Toolgrinding: ID grooving tool

[@ThisOldTony]

nice work! and great visual at the end!

[@stefanknorr1226]

welcome back !

[@IBWatchinUrVids]

I wonder if Tony pokes his monitor too?

[@MJ-nb1qn]

What higher praise than TOT 👍🏼

[@StefanGotteswinter]

Welcome back my good sir! Thanks!

[@sicksixsicks]

I bet Tony would update Windows on his machine before he filmed it. Get on that Stefan. That aside, thanks to both of you for doing what you do.

[@vincei4252]

This Old Tony and Stefan on the same day? It must be Christmas!

[@Timboykee]

I'm beginning to think these two were separated at birth.

[@Andrew_Fernie]

You just stole my line !!! 😃

[@vincei4252]

@@Andrew_Fernie sorry

[@jimsvideos7201]

Gerolf and Quinn too!

[@ericg7044]

@@jimsvideos7201 And Clough42, and Abom. No Steve Summers video today though, and he usually uploads every Saturday morning. Hope he's alright.

[@bobuk5722]

Make your own broken end mills Stefan? Gave me a smile first thing this morning! Always a pleasure watching your brilliant demonstrations. I very much like your approach to life as well. It is uplifting. Bob.

[@michaelpiotrowicz6100]

The cut-away shot at the end was wonderful, the cut-away was good for clearing the chips too :)

[@donteeple6124]

Stefan, you ROCK !!!! Doesn't matter whether its a project or you just showing your regular normal stuff, you instill pride in precision, and excellence in craftsmanship. Keep it up.

[@roberttaylor2328]

My first viewing of your channel, very enjoyable. Me: 1959 year K.O. Lee Aberdeen T&C Grinder, brought home for my semi-retirement. Great content, subscribed!

[@CCCfeinman55]

Another short while immersed in complete fascination! I love fine, precision workmanship. My biggest forever unfulfilled dream is to have a machine shop. Why forever? ….well, my time on this globe is somewhat short. So I satisfy my yearning by watching you and several other clever folks on KZbin. Thanks for your contributions to the ever expanding knowledge pool in our little online world.

[@jdmccorful]

Ditto!!!

[@rootvalue]

Thank you for sharing your work. I know it adds labor to any process, but I appreciate the extra effort you go through for us. 🥳

[@misterfixit1952]

I appreciate you showing your thought process as you make these special cutting tools. The thing I like most about your channel is that even though you do professional, commercial work, you think like a DIY machinist. You don't spend absurd amounts of money on things like your spin fixture when a reasonably priced Chinese tool will do. Also, you don't mind making a tool, rather than spending big money on a ready-made equivalent. Throughout your history, on this 'channel, you have saved money buying quality used, and knockoff tools, and used those tools to make other tools. This is what most hobby machinists have to do to build up their home shop. It's no fun watching a professional shop drop big bucks on great tooling that I will never be able to afford. You demonstrate that ingenuity and affordable tools will let you accomplish anything your mind can conceive. On a practical note, I need to make a similar cutting tool to machine the inside features on an ATC conversion I am doing on a BT30 spindle for a CNC mill I'm working on. Thanks for the tips and inspiration. This is a perfect project for my new U3 tool grinder that you and Robin Renzetti inspired me to buy.

[@user-oy4lk7fd9w]

25:07 that footage is just beautiful, kudos for taking the time to do that.

[@artmckay6704]

Thank you, Stefan! We always miss you when you're not sharing a project with us. Love your stuff! Please keep em coming! :)

[@felixar90]

"Broken endmils, I make them myself" ah

[@scruffy3121]

Love it 😂

[@deemstyle]

The cut-away view at the end was really awesome. Thanks for sharing!

[@reinierwelgemoed8171]

You are by far my favourite You tube machinist. I learn so much from You. Thank You very much for the effort that goes into Your videos.

[@jasonh3109]

Amazing. As. Always. I really love how you break this all down into manageable pieces. Thank you!!!!

[@mattmanyam]

Thanks for letting us hang out, Stefan. I was going to comment about your camera shots even before the final strobe shot... You're spoiling us! I appreciate everything you show!

[@johnsmith-zs9jq]

Who knew you can make your own busted end mills. I'd like to see Tony try that!

[@StefanGotteswinter]

I think I stole that joke from Tony.

[@rameezsheikh7576]

@@StefanGotteswinter i see 😂

[@ianpendlebury9503]

Another fascinating demonstration plus excellent photography. Thanks.

[@TheUncleRuckus]

No way... This Old Tony, Abom79, The Post Apocalyptic Inventor and Stefan Gotteswinter all uploaded today, how did we get so lucky?! Best Day Ever! 😍👍👍 I like the little brass bar and lapping compound trick, I've never seen that before.

[@DubsnSubsSessions]

Another excellent mix of flat humour and metal working magic. Cool cut away at the end, I'm going to try that tomorrow and see if I can get it frozen.

[@Majiksmoke]

"I'm using the Deckel S1 tool and cutter grinder to cut off the ends of these broken carbide end mills.....I make those myself" 🤣😂 That line right there hit exceptionally close to home, and for that, I had to subscribe!

[@plattrap]

Darken the outside of the cutaway with black sharpen to improve the contrast between the inside an outside. Another nice effect to see with a stroboscope is the change in speed of the spindle when loaded by the cutter.

[@StefanGotteswinter]

Haha, darkening the cutaway section would almost make it look like a comic, good idea.

[@brucewilliams6292]

I am always in awe of your talents. The scene at the end showing the cutter in action with the stroboscopic effect was well done.

[@JustAnotherCraftsman]

The presentation of tool in action was absolutely stunning. There are a lot of channels overusing word amazing, but this was indeed amazing and clever idea.

[@johangroenewald6406]

I make the broken end mills myself………love the humor Stefan

[@bradthayer6782]

I love the combination of extreme precision and channel lock pliers. You make the difficult look deceptively easy.

[@robertdebusk6157]

Stefan, You never cease to amaze me with the level of detail you can achieve with your projects, or tools. Thank you for the look inside your world. Take Care and Stay Safe Bob

[@richardbradley961]

THANK YOU STEFAN LOVLEY CAMRA WORK. REGARDS RICHARD.

[@ShevillMathers]

Metal surgery in the workshop. Your precision work on such a small scale, makes the average machinist a ‘blacksmith’, on the scale of things. Don’t get me wrong, I admire all those precision machinists too. This is like me doing neurosurgery on a lab rat. Greetings from Tasmania Australia 🇦🇺.

[@TrPrecisionMachining]

very good job stefan

[@StefanGotteswinter]

Thanks!

[@kerkkonenahaima7322]

Not a very cheap guy for the viewers, first you made us all buy D-bit grinders and now have to invest for couple of other grinders😂. Some time ago I had to see what happened in a novel shape of a woodcutting circular saw teeth when chopping wood. I used a car ignition timing stroboscope synchronized with the blade. It was the scariest thing ever; the 5000rpm running blade seemed like a fully stand still item that magically took chips from the end of a 2x4". It worked quite fine with video camera too, regardless of the frame rate differences. Thanks for a great video again!

[@StefanGotteswinter]

Funny enough: All those grinders I have are not a replacement for the dbit grinder - I use every one of those machines on a very regular basis :) Good hint on the car ingnition stroboscope light, I will look into that.

[@BillyHardcase]

Great video my precision hero..

[@Ryan-dz3jo]

Thanks Stefan, love your work with the cut away and you have so much natural light in your grinding room! Looks fantastic.

[@captcarlos]

Thank you for another masterclass in making the tool. I find this aspect fascinating. 'I'll Be Back!'

[@JanBinnendijk]

I also make small boring bars and grooving tools, i use a cheap lathe with a diamond wheel..Works a treat.. Broken and Dull endmills are just "rough stock" for making lathe tools..

[@CreaseysWorkshop]

I made one of these a few weeks ago after I watched your earlier video about making boring bars from carbide. I wish I had known the brass lapping trick. That is next level stuff. I will try it next time for sure. Very useful video.

[@buildstoys]

The ending was awesome Stefan, you could have definitely "frozen" the rotation with a stroboscope (for example my Strobotac works on objects rotating up to 14,400 RPM).

[@buildstoys]

@zomgthisisawesomelol Yes, most Strobotacs will accept an external trigger. I'd recommend reading the Handbook of High Speed Photography (it's free online).

[@simonhopkins3867]

Eccentric work is always fascinating to me. But this is next level.

[@bartharkemametalworks2299]

Nice camera work and I like the reverse cup wheel trick. Havent got my Deckel S1 running but learning for your video's.

[@stumccabe]

Interesting little job. Thanks Stefan. Hasta la vista, baby!

[@iiredeye]

Beautiful work as always Stefan...Thanks for sharing.

[@SamEEE12]

I am a simple man, I see a Stefan Gotteswinter video; I smash the like button.

[@bobvines00]

Stefan, this is a wonderful video. And the almost-stroboscopic view of the tool cutting at the end shows how it cuts wonderfully! I look forward to you synching your camera/lights for future shots like this _and_ showing us the manufacture of the future "flux capacitor"(?) that you are making these cutting tools for!

[@MegaCountach]

Very helpful Stephan, thanks! Cheers, Doug

[@hartmutharwat2657]

echt super Stefan It is exiting to see to do this tooling where you can measure the single features with the groove of your tips,

[@mgbrv8]

“I’ll be back” best Stefan quote yet 👍🏻

[@mikemichelizzi2023]

Nice work and thanks for the cutaway demonstration! I also appreciate the advice to be able to walk away from a project if it's not turning out satisfactorily.

[@mumblbeebee6546]

That “X-ray vision” at the end is both clever and beautiful!

[@SPRlNK]

I like how you showed it cutting inside of the part at the end of the video. 👍

[@beatrute2677]

The shop I grew up in use to call those spin fixtures a spider box.

[@OakesProject]

What an awesome day. Thanks Stephan. Your content is always very interesting. Unless TOT releases a video on the same day just to compete with you . . . . . . . . . .Fight!!!!!!!

[@CraigLYoung]

Thanks for sharing 👍

[@dominic6634]

Use to use those tool cut grinders for jobs there tons of fun.

[@ImolaS3]

Love that final video of the cutting :)

[@Caughtitoutdoors]

You sir are awesome!

[@bulletproofpepper2]

Thanks for sharing! I have junked a lot of parts and fixtures but I also have made machines with hand tools to make better equipment to make better equipment. I have went from welding grade equipment to medium grade machest quality from making tractor parts. I find your video amazing!!

[@624Dudley]

Thanks, Stefan. That was superb.

[@godfreypoon5148]

5:19 I make those myself too!

[@FinnoUgricMachining]

I hope You liked making the video as much as I liked to watch it.

[@StefanGotteswinter]

Thanks! Yep! Making the videos is a nice distraction :-)

[@robertklein9190]

Plumber's pliers made in Burma, is Stefan shopping at Harbor Freight, Wow. I have the feeling that the projects he's working on have something to do with invading your body or mind. Nothing to do on a Saturday, let's spend all day grinding and video a small tool, but of course WE all appreciate the effort 10 fold.

[@MJ-nb1qn]

“Standing clueless at the grinder” should be a song title. Great video work. Thanks

[@frankward709]

Fantastic work Thanks for a very good video

[@guye7763]

Nailed it Vince! and Thanks Stefan.

[@TON_KROW]

I’ve always had to make my grooving tools narrower than the groove . And step over to get final width. But then again that’s how I had to do it in inconel 718. And I do it that way on everything out of habit

[@StefanGotteswinter]

Yikes, inconel - Gladly this one needed only to work in 1.4305 (303 stainless). If I had to do wider groves, I would definetly step over - this one was also on the edge of working properly with the small diameter starting bore and the large diameter groove.

[@HansFormerlyTraffer]

More beautiful machinery....Glad its in your hands. Who uses this stuff better?

[@bkoholliston]

Very cool, particularly the cut-away view. When you showed the CAD, I was thinking you would add the little chamfers on internal grooves shown in your model to your cutter, but I guess you would still have to deburr in the hole either way. Nice job! A strobe tied to the spindle would be easy--you need to sense the spindle position once per revolution with a Hall effect sensor or reed switch and magnet and then a variable delay from that trigger to fire a strobe (could be LEDs) at the right time to get your view. In other words, the frequency of the light pulse is one per revolution, but you need an adjustable phase offset from the trigger to the light. A 1000 rpm spindle is only 16.67 rev/sec so your strobe would fire at 16.67Hz, which is very achievable.

[@reiniertl]

Cutting the cut away was cool, even without stroboscopic effect. I would of putt it earlier in the video because it would certainly keep people watching for longer. Great work there.

[@ryanjordan4435]

Great content impressive vast and knowledge rich.

[@graemebrumfitt6668]

Soooo Satisfying Stefan! TFS, GB :)

[@suprafahrer6453]

Verdammt gut gemacht Stefan.

[@StefanGotteswinter]

Danke!

[@TomChame]

Very very neat, thanks.

[@evesdad8419]

Completely agree, thanks!

[@MachiningandMicrowaves]

The strobe effect would be easy enough to implement with a Hall sensor and a configurable delay to drive a powerful LED array light, so long as the rate was far enough from the shutter rate to prevent flickering. It would be even neater to phase-lock it so you could adjust the phase lag and have a sort of manually-adjustable rotation of the image. I can't think of a way to extract the frame rate from a phone camera or my ZV-1 to synchronise the lathe VFD frequency to the camera. Nice effect!

[@michaellinahan7740]

Stefan, like you I make more broken carbide than I care to admit to. Do you remember where you got the resin bonded diamond cut off wheel/ I have been looking for something like that for a while to cut them up. I did like the shot of the tool cutting the internal features, a bit like finding out you have xray vision!

[@StefanGotteswinter]

All my diamond wheels that i buy new these days are from a manufacturer in the Ukraine: pdt.tools/en/ The small wheel used there is from Winter and came with the S1 grinder.

[@2dividedby3equals666]

Thanks for the videos Stephan, I always learn a lot! I was wondering, how do you clock the cutting edge? 45º on the back and a pin or do you indicate it? Thanks again, take care!

[@AmateurRedneckWorkshop]

Very interesting thanks for the video.

[@Rustinox]

I don't know how you do it, but you always make it look easy to do. The normal things to do. To me this is pure art. Thanks for showing it. BTW, at 1:40 it shows 23°C on your PC. End of October? I suppose it's the result of global warming in Germany...

[@brucekoehler276]

You just enjoy the means and the ends. Thanks

[@lynnbryant9866]

Your last comment, "I'll be back." Diet Coke out of both nostrils! You got me! Hilarious. Thank you. I needed that laugh. Cleaning the keyboard, though, not so much. :)

[@Xlaxsauce]

The de-sync does make the cut look more interesting. Reality vs demonstration

[@jeromedumalin9954]

I imagine the use of a boring head in a conventional spindexer should work as well for certain diameters

[@StefanGotteswinter]

Yep, absolutely! Deckel even recommendet that in one of their technical manuals for the S1 grinder.

[@kevinrblodgett]

Fascinating combination of tools. I wonder how much could be done on the d-bit grinder?

[@StefanGotteswinter]

Thinking about it, all could be done, but it would take some serious mind-bending to reach all the clearance angles.

[@CockatoobirdmanBill]

Stefan the cut-away was was the best of all a strob will freeze the action but I like this, it has more class...Be well and be safe...............

[@666Tomato666]

Some cameras have a shutter that is selectable on a sub fractional basis (so you can shoot at something like 1/100.123 of a second), may be easier that getting a strobe hooked up to a lathe...

[@iteerrex8166]

If the frequency of the lighting (50hz in Europe), the rotational velocity of the spindle, and the frame rate of the camera, are integer multiple of one other, then that last bit would synchronize nicely. Thanks for the high quality videos Stefan.

[@StefanGotteswinter]

In this case I just indicated them on the top flat.

[@andrewwolf4430]

Just like Stefan I too make broken carbide end mills. The smaller the end mill the more I break

[@Adventure_Van_Upgrades]

"Welcome back to this old tool grinding shop" 😂😂😂

[@bigbird2100]

Great video 👍 Would grinding eccentric end to give clearance work rather than separate degree cuts for cut clearance etc.

[@mpetersen6]

I have no ida where the name came from but we always referred to the Harig as a Snake Box. have no idea just how many eccentric locating pins I ground over the years in order to bring parts back into spec on machining lines with 35 to 40 years worth of wear in the slides

[@StefanGotteswinter]

Neat! I have to say, the spin fixture is so much fun to use, and easy to get precise results :D

[@IdressAlokshe]

thank you

[@keithstone7930]

Stefan and Tony back on the same day! I feel faint…..

[@kentjohansson6937]

I make those myself :)

[@VirtualJMills]

Ditch == Document thoroughly, pack for preservation (corrosion prevention, etc…), and set-aside until another project calls for some of those custom parts.

[@WarGrade]

An adapted ignition strobe light might work for the final shots

[@Orgakoyd]

Very nice! I'm curious if you ceramic lapped the 15 degree clearance surface also?

[@CapeCodCNC]

Wicked cool!

[@anarcowhatever]

The Renzettiness is strong in this one

[@StefanGotteswinter]

So much to learn from the man :-)

[@anarcowhatever]

@@StefanGotteswinter I reckon it's too advanced for my current skills. I usually have to break down their videos into 10- 12 parts 😂 But you always pick up something from him.

[@brianrhubbard]

You are the definition of patience. LOL

[@ligius3]

You can set the computer network to 'metered' and you'll not be bothered about pesky windows updates again.And also no random reboots.

[@RaptorMachineToolCo]

Very Cool Stefan !!!

[@roguecnc788]

Very helpful, thank you