Slowspeed carbide grinder
ฝัง
- เผยแพร่เมื่อ 23 พ.ย. 2024
- Built a slow speed grinder that has the same working principle as a AccuFinish grinder.
Also check out Dale Derrys slow speed grinder:
Part1: • How to Make a Slow Spe...
Part2: • How to sharpen carbide...
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gtwr.de/
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#practitioner_of_the_mechanical_arts
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!
This was worth the watch for the bushing workaround to indicating that D-shaft alone.
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!!!
Nice little slow speed grinder. I love your solution to wheel changing - the magnets and drive pins is very elegant and simple. Thanks Stefan.
Hi Stefan. Cobbled together to you is German precision to me. Your quest for perfection is impeccable. Thanks for sharing.
A prolific mind with some very talented hands. Thank you for sharing your work.
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.
Very well said:)
I like the drive pins combined with the magnet.
That looks mint. I love the magnet and plate design!
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!
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.🙏
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!
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!
I love how your builds are so thoroughly thought out. I learn a lot from these, so thanks.
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.
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.
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.
@@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.
@@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.
Excellent concept and design Stefan, very clever using the magnetic fixing with the mostly non-magnetic Carbide.
Thanks for sharing.
The ceramic disc is a Buchner filter for a Buchner funnel
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👍
I love, love, love the shop tooling and mechanical engineering you do. Thanks for sharing.
Guten Abend, Mr. Gotteswinter! Thanks for ending my weekend with some good content!
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.
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!
I’m always amazed with your projects.
Very ingenious! And very well planned and thought out, great job!.
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.
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.
No telling how many of these will be built after seeing this video. Great job Stefan.
Where are you going to get that gear motor from?
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
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.
@@Orgakoyd
I worked in a machine shop that had one. That was over 40 years ago.
Eric
@@etprecisionmachine2379 Thanks!
That's a reasonably nice grinder, thanks for sharing!
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.
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.
I really like your quick change design thank you for very informative videos.
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
I like how you aren’t a chicken when it comes to setups and you know what will work to get it done.
Nice design and thanks
I think I have all the parts
needed in my spare material
box. Now I need one!!!!
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.
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.
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.
Great Video, enjoyed how simply you made it look, hard to ask questions when it's all right there in front of you, Thanks
Great build Stefan, thanks for sharing with us!
Great idea and video Stefan. Gotta say im impressed with the quality and turnaround time from first seen on Instagram to now 👍
Check out heat-set threaded inserts for adding threads to 3d printed parts.
An excellent project - this is what you really excel at. Thanks for sharing with us.
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.
Thanks! Yes, that would be a good, easy solution :)
Super job on the fabrication!! Well done
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 !
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
Enjoyed....super discussion/demonstration/build.....lots of subtle build tips ....thanks for sharing...
Nice project, I would like to have one just to radius lathe tools. Thanks for the video !
Holy shit , your my hero , simple magnet and pins drive solution is brilliant. Keep up the go work
Excellent idea. Where di you get the discs if you don't mind me asking? Thanks
Elegantly simple design! I’ve learned so much from watching your channel. Thanks 😊
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.
Having the cad and the 3d printer the possibilities are endless...lol. I can only imagine when you acquire a metal printer.👊🏻👌💯
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?
Hmm, probably a good idea - Shop chemicals.
Stefan is shy of discussing lubricants after the "whale oil" (way-oil) scandal of 2017
@@2lefThumbs I would expect no ways to be harmed in the making of the video!
@@ydonl haha😆
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!
A fascinating build, as usual. Thanks!
Alumina ceramic wafer insulation 100x8mm on eBay. Also 2mm thick.
Thanks
Well done giving credit to fellow you tuber's. Very informative video on both grinding, design and build.
Very nice build, and some very smart solutions.
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...
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?
Bearing revelation. , GOLD!
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..
Hey Stefan. Great job... quick question - have the magnets been causing issues with collecting magnetic swarf? Cheers!
Wicked 👍👍 just love your thinking Stefan
Nicely done Stefan! I may have to copy that.
ATB, Robin
And so the master becomes the apprentice!
I was thinking the same thing Robin, Much nicer than my modified Jet wood tool sharpening thingy I made. Very nice Stefan
Thanks Robin! I guess it would be a very nice addition to your ceramic lap that you already have.
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.
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.
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.
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
I have never been to an english speeking country.
@@StefanGotteswinter not even the UK? Quick, do it while it's easy! :)
@@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 :-)
@@StefanGotteswinter wow. must be too much TV and too many movies...your command of English vernacular is impressive.
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.
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
Very nice design Stefan. Cool build as well. I'm gonna try one.
What about a spring loaded button in the reverse of the backplate to flirt the grinding disc off.
Would be a possibility, right. For now, I will leave the screwdriver close to it ;)
You have useful things in your scrap bin. I wish i had a bin like that.
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.
Very well built!
Thanks for the video.
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!.
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!
@@adrian_r you could even grind... Intermittently!
(I'll see myself out.)
Very interesting Stephan, nice job, cheers, Doug
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.
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.
Hi Stefan, When it comes to Innovation !! YOU DA MAN !!!
Some great design features, thanks👍👍
Stefan that tool is really a 💰💰💰 saver dressing incerts and other things .🙌
That looks like a pretty neat project, I still have some motors like that, maybe I will copy this :)
Awesome thank you very much for sharing your knowledge and this build. 👍🏻
A brilliant project Stefan. Do you think a 12 car windscreen wiper motor and gearbox would do duty for this? After all it must be designed to run at leat80 percent duty and the gears should be strong enough as they are driving two up to 600 mm wiper arms with quite a bit of friction on them.
G’day Stefan, for something you slapped together quickly it’s very well done.
Cheers
Peter
Great job Stefan. It would have been useful to convey the collection of grinding in liquid to avoid dispersion of tungsten carbides in the air which are very dangerous for health. The disc locking system with magnet and pins is excellent. Where did you get that thin diamond disc?
Circular plates look like hard drive disks. Wonder if those could be charged?
Harddrive discs come in aluminium or some sort of glass, both with coating. Both not realy ideal ;)
How many watts is your motor or amps. Nice design I will have to make one. Thanks Stefan for sharing.
Thanks Randy - Good question: It pulls about 600mA at 24V without load. I have no real specs on that motor, it has no plate on it.
@@StefanGotteswinter From what I can find this is: SWF VALEO NIDEC ITT 403.568 gear motor 24 V DC Typ:SWMK
Rated voltage: 24 V DC
Idling speed: 280rpm
Rated torque: 1 Nm
Gearing: left side, bolt hole circle 50.8 mm, hole centre distance 43.5 mm
Shaft diameter: 10 mm
Shaft length: 33 mm
Round shaft flattened on one side (W159)
Type: SWMK
Unfotunatly, look like this is some old series motor, I couldn't find any other data.
Any idea from which truck/bus it came?
Damn Stefan , that's another project I'll have to make (already have a couple of diamond discs) :-)
Love the mag mounting.
Nice work brother!!
Excellent job, thanks for showing.
To my understanding, this is grinding but not lapping. Lapping is acually done by using an abrasive paste, while grinding uses solid abrasives, which is fixed to the grinding material.
If you disagree, I will be grateful to hearing you opinion on this topic.
Awesome build
Out of interest: do you need to wear a mask? Does it produce airborne carbide dust?
If used dry, I would reccomend a mask. As for all grinding.
what grit #number for the grinder wheel?. thanks for the video
LOVE this video, I wish I had thought of doing this! Thanks!
Another great idea Stefan.
Hi Stefan, an interesting machine and both machine and video are very well made .
Hi Stefan, I am planning to build something similar with yours and I need to know what the ultimate RPM for these disks is. Thanks in advance.
it needs a protractor/ rail thing to set the angle. Like th acufinish does.
I do that with a portable digital protractor and that seems pretty popular.
if your rail angle is set slightly different to the grind angle, then it will take hours to lap it back to match the rail angle. So there is probably no point.
@@rhysd5410 With the wheel off you contact your tool edge and then float in the rail. You don't actually use the rail to set the angle unless you're just doing something rough.
could check out the table design from a Worden T&C grinder.
For a more elaborate version I would do that - But I wanted/needed to get it done in reasonable time to get back to paying work ;)
Currently I can quickly clamp a straightedge to the table, if i need a fence.
Hi
Thanks for the video
Have you by any chance discussed speed and feeds for small end mills on the Cnc
I have a Haas office mill which has a spindle speed of 30000 rpm
I do not get a long life with the end mills that I use
The information supplied by the manufacturer does not seem to help with very small end mills and gauge plate
Thanks Douglas