Slowspeed carbide grinder

[@davestambaugh7282]

I am retired today. I have worked in twenty five different small machine shops. Only one of them had one of these. They are amazing!

[@genecarden780]

17:27 Stefan:” oh I’m stupid” places a bushing over the shaft to locate it. It’s comforting to know even a talented genius can have a brain fart.🤣 Then I remember that his brain fart would have taken me 2 days to figure out. You are a wealth of knowledge,but more importantly you have a way of explaining things in a way that makes it easy for someone with VERY limited knowledge in this area( like me) to understand. Thank you for the time and effort you put into your videos.🙏

[@outsidescrewball]

4 years ago I watched/commented…just purchased an Accu-Finish unit on factory stand with wheels inc. ceramic….NOW your grinding discussion has assisted my learning of use!!!

[@dalejones4186]

Hi Stefan. Cobbled together to you is German precision to me. Your quest for perfection is impeccable. Thanks for sharing.

[@jimsvideos7201]

This was worth the watch for the bushing workaround to indicating that D-shaft alone.

[@stumccabe]

Nice little slow speed grinder. I love your solution to wheel changing - the magnets and drive pins is very elegant and simple. Thanks Stefan.

[@tuscanland]

A prolific mind with some very talented hands. Thank you for sharing your work.

[@andyZ3500s]

A very nice design Stefan. I always enjoy how you explain your projects. The do top notch work but the way you present it I feel like I can do that to instead of being intimidated.

[@AntiVaganza]

Very well said:)

[@sharkbaitsurfer]

There is just so much to love about this video, all sorts of question that I had percolating in my mind such as grinding speeds, tool cutting edge geometry and a whole host more were answered. Thank you Stefan for making such a thoroughly informative video.

[@shawnhuk]

I recently made a slow speed grinder/lap as well from a verrrrry similar looking motor that was from a fishing down rigger setup. I scraped in my whole lathe over the past couple months. I needed something to lap the scraper blades. I hobbled together the lap on a piece of sheet metal. I eBayed the same style diamond lapping plates, but 5”. But my lap wobbles all over because it has plastic bushings and guides on the shaft. I just needed it to work! You’ve given me some amazing ideas to build the unit into a permanent machine! As well, I had not considered the idea of dressing my lathe insert carbide tooling too! I’ve been struggling lately finding insert tooling that I like better than the small ccmt06 Chinese tooling I’ve always used on my 10” lathe, so I’ve wound up with a bunch of ccmt09, dcmt11, wnmg08, but I’m really not happy with the sizes and edge radius’s, my lathe struggles with some of them or they don’t cut nice because they’re Chinese junk, and I’m still learning! But now I can touch up the edges on the grinder and learn some more!. Great video!

[@colmboorman]

That looks mint. I love the magnet and plate design!

[@FinnoUgricMachining]

Exactly my tool. It is silent and slow,, is operated manually and does not throw dust flying around. At the last mile of the video I saw Your Weller soldering station. Using the wet sponge to wipe the tip of the soldering iron is what You usually do. However, it becomes ugly unless You rinse it every now and then. It is also dry every time You need it. I use fine steel wool instead. It has several advantages. It never dries and does not become ugly. It also does not cool down the soldering iron. I would use brass wool if that would be available but steel wool works almost as well. When the steel wool becomes saturated by stuff, just put in a new "pad" and throw the old into bin.

[@StefanGotteswinter]

I know about the brass wool and quite like it, we had it at work, when i was working in the electronics lab. But I am a bit to lazy to get some for my own shop, haha. Should do it at one point.

[@1pcfred]

A damp sponge was good enough for Weller so a damp sponge is good enough for me. I just keep a bottle of water near my station to wet the sponge. Been doing it that way for 40 years now. As far as steel wool goes my iron has a magnastat temperature controller so the steel wool sticks to the iron tip. That's a no go for me.

[@FinnoUgricMachining]

@@1pcfred That would make some angora joints ... I also have been using wet sponge ... maybe not 40 but rather 30 years with the Weller. You are right about magnastat. The last 10 years I have been soldering with my Metcal soldering station. Been using some 0.8 mm tips for tightest spots. Wet sponge will not clean that tip as it cools down too quickly.

[@1pcfred]

@@FinnoUgricMachining I only use a damp sponge. I guess wetting a sponge properly is a skill? And don't try to tell me what will not work. I used to hand assemble military communications electronics. The two supervising inspectors that stood behind me didn't have a problem with me using a sponge. I imagine they'd have put three back there but two was cramped as it was. What with each of them hovering over one of my shoulders like they were. Needless to say they were very particular about the work being done.

[@bruceanderson9461]

I have an accufinish and recently bought a bunch of diamond discs with the idea of removing the accufinish discs from the backing plate and glueing on new ones. Looks like a change of plans to magnets :) . Thank you for the video!

[@greglaroche1753]

I’m always amazed with your projects.

[@timmallard5360]

I like the drive pins combined with the magnet.

[@keithslayback4626]

I really like your quick change design thank you for very informative videos.

[@mcnultyfp]

Grindus ad Parnassum. My 4040 cnc is on the way, after watching your earlier demonstration. Everything you do is first rate, and a real goal for me. Thanks!

[@etprecisionmachine2379]

Greetings Stefan, I have been using slow speed carbide grinders since 1979. Because I can no longer get the diamond wheels made for my machine I use the same diamond discs that you do. I have found that do not need anything more that the original two alnico magnets on my Leonard Lap grinder to hold the discs inland and to transmit the torque. Just the friction of the disc against the aluminum plate works fine. But of course it does because that's how the original machine was designed. Great video though and inspires me to make another machine: so that I don't need to change discs when roughing and then finishing the carbide. Eric

[@Orgakoyd]

I'm interested in what turned you onto the slow speed grinder those years ago? The Leonard is a really nice machine. I'm trying to make a slow ceramic lapping machine using a 8 pole induction motor and a VFD to run a 12 inch ceramic lap at around 250 RPM, using the motor shaft directly to drive the lap and also as the spindle.

[@etprecisionmachine2379]

@@Orgakoyd I worked in a machine shop that had one. That was over 40 years ago. Eric

[@Orgakoyd]

@@etprecisionmachine2379 Thanks!

[@thedude6736]

Guten Abend, Mr. Gotteswinter! Thanks for ending my weekend with some good content!

[@charlieromeo7663]

No telling how many of these will be built after seeing this video. Great job Stefan.

[@1pcfred]

Where are you going to get that gear motor from?

[@tombellus8986]

Nice design and thanks I think I have all the parts needed in my spare material box. Now I need one!!!!

[@claudefournier9341]

Very nice project, I enjoyed watching it. While you were machining the disk for the wheels you mentioned the copper plate and wondered why?. In tool making when making a component requiring certain areas to be carburized and hardened. We machined the part slightly over size (.005 to .010) then had it copper plated. After copper plating you machined the copper off the areas you wanted carburized and hardened, after hardening the copper plated areas are machined to final requirements and the hardened areas ground. I am sure you guys can figure out the possibilities of this procedure.

[@rootvalue]

I love, love, love the shop tooling and mechanical engineering you do. Thanks for sharing.

[@mdhebert]

I love how your builds are so thoroughly thought out. I learn a lot from these, so thanks.

[@bostedtap8399]

Excellent concept and design Stefan, very clever using the magnetic fixing with the mostly non-magnetic Carbide. Thanks for sharing.

[@erik....]

That's a reasonably nice grinder, thanks for sharing!

[@billchiasson2019]

Very ingenious! And very well planned and thought out, great job!.

[@pablogamba1651]

Nice ! Now I kind of want to look for a scrap yard to find a windshield wiper to make my own!,, thanks for sharing your knowledge Stefan👍

[@peterblake548]

The ceramic disc is a Buchner filter for a Buchner funnel

[@paulmanhart4481]

This is great. I’d love to see the plans for this little miracle. I have a 24 VDC variable speed motor that goes from 0 to about 200 rpm. I think it would work well for this. Thanks for sharing.

[@thatoldbob7956]

Hi, this comment is not only for the present but it’s in general. I was forced to take it easy so I had the time to watch great many of your terrific videos. I thank you, I saw many tools what I would not knew about and got many good ideas, but I am really old and I will not be able to use them. Your précision is admirable, though I can’t understand that you spent so much time and energy to fix and protect to your lathe, then you bought another one. I really liked that tail-stock. Thanks again, great work, please tell to watch.

[@DanG-ug1ed]

GREAT!. My only suggestion is to make the table mount lower, so you can mount an end mill in a collet block and have room for it on the grinder.

[@sandersn4]

Alumina ceramic wafer insulation 100x8mm on eBay. Also 2mm thick.

[@I2YANx]

Thanks

[@johnswilley6764]

Stefan, thank you Sir, very interesting presentation. I have an early Accufinish which has no table; perhaps now I'll have the motivation to make one. Thanks again. From Orlando, Florida, U.S.A.

[@TomChame]

Super job on the fabrication!! Well done

[@gilberttwaterfield6389]

Well done sir it is nice to see that you take the time to calculate and to produce parts so that everything is safe and well thought of it would be a pleasure to work with you as you would make a great teacher

[@klaasbloem]

Great build Stefan, thanks for sharing with us!

[@paulgreenlee190]

Great Video, enjoyed how simply you made it look, hard to ask questions when it's all right there in front of you, Thanks

[@MoraFermi]

That ceramic disk looks like a vacuum filter insert! These are used in chemical labs. Sadly the only ones I know of are stupid expensive... :-/ P.S. Of course the usual Chinese sites have them for $0.5 a pop, if you wait 1-2 months for delivery.

[@SneerfulWizard]

Great idea and video Stefan. Gotta say im impressed with the quality and turnaround time from first seen on Instagram to now 👍

[@bcbloc02]

Nice little lapping machine. You could have had a double pivot on your table supports without much trouble so you could have had an adjustment for how close the pivot is.

[@StefanGotteswinter]

Thanks! Yes, that would be a good, easy solution :)

[@outsidescrewball]

Enjoyed....super discussion/demonstration/build.....lots of subtle build tips ....thanks for sharing...

[@scottmuller1901]

Great video! I’m defiantly copying this one. I turned a disk and mount in my lathe with a rest that slides in the tool post. But you always seem to have to use them at the same time!

[@priority2]

Elegantly simple design! I’ve learned so much from watching your channel. Thanks 😊

[@paradiselost9946]

i found 3x 3kg pot magnets are sufficient. recess em into the plate, turn the face up to about 0.25mm from the pot faces, and its enough to drive without slipping, yet easy enough to pop them off. no drive pins to drill. was going to backfill with epoxy first but yeah... whatever. bit of blutac removes any occasional swarth. then sit the bottom half of the disc in a tub with kero or wd40 etc... keep them clean and wet and they cut so damn quick...

[@strangefruit8776]

I like how you aren’t a chicken when it comes to setups and you know what will work to get it done.

[@ianpendlebury3704]

An excellent project - this is what you really excel at. Thanks for sharing with us.

[@johnhall8455]

You can use double sided tape instead of superglue between the masking tapes..👍 I would also extend the table around the sides of the wheel, so the tool to be sharpened can easily be placed at 90 degrees to the front face if the wheel.. Looks very much like a car wiper motor…nice work..

[@tmurray1972]

Having the cad and the 3d printer the possibilities are endless...lol. I can only imagine when you acquire a metal printer.👊🏻👌💯

[@arnljotseem8794]

Very nice build, and some very smart solutions.

[@erikpeterson1989]

A fascinating build, as usual. Thanks!

[@nicholasfranks2616]

Holy shit , your my hero , simple magnet and pins drive solution is brilliant. Keep up the go work

[@gearloose703]

To think of it, window wiper motors are rated for 100% as well, but only for some hundreds of hours. I would give one a try.

[@63256325N]

Very well built! Thanks for the video.

[@isabellaman2545]

Wicked 👍👍 just love your thinking Stefan

[@larryblount3358]

Well done giving credit to fellow you tuber's. Very informative video on both grinding, design and build.

[@kurtkrause7151]

Very nice design Stefan. Cool build as well. I'm gonna try one.

[@simonhopkins3867]

Awesome thank you very much for sharing your knowledge and this build. 👍🏻

[@joed2392]

Hi Stefan, When it comes to Innovation !! YOU DA MAN !!!

[@CraigsWorkshop]

Nice design Stefan. Much more interesting than an off-the-shelf model. Thanks for sharing your methods and tips. I always learn something. Cheers, Craig

[@ROBRENZ]

Nicely done Stefan! I may have to copy that. ATB, Robin

[@TheRalliowiec]

And so the master becomes the apprentice!

[@warrenjones744]

I was thinking the same thing Robin, Much nicer than my modified Jet wood tool sharpening thingy I made. Very nice Stefan

[@StefanGotteswinter]

Thanks Robin! I guess it would be a very nice addition to your ceramic lap that you already have.

[@literoadie3502]

Warren Jones Could you tell me which Jet wood tool sharpener you used please? I’m trying to get an idea of what I can buy to adapt.

[@literoadie3502]

Warren Jones Thanks for the link. We have equivalents of that jet grinder in the UK. I did think of going with one of those, but I’m deciding to buy one of the cheaper worm drive wet grinders, as I think the worm drive will be a handy feature.

[@davidl.579]

Bearing revelation. , GOLD!

[@bookerol]

Wow, that looks like a power window motor off an older Ford, except for being 24v. Next window regulator I replace, I'm saving the motor to make one of these. Good idea Stefan!.

[@rootvalue]

bookerol I could be wrong but I don’t believe window motors are rated for continuous duty. Worth a shot anyway. The Post Apocalyptic Inventor found some uses for them-check his vids out!

[@mattmanyam]

@@adrian_r you could even grind... Intermittently! (I'll see myself out.)

[@2lefThumbs]

Some great design features, thanks👍👍

[@chrismate2805]

Excellent job, thanks for showing.

[@MegaCountach]

Very interesting Stephan, nice job, cheers, Doug

[@ianbertenshaw4350]

Fantastic little tool you have built there Stefan! I could really use something like that in my workshop not only for carbide but HSS tools and i have a few worm and planetary drive motors here somewhere that could fit the bill - look out junk box here i come !

[@ydonl]

You cut dry at times where I would might expect lubricant. Would you consider a video talking about lubricants in general? When and why, why not? Maybe other fluids, too?

[@StefanGotteswinter]

Hmm, probably a good idea - Shop chemicals.

[@2lefThumbs]

Stefan is shy of discussing lubricants after the "whale oil" (way-oil) scandal of 2017

[@ydonl]

@@2lefThumbs I would expect no ways to be harmed in the making of the video!

[@2lefThumbs]

@@ydonl haha😆

[@MabrayFarm]

Nice project, I would like to have one just to radius lathe tools. Thanks for the video !

[@hermankrijnen6409]

Stefan, you always promote the use of particle suction when grinding carbide materials. Do you have any suction on this machine, or is it not necessary with low speed grinding. Magnificient little machine. What is the particle size of your grinding discs? Look forward to your reaction.

[@gyrogearloose1345]

Brilliant. I am collecting ideas for grinding rests and so on. Lots of good stuff here. Always a pleasure to see a master at work. Question: why slow speed for this type of diamond disc? Currently I am trying out a 120mm bonded diamond saucer wheel. Amazing to see it cut through carbide at about 3000 rpm! Many thanks Mr G!

[@unpopular_mechanics]

Check out heat-set threaded inserts for adding threads to 3d printed parts.

[@kellerrobert80]

I always leave post-sale comments on eBay, and that comment includes the description of the produce, sometimes including part number. This way, months or years later I can do a simple search and the seller name, description and such pop up. eBay stores all your comments going back 20+ years. Makes re-ordering hard-to-find and hard-to-remember items easy-peasy-lemon-squeezy.

[@Rustinox]

You have useful things in your scrap bin. I wish i had a bin like that.

[@StefanGotteswinter]

Well, the only crazy thing was the motor and possibly the power supply. The diamond wheel was bought some time ago for a relatively similar project.

[@bclare2544]

Another great idea Stefan.

[@tomk3732]

Tripan tool holder! I found a whole set in Canada and I am trying to sell these but they are so rare that it is hard time finding anyone that uses them. They seem very high quality. Too bad I only have tool holders and no tool post.

[@curtisvonepp4335]

Stefan that tool is really a 💰💰💰 saver dressing incerts and other things .🙌

[@pgs8597]

G’day Stefan, for something you slapped together quickly it’s very well done. Cheers Peter

[@walterg4025]

Excellent work! I like your design better than the AccuFinish model.

[@coryknipe5471]

Excellent idea. Where di you get the discs if you don't mind me asking? Thanks

[@francodessanai6174]

Hi Stefan, I always look at your videos and works with admiration and I congratulate you. I would suggest you to include in the description also the sources from which you purchase the materials and the tools, specifically the diamond disc you mounted on the plateau and the characteristics of the gear motor (power, rpm, etc.). I thank you and greet you

[@GavinFreedomLover]

Nice work brother!!

[@sampitts7044]

Another great video 👍 thanks Stefan

[@vincei4252]

Very cool, Stefan.

[@burntorangeak]

Hi Stefan. Have you spent much time in the US? I've noticed over time that you have a pretty solid handle on our slang terms.

[@DrunkenGamer666]

have you ever heard of youtube? You can pick up a lot of stuff from there.. for example, I have nothing to do with machining and what not.. yet here I am watching people doing stuff like that and I kind of want to buy a lathe now

[@StefanGotteswinter]

I have never been to an english speeking country.

[@2lefThumbs]

@@StefanGotteswinter not even the UK? Quick, do it while it's easy! :)

[@vincei4252]

@@StefanGotteswinter I was in Berlin mid October. As we were coming in to land I thought how cool it would be to meet you. Maybe on my next trip to Germany :-)

[@bobolander]

@@StefanGotteswinter wow. must be too much TV and too many movies...your command of English vernacular is impressive.

[@brianwalk108]

you sir are a genius

[@wktodd]

Damn Stefan , that's another project I'll have to make (already have a couple of diamond discs) :-) Love the mag mounting.

[@andrewdolinskiatcarpathian]

Brilliant design 👌👏👏👍😀

[@gbowne1]

really nice design! I like that

[@gbowne1]

Stephan I might have to look into this one. The other designs I have seen are very expensive for what they are.

[@iiredeye]

Superb project Stefan. I wonder if you considered adding an adjustable plate to the tool rest? I was thinking of a second plate on top with slots in the bottom plate and a thread in the top plate so you can minimize the gap with your grinding wheel.

[@tinker5349]

Hi Stefan, an interesting machine and both machine and video are very well made .

[@Roelasia]

nice and simple done, I can get the diamond steel disks fairly easy !!! 38 to 3000 grit !!

[@tyhuffman5447]

Great idea, and manufacture.

[@audiokees4045]

THat motor is also used in car window cleaners. Is easely usable.

[@OldtimeIronman]

LOVE this video, I wish I had thought of doing this! Thanks!

[@CatNolara]

That looks like a pretty neat project, I still have some motors like that, maybe I will copy this :)

[@wolfitirol8347]

Very interesting comes at my list of future projects ...i have very good experiences with things building that you showed us because they all became successful projects 😂😇👍

[@paulmanhart4481]

Would be nice to be able to set the yaw angle of your holding device so you don’t have to eyeball it. Any thoughts on this?

[@romo4301]

Tolles Projekt und super Video! Kipp Hebel eignen sich wunderbar um verstellbare Verbindungen zu erstellen. Kipp ist nur ca. 4 km von mir entfernt. Gruß Robin

[@StefanGotteswinter]

Danke! Entsprechende Griffe sind schon bestellt, gibt ja nichts praktischeres :)

[@keithnicklin8819]

What about a spring loaded button in the reverse of the backplate to flirt the grinding disc off.

[@StefanGotteswinter]

Would be a possibility, right. For now, I will leave the screwdriver close to it ;)