something like cleaning out a bunch of swarf or grabbing stuff that can bite you. Wearing gloves just to keep your hands clean is extremely counter productive

[@nikspanakis]

Problem is given enough time working with no gloves, your skin becomes a glued glove you can't remove, with equally bad feel lol.

[@captcarlos]

Good vid, that’s all you need if the scroll is still good. I have modified the backing plate to allow adjustment of ‘true’. Not for the …. Casual.

[@scottfarnham2717]

Great video, Josh!! Such an important thing to do. Excellent job marking everything for reassembling, especially for older chucks where there is probably more wear. Thank you for sharing, Josh!!

[@jeffreyyoung4104]

?? I was just thinking of tearing into an antique 3 jaw chuck, and this video pops up? Mine is for a 6 inch throw lathe, so not as heavy and I can work on it at the kitchen table.

[@DavoShed]

Great job cleaning that out. That was really dirty. Would have been a good time to stone the face while you had it all apart as it looked a bit dinged up and you could have washed off any dust while you had it apart. I guess as you said you don’t need it to be that accurate. Looks like a nice big chuck.

[@stingcool9455]

My ocd wouldn't let me using a metal pick and scraper. I would have had to use a wood skewer and plastic scraper to keep adding scratches. Also I couldn't use a metal hammer any where around the work; I used a brass hammer just in case it hit the metal. And lastly I don't know what I'd used on prying it apart versus a metal screw driver.

[@TopperMachineLLC]

🤣🤣🤣🤣

[@Hyratel]

A, you are a braver man than me to test for remaining burr on a running part barehanded. B, you oil it like a watch: just enough oil to ride the contact faces without getting everywhere, and for similar reasons, albeit 100 times larger. at wristwatch scales, a cotton fiber is like a stringy chip that just won't break on a lathe. C, have you ever had to grind in a 3 jaw which won't run true even freshly cleaned? I know I've seen it done but couldn't recall whose channel, the key was to put clamping load on it via the topjaw screws to take up the free play in the scroll

[@TopperMachineLLC]

A. learned how to do it a long time ago. Little to no pressure. You will feel a burr before it cuts you. B. that is correct, no need to drown it. C. Yes, and i know all about the load. But here is the kicker, if it needs a load to grind, it has far more issues than you should waste time with. Chucks are consumables.

[@calebfaires9782]

At my first machinist job the second thing I got yelled at was using a cheater bar to tighten a three jaw chuck because it "made them run out" this was also a shop that didn't give guys time to clean up and maintain the machines let alone encourage either of those. So not sure if I really was in the wrong or if their maintenance practices were just the problem. Where I work is all collet and 4 jaw chucks plus a lot of work between centers with the only 3 jaws being the hydraulic ones on the CNC machines, so never took the time to find out if they were lying.

[@37yearsofanythingisenough39]

You must have a cordless impact driver for taking bolts and screws out??

[@andrewhorsburgh2549]

Good at what you do. Workshop could also do with a clean.

[@Roberty98]

I did something similar but it was rather external than internal because the company orders technicians who repair things for us and they do great job. After a guy retired I came into his workplace and worked for 1 year learning manual programming and so on. Then I was wondering why some jaw screws are so soft at tightening and also why am I so unorganized. I cleaned my workplace and then started looking closer at the jaws and saw grease with chips. That`s why! Then looked into the corners of the T-nuts and also there was a lot of grease. Nothing could sit properly this way and since then I quickly clean those areas with a towel and no problems since then. Last year I had opportunity to throw out welded jaws from 2000`s. Schunk`s jaw manuals say to never do it, life hazard. Then I saw screws that we use to mount the parts. The grade does not match the grade that should be on the T-nuts. 8.8 and 12.9 is another league. Lenght of the screws were too short too. I was in real danger and I took care of it. After all is clean I automatically got more aware about the right work holding.

[@robertmorrison886]

Great job 👍

[@zjtr10since80]

Thanks for sharing your experience.

[@d6joe]

Would the nasty smell be from old sour coolant in with the grease?

[@TopperMachineLLC]

Possible. Of a tallow based grease.

[@izsakitt3711]

Do you have ultrasonic cleaners? Parts washer?

[@eclipseslayer98]

8:54 Same. People keep telling me that I shouldn't be eating lead fishing weights, but they shouldn't look and taste so good if they're not meant to be eaten.

[@george-b3i-d2d]

i use a degreaser called Purple Power. water soluble works great also works removing pitch from table/miter saw blades

[@TopperMachineLLC]

I have used that before