MACHINE SHOP TIPS #98 Grinding a Lathe Threading Tool tubalcain

Tubalcain demonstrates how to grind a 60 degree threading tool. Two methods--free hand & with a grinding jig.

[@_CAT-lg4sr]

Jordan is so very lucky to have a kind and patient grandpa who has so much knowledge on many diverse subjects to share with him! (I wish was him.) But Mr. Pete, I feel we're all pretty darn lucky out here to have you teaching us via You Tube, it's the next best thing! Thank you.

[@Carlboe1]

Mr Pete I have been a tool and die maker for over 29 years. I run a cnc shop and have a young man that I had do a little project on Friday. The project was to a write program using the rotory table for this jig. Boy can he grind threading tools now. We now have one in 1/4,3/8 and 1/2. Acme to. These are real nice jigs. Thank you vary much for the video. Carl Boe

[@davidgagnon2849]

Mr. Pete, whatever I need to study up on, you very often have a video explaining or showing how to do it. I don't think I'll ever see every one of your videos, but I'm sure glad they're there!

[@mrpete222]

👍👍

[@jonlogan8171]

Excellent video from a great teacher. Thanks much for spreading your knowledge! And for those of you watching tubalcain, if you want to say thank you, watch the whole ad with his videos. That's how he gets paid. ;-)

[@mrpete222]

+Jon Logan THANK YOU!

[@tomherd4179]

Really like your special tool and will be on the mill today making one like it. With poorer eye sight I think it would be very helpful. Thanks Again 🙂

[@pappy1812]

Just wanted to say thanks for such excellent tutorials. I have just set up my own small workshop and I was totally lost until I found these videos.

[@salvatoremicale7746]

i love watching yubalcain. he is so clear.you understand everything.

[@fall22123]

I remember the tool bits we had to grind by hand in tech school. The three we had to make were a turning bit, ground to certain angles, a 60 deg threading bit, and an acme threading bit, of course they were all needed for projects. We made heavy-duty planer jacks with acme threads. You're right, it is very difficult, but not impossible to do. By far, the most difficult was the acme bit. I still have it in my toolbox after all these years.

[@guyward5137]

Always enjoy. Mr Pete. The best education you will find on KZbin. Would of loved a shop teacher with his knowledge a devotion

[@garrettmesser3977]

Guy Ward if only you would've had a better grammar teacher

[@denouch358]

Mr Pete, this is a great working jig. I have never been able to grind a nice looking threading tool until I made your jig. I ended up making 2 of them, 5/16 and 3/8. Thanks for the valuable information.

[@kerrywil1]

Very nice video Thank you for taking the time to make, edit and release the video

[@mrpete222]

👍👍

[@davidpetersonharvey]

Another great video from my favorite shop teacher.

[@mrpete222]

Thanks

[@reconteamohio]

Mr. Pete, Looking back on my personal experience with one of my "SHOP TEACHERS" I now realize that he was not nearly as good as he thought he was. As a matter of fact, I believe that he derived great pleasure from watching us students suffer as we tried in vain to get the cutter shaped the correct way. Did I enjoy my class,....NO. But I learned to keep searching for the answers that were out there somewhere! THANK YOU THANK YOU THANK YOU Now I feel like going back and doing it right the first time! I love your videos!

[@mrpete222]

Thank you very much!

[@FINNTVBASSFISHING]

wish I could of had this guy as my shop teacher he shows alot of tips you can ACTUALLY use in a shop in the field not just how the books each you if I had to say how much I use from collage and from what iv learned from Mr Pete and self taught I'd say it's a good 10 to 1 ratio

[@mrpete222]

THANK YOU VERY MUCH!!!!!!!!!!!

[@FINNTVBASSFISHING]

+mrpete222 no thank you for sharing your knowledge !!

[@FINNTVBASSFISHING]

+mrpete222 thank you for sharing your knowledge !!.. I'm a young guy I run a pump shop everything we have is old manual equipment that iv worked on to get in good working order to rebuild these pumps, all the guys around here that have experience are either retired or dead and all there knowledge is doing no good to anyone so I really do appreciate what you do!

[@mangalsahani8462]

M

[@KeithFenner]

Thanks for the comment and I enjoyed the video, and liked the jig idea for creating the angles! I had always been more into right and left handed tooling ready to thread up to a shoulder, creating more bits because of limited pitch range, ending up with plenty of centered bits as they aged and worn back the leading edges. Sometimes a negative top angle was used to keep from sucking bits due to backlash problems in cross feed screws. ;{)---

[@simpleman283]

cut a part to plan dimensions, then check it against an available constant. We can always blame the plan. Right?

[@ronaldcrowder404]

Absolutely awesome a jig is best way because most of us won't be grinding every day ! Jig save time and make more accurate! Thank you ! Also I am going to fit mine to but belt sander when I get it done to keep all angles square and accurate to angles needed !

[@bullseye9899]

Great video sir! I've been looking for a simple jig to sharpen lathe tools. Thanks!

[@dcptp]

Thanks for the videos this has gave me a idea I have a radial arm saw and a metal cutting disk hmmm. Keep up the great info Mr. Pete

[@ChrisJB84]

Very nice Mr.Pete!!!! I always like your videos!! I wish they had machine shop when I went to school!!

[@charlesgullette2905]

Love your videos you are a great teacher and like all the other comments you make during them. I like the name you go by tells me a lot about your values must be a traveling man keep up the great work and thanks.

[@clockk2008]

thanks for uploading the video .Its very useful for me!!

[@MrUbiquitousTech]

What can I say? Mr Pete=The Man!

[@walterbond3628]

if you major to land in your jig for your bench grinder / table you can put a fence on it like a table song where you can move it a little bit and um if you will run a bolt through it the whole length you can use it as a clamp to clamp in place so it's more movable and if you got any way to draw it out to make more sense because they usually have to draw up my plans for other people to understand them I usually can see it in my head in detail thank you for your videos this is not a generic thank you thank you so much

Thanks a lot for this excellent video!!!

[@mrpete222]

+José Luis Higareda Thanks for watching

[@RollingEasy]

Here's a good tip. Just the other day I needed to grind a 55deg BSPP single point tool. I set up the Compound at 62.5deg using Trig. (Sin 62.5 x 125 = 111). This meaning I could machine a 3/4" piece of stock at 27.5 deg of chamfer. I did two pieces and drilled a small hole in one. I set one in the tailstock and the other in the chuck and brought them together. A perfect 55deg to set the tool grind. And exactly the same for any tool angle needed if you don't have the gauges.

[@mrpete222]

Great tip!

[@not2fast4u2c]

Thank You for another Fine Video !!!

[@suleshangodoyin]

Good view shows,thanks. It's me, Sule Shangodoyin.

[@mrpete222]

+Sule Shangodoyin thanks for watching

[@lloydbaker7099]

Great content I'm trying to make a homemade designated tool grinder your techniques are great help

[@Opinionator52]

I'm glad you watched! I was grinding HSS lathe tools for all manner of material and operation 30 years ago... I happy to hear of any young person learning machine work especially if your starting with hands on manual machines. I watch as many of these videos as I can. I'd love to see someone put a cross slide and rotary table on a Bridgeport Mill and make a complex part. It would likely be an old timer. Cheers! :o] O,,,

[@asmiter]

Thank you for making the video.

[@skateboard4zero]

Ahem! I'm an apprentice Miller/Turner and I started when I was 16! Although they don't teach you anything about tool grinding at-all at college and at work we have a drill sharpener, but that can be very temprimental!

[@soezaya]

Good to know , thank for uploading this video

[@mrpete222]

+soezaya 10 thanks for watching

[@debarra136]

That was great, thanks.

[@mtnviper1963]

the blue Norton grinding wheels, grind much faster and cooler than the general purpose wheels, as well as retaining stone shape much better.They are fairly cheap on ebay.

[@MrMondaniels]

Thanks, I will use this tips

[@mrpete222]

+Daniel Monsalve Thanks for watching

[@scheppach69]

Good work mrpete & hi Jordan :)

[@MotoDeSoto]

Well done. Thanks.

[@shopdogsam]

,,,,, that's me in my regular seat, first row, third seat from the middle,, great lesson,

[@Helmetfires]

Does the 60 degree angle change when you grind the top rake? Seems like the angle would be a smidge smaller since the sides have the clearance but hard to wrap my feeble mind around the angles...probably splitting hairs. Thanks for taking the time to do all the videos!

[@billshiff2060]

2:36 Actually it is a requirement that the tip not be sharp. For cutting a male external thread the specs call for a flat width of minimum of PITCH x .125 and a maximum of PITCH x .250 For cutting female internal threads the tool must have a flat width of minimum of PITCH x .041667 and a maximum of PITCH x .125 A radius that fits inside those limits is allowed but not required.

[@jokb235]

It took me forever to get it right in class! Wish I had a jig. lol

[@KidKarate1996]

Anyone can do it with a jig, it takes skill to do it free hand and do it right. I spent a whole week learning how to grind drills and toolbits my sophomore year.

[@commando340]

excellent video-thanks

[@mrpete222]

+commando340 Thanks for watching

[@eliduttman315]

Sir: Forgive me if I err in digging through memories more than 50 years old. I recall a machine shop teacher telling us that those angled tool holders spared us the chore of grinding a 20 degree back rake into turning and facing bits. I was NOT a good machinist and only too glad to get a mandatory class under my belt. Eli D.

[@mrpete222]

Don't know. A while back I had to do that & it worked fine?????

[@CllAslnr]

Kalemi yaktın be usta...:)

[@thebrokenbone]

hi mr peterson, hope you see this question on your notifications. it`s basic but what is the criteria for choosing the diamond size (in carats)(single point). i went to the local machine supply store and they have from 0.25, 0.5,0.75 and 1 (prices double the size) and they are as clueless as i am about which size is right. thank you very much for teaching the novice (like me, not young but novice to machining). peter penca

[@GK1918]

Hy I managed somehow to get vido playing but the audio now sound like driving on a dirt road. Maybe also a tip for someone, I vise up the blank died and scribed and take it down with a die grinder, taking the majority off then back to the grinder to finish. Air die grinder is fast & I have more control & no hot fingers, saving grinding wheel. I like your jig now ill fire up my shaper. Thanks oh also Kieths audios doing same thing. I'll call him he is good with PCs. thanks again Sam

[@1otviii]

I have watched a lot of your videos. I got a logan 10 inch lathe and have been turning a lot of steel into chips. I have a little round tool for making threads, and no matter wha I did, I could not make a good thread. I gave up, and ground one. Night and day difference, the threads now are acceptable, and they were horrible before. So thanks for what you do. You explain thing better than anyone, I really appreciate it. Tom

[@mrpete222]

THANKS, Tom

[@sangli1959]

Whenever u cut any thread in any lathe the following angle and leading angle grinding is important . then there is no problem uccer at the time of threading . leading angle give ( clearance angle ) given on the left side of the RH thread to remove the material and the following angle given on the right side ( clearance angle ) helps to finish the remaining material at the time of threading

[@Opinionator52]

I wonder how many 16 year old gamers are leaving their game long enough to learn these valuable techniques? :o] O,,,

[@xmachine7003]

Not too many,I am afraid. Shame for them.

[@hidraulicamoura5920]

muito bom o seu trabalho.

[@ammartamimi9864]

Do they make small grinding wheel that you can install on the lathe? This would give you all the control for any angle by holding the tool in the post and you are set to grind.

[@AsiAzzy]

Also on the method I'm, using: A disc sander and a cross slide vice clamped to the sander table and I just run it at an angle and push the tool into the disc. (I have active water cooling on this sander - it's for preparing surfaces for microscope so active cooling, 12" buffing and sanding wheels, lapping compounds, nital bath at the finish, all without overheating that destroys the surface crystals on the metal.)

[@aftabimamdapur6826]

thanks for the refrance

[@ExtantFrodo2]

Very nice. I would have milled the bottom side of the jig because I can't change the angle of the tool rest on my grinder.

[@mrpete222]

Lapping sounds good, but might be overkill.

[@xB1GKILLERX]

gr8t video thats a easy tool to grind hard one 4 me is the inside Threading tool

[@StuHo1mez]

Hello sir, i loved this video, i actually did this at work and it worked great, anyways are you ok, you haven`t uploaded for a while and im a little concerned, yours, Stewart

[@garyagen7581]

Please do a video on making this jig. You said it looks too simple to make a video of, but I guess I am too new to figure it out. I would bet that other newbee's are too...

[@GK1918]

again thank you for all the great work and as they say things do come to an end. Now it says I have to download this new flash player and when I do it says I dont have suficient privledges. so thats about it. When its too good to be true it usually is.

[@krazziee2000]

very nice

[@mrmatt2525able]

looks better than store bought

[@Metalloys]

Say Hello to Jordan from Egypt !

[@LarsBerntzon]

Nice, what about using a small machinist square, but the thick side against the site of the table, and the jigg resting to the thing side, then you can move the jigg true all the way.

[@DimaProk]

Just want to say, I watched many videos on youtube but I enjoy yours the most. You have a talent for teaching. I have a question, on the belt sander, what grit of sandpaper do you have? I was thinking of picking up a small one from Harbor Freight or Home Depot before now I have even more reason. I already have grinder.

[@mrpete222]

+Dima Prok I use either 80 or 100 grit. Perfect for general use, wood or metal. Thanks for watching

[@DimaProk]

+mrpete222 I got around to grinding first threading tool couple weeks ago from 1/4" blank and my "tilt" angle turned out to be much steeper at around 25 degrees (it's hard to measure). I was able to make test threads and it seems to be working fine, I made test cuts. Is there going to be a problem with angle like that?

[@mrpete222]

+Dima Prok No-that will work. Just a more delicate tool - tip may break off

[@xmachine7003]

@@DimaProk make sure you take shallower in feed cuts and traverse the thread a few more times. Tool will last if you do that. Good job trying. Keep at it.

[@andywander]

so you grind the tool with the 15 degree angles, which gives you front clearance-then you put it in a tool holder that tilts it up-doesn't that pretty much wipe out the clearance to teh front of the tool?

[@AsiAzzy]

Is it bad to lap the surfaces? I don't like coarse marks from the grinder, or sander. I usually grind the tool with a disc sander varying trough grits up to 2000grit that gives mirror like finish and add some lapping compound to a hard buffing wheel to make it a real mirror. (+nital) This is how I treat most cuts for microscope analysis on cracks, welds, etc so why not dress up the tools? For me it cuts fine the way I do it. Any reason not to smooth out the surfaces (without screwing them)?

[@walterbond3628]

I highly recommend if you're going to make a wooden toy chest for your grinder 2 make it in a box for him like a drawer without a bottom I need a script to your workbench course you'd have to use it like a miter saw II chop down your two side pieces for your uprights and then you would have put your table want it but I'd recommend plywood because it's cheap and you can find out a lot of places cuz not everyone's going to have Hardwood specials much as I have but that's because they tear down old buildings and I cut trees down for people that's probably why I'm going into Bushcraft and Woodcraft in all that detail work

[@gohuskies583]

@GK1918 I was having the same trouble using my I pad 2. I downloaded google chrome and am using it for you tube videos rather than safari.

[@tobyw9573]

Grinding various items is a great opportunity to see the various types of sparks that different steels make when ground and learn to identify them. But then Lyle says that later as I see. Good point on the green goggles that seal around the eyes, gently blowing off your face and hair gets rid of debris that could later fall into the eyes. Big danger from the sharp chips you get using a die grinder with a carbide burr and other cutters.

[@mrpete222]

👌👌

[@billherreid9661]

Thanks so much! I just ground a tool and it's more faceted than the hope diamond. Is this a problem for the function of the tool or is it just bad cosmetics?

[@mrpete222]

Probably just cosmetics. If it actually cuts, you did a good job

[@walterbond3628]

in my case it probably be easier to make it out of wood like a hardwood the table and The Jig cuz I've got a lot of wood on hand but not very much metal I mean I could cast some metal but it'd be easier for me to do would work with the skills and tools I've got and I've got a little bit of shop time with a grinder so it probably be easier with wood then I could make a more permanent gig you later of course it does take the 1st right hardwood and depends on how rough on him with it it might hold up enough for me to get enough tools out of it

[@ardvarkkkkk1]

There is a lot of difference between tool steel and high speed steel. HSS can get red hot and it will be fine when it is cool.

[@Srk7028]

what is the defference between single point cutting tool and thread cutting tool.is both same?I don't find end relief and side cutting edge angle in this video.

[@freemanfreed1581]

threading tool is the same as the chamfering tool except the 45 and 60 degree difference right ??

[@pco1984]

Download the flash player (usually an .exe file), right-click the file in the folder, then go to properties>compatibility. On the lowest end, there is "run as administrator". Check that box, and try again, this should be the problem as I understand it. To the uploader: thanks!

[@walterbond3628]

you can not put on a wooden arm on your grinder and take a finishing nail from the inside out of a tin can and punch the small hole the smallest it take to drip the water onto the tool that you're trying to grind and that will keep it cold keep it simple thermal dynamics keep it simple and you'll be more in tune to do more stuff with less and a Big Tomato can the tall ones is the best one I found the hold the most water you don't want to too small of a hole or too big of a hole happy mediums the best one you'll have to have several cans because you'll screw up with you but then if you need any amount of the pasta in a can or any herb pasta sauce that also will work it's just coded enough to so the water doesn't eat the can it will blister around the hole eventually but it takes so quite a while and what I mean by blessed remove rust improvise adapt and overcome that is the motto to we doing everything that I can't do with the tools on hand keep it the simplest method and you'll do the most with the least little amount of knowledge and tools and when you get the knowledge that's when you build a better tool that's part of improvise adapt and overcome hopefully if John is listening to my conversation because my phone's been hacked several times they're going to work out the better knowledge that's a little bit of Common Sense / crazy talk so really they need to work on what they sent us and what I mean by us I mean the United States and anyone else because the details will get out and that's where we need to work with and fix the problem in the drift is problem doing their reality and Ours their reality and Ours keep working keep it simple straightforward and you'll get your tool made anything for me again 2 Gunstock or just a wooden bench if you get the right knowledge and have a little bit of common sense to identify what is good about it and what is bad about it you'll get the right pulling down thank you for your videos

[@bullseye9899]

By the way any jig for grinding RH turning/facing tool? Thanks Again

[@bowlweevil4161]

why can't you tilt the grinder rest to the proper angle to get front relief?

[@j.pierce8786]

Nice video. I have appreciated you tool grinding series. For the threading tool, you don't seem to bother with compensating for the thread helix angle adjustment on the opposite two faces. Can you explain? Does this mean that the tool you grind in this video is equally useable for both left and right hand threads?

[@mrpete222]

+John Pierce Thanks for watching

[@chrisyboy666]

Internal threading tool has a more severe rake angle or chip breaker

[@firearmsstudent]

Hi Mr. Pete, if I just have a lathe, (no mill to make the jig) can I get one of those wheels, chuck it up in the lathe on its side, and use the tool post to hold the tool steel at the right angle? (Maybe rig up a water cooling device as well)

[@mrpete222]

+May the Schwarz be with you Thanks for watching. Probably not. Too dangerous plus the tool needs to be held at a compound angle

[@firearmsstudent]

Thanks for answering!

[@TrailBusterBrute1]

+May the Schwarz be with you Since the jig is aluminum, it is conceivable tht you could use a table saw or radial arm saw (better) to cut the grooves into the aluminum. Just use a carbide saw blade, set it for up to 1/4 inch depth and make a couple of passes to 1/4 inch. Kind of like a cheap horizontal mill, you know.

[@firearmsstudent]

Pretty cool, oddly enough I do have a radial arm saw.

[@yourserenity]

When I was 16 I made ANY THREAD ON ANY LATHE machine!

[@WonderTo]

Do you have any tricks to grind a radius-ed cutting tool?

[@Canon060009]

The angle you draw on the jig is 30 not 60. I used the protractor set as 150 degree to check the right angle.

[@walterbond3628]

here in America he can get anybody jumped off the side of the road that's where I'll recommend you get your Steel cuz you can break it down and make it into usable stuff and it was somebody else's garbage and with a little bit of knowledge you can maybe fix make some money oops I said a dirty word money what can keep being too serious kids will go crazy thank you for your videos

[@drmodestoesq]

Why isn't it a good idea to put a blank piece of high speed steel in the lathe tool holder.... and clamp a grinding disk into the lathe chuck.... and slowly bring the HSS into the grinder at a preset angle. Maybe someone has come up with the idea and I just haven't seen it.

[@marygage5494]

Is it possible to purchase your machine shop series on dvd? If so can you let me know the cost. Thank you and have a great day.

[@mrpete222]

No--only available on flash drive-way to many hours for dvds. You can also buy them on streaming video from my website www.mrpete222.com

[@73superglide62]

Is your table tilted?

[@mrc109]

Tool sharpening Freehand is pretty hard for this 60 year old "boy" as well. mrc109

[@TractorWrangler01]

mrc109 I made a wonderful jig that take all the human error out of it... and for some reason I still do it by hand. LOL Lazy? Perhaps a bit. But I find that just about the time I get upset enough to sharpen it is when I want it done quickly instead of dead nuts accurate because I want to get the job done. Suprisingly enough I put it in the jig after sometime and find that its so close that it seams like a waste of tooling to grind it to perfection... most of the time its because if you have the proper angles on it in the first place your really just dressing it up. The tool holder is really great though if your starting from scratch.

[@walterbond3628]

if you ever saw him steal all you have to do is We Heart It and all you have to do is get it up to Ware magnet on stick on it and then or water oil or water after non-magnetic temperatures is what you need before you switch it and either one of all the or water oil or water

[@tommybus65]

Walter... my friend... you really need to use some punctuation in your posts.

[@therealbullpeters]

every 16 year old boy just gave you the finger. He shakes a lot less than I do and he can actually see. :)

[@rcchopshop]

that tool might look abvious to a smart guy. but i would watch a video on how to make that tool over and over

[@katzefrau1]

i like your videos but i have to say i had no problem grinding tool bits when i was 16. that was 24 years ago i also happen to be a woman. so saying a 16 yo boy can't do it seems a little pessimistic, they can do what you teach them to do.

[@peterpessoni7404]

How to grind a tool bit to cut an acme thread Didu Rutland

[@JosephDAndrea0121]

He teaches high school shop part time.

[@shivashankarkotnani6943]

Can you they information in theoretically

[@ivan868]

Your grinder is very noisy, you need to replace the bearings and perform balancing the disk!

[@TractorWrangler01]

Rory Mcdonald Oh boy... It's not that bad yet Rory... Post a link to your perfect pedestal grinder Rory...

[@robbykanarr5133]

Im 13th and I can do it

[@josegonzalez-hn6xt]

-hoy es mañana-

[@TheWorldOfLouis]

"this is going to be close to impossible for a 16 year old boy" ... *is a 16 year old boy* .. great... still gonna make it though.