A Tiny tool grinder part V, Finale
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- Опубликовано: 8 май 2023
- This is the final test video in this series. I sharpen scissors, a wood chisel, a parting tool, a scriber, a large and a small drill, a two flute end mill and make a d-bit. If you have any questions, remarks, I invite you to let me know in the comments.
Maybe, if there is much viewers interest in this project, I will make a new video with drawings and some detailed explanation and tips.
No music this time... Brian had too much to say. I'll make it up next video. 
Наука
I have now received a great offer from a friendly RUclipsr. He is willing to make drawings of my Tiny Toolgrinder! So, if all goes well, a video will be released soon with drawings and some detailed information about the construction.
Superb little machine, very nicely done. 😊
Very impressive series, covering a lot of ground, an inspiration for me - thank you very much !! As with many others, I’d love to see any sort of drawings you could share !
Yes, I am interested in a drawing, even if it crude.
The screw-cutting tool problem isn't clearance angle but helix angle.
A shallow fine thread has lower helix angle, deep coarse thread a much more pronounced helix angle.
If you look at tool 'head on' you need a 3~5 degree 'lean' in direction of thread (the helix angle)
Your estimation of eight degrees would probably be fine for the thread you cut but you also remove three degrees from the 'trailing' side of tool so only a 2~3 degree clearance angle is needed.
When I was training in mid 1970's, out instructor went a bit nuts drumming 'helix, helix, helix' into us then made us cut a 1" Whitworth thread (8 TPI, 55 degree thread angle, 0.080" deep)
Helix angle even more important when your moving more than 3mm per revolution of work (0.125"/rev)
Grinding tool to enable right and left threads to be cut made it quite weak so we made left and right tools.
It's the only time I ever cut a 1" Whitworth thread but never forgot helix angles 😁
might be a good idea to add a hose fixture for vacuum, carbide dust is not super healthy. The tool grinder is amazing, well done. You should build and sell these if there's enough interest. I'd buy one :)
Excellent work! Definitely interested in drawings for this. Thank you!
If there is enough interest I will make a video with the dimensional sketches
One item I thought of was possibly a quick vise method of grabbing and releasing the collets. Like a preset clamp that only needs it's throw broken loose to adjust clamped material. Fantastic build.
Drawings for this would be great, it’s a work of art !
Thank you!
Yes, I know, drawings of this machine are in demand. I'll see if I can find the extra time to produce some sketches. Not complete working drawings, but more the main lines and important dimensions, provided with comments that a builder can use to adjust things themselves if desired.
Great work on this series. We shared this video (alongside all the other ones) on our homemade tools forum this week 😎
I am interested in drawings to.
Nice work.
I Want One ...and I don't even have a shop!!! Very versatile well thought out grinding machine!
LOL!
REally great work. Yes please can you supply drawings?
Very impressive Michel. I do like the design very much. All my work is on a much larger scale, however I can certainly appreciate the machinists who works small, it can be very challenging. Cheers
Great job and great presentation.
Plans would be good.
Looks great Michel, I'd love to build one for myself.
Very interesting result. Thanks for sharing. Drawings always are appreciated!!
Those are terrific results Michel, Congrats!!
As always one of the first to comment. Thank you Colin
Excellent work! I'm impressed and lining up for the drawings.
If drawings where available we could perhaps contribute with parts and features to this marvellous creation.
Love to see it continue to grow.
Thanks for sharing your work with us!
I received an offer from a very friendly RUclipsr to make working drawings for me. If all goes well, I'll make them available for free in an upcoming video.
@@Michel-Uphoff Thank you so much
@@Michel-Uphoffvery cool! Hope to see them soon as I just started building my grinder.
An excellent project well executed.
Please provide prints. When available please notify us and the charge to obtain them prints are always appreciated no matter how crude. Especially if a pdf download is available. Thanks very much for sharing your knowledge and time with us thru your videos
If I make working drawings, they will become available at no cost.
Amazing!
There was nothing wrong with your voice Michel. A great job here. BTW.
Eccentric Engineering has an Acute Sharpening System that is worth looking at.
He has kits to build or finished systems. Love your work.
It's the artificial voice of Brian. Nice tip, thank you! I paid them a visit. Looks good, but it doesn't seem really stable / rigid to me. And a bench grinder is needed which is way too big for me.
very nice ! i would be interested in drawing if you decide to make them available
like the tool you use for setting toolheight , nice and simple and probably eazier to spot than holding it up against the center of the eehr life center
truily interested in the drawings , like i said before this machine is more usefull for less money than a d bit grinder , and maibe you can make the toolholder measuring part so it can be put in place of a toolrest on a good stationairy grinder , be a bit harder to make it fit universally though and probably be a bit more limmited to wat you could do with it
the daimond wheel changer would be a good idea , i seen those on surface grinders these have a cone and drawbar , could probably make one using the machine itself to center and taper for the arbours perfectly once you have rough machined it using the shaft and tread you have on it now basicly use the little grinder like a tiny lathe
since you have the grinder itself on a slide you might be able to build a base for it so it can be used as a toolpost grinder too (be too high for the verry small lathe to bolt it straight up on the crosslide you have unless you hang it on sideways sticking out way in front of the quick change toolpost) or make another way shorter base post for the grinder
Very nIce build Michel! I have a few extra ideas 😊. First I think the thread cutting tool should have a minute radius on the tip of the tool to reduce stress in the neck of the thread. For e.g. M6 it should be a 0,144 mm radius. Next I would add a place, or several, for an indicator to stand to repeat cutting positions on a endmill or drill more precise. But you know "de beste stuurlui staan altijd aan wal" Hartelijke groet, Job
Hi Job! Thanks!
Yes, every thread should have a radius at the root. The problem is that it differs per thread pitch. For this 2 mm pitch it should be around 0.3 mm.
But I must confess that I sometimes sin against that, moving the toolpost a tenth of a mm or so back and forth to make a flat bottom in the thread as a stress relieve and also to cut only one flank at a time.
But now I can grind decent tools I am planning to grind 3 thread cutters, with 0.05, 0.1 and 0.2 mm radius, so I can roughly cover all pitches from 0.25 to 2.0 mm. That should suffice I think.
I have a few indicators and magnetic bases that I can use. Actually, I didn't thought of this until now, and I will test the repeatability in de coming days. So thanks!
"Hele goede kapiteins staan ook wel eens aan de zijlijn en geven je prima tips" (Bijna vergeten heel oude Chinese zegswijze)
Good lock siavash from iran.
Michel, thank you for taking the time to video your build of this Tiny Tool Grinder, very professional, and everything is well explained. I have sent you a email from huntnfish let me know what you think Regards Dave...Beagles.
Hi Dave. I will contact you by email.
Regards,
Michel
It must be most satisfying to build and use your own tools especially one as complex as your grinder. I only managed a scriber so far but from little acorns.
Acorns? I'm afraid I don't understand this..
@@Michel-Uphoff
'Acorns' to Oaks = From little things, big things grow.
English idioms are a world of their own. .....
@rodbutler9864
Aah! Thanks!
I know that English has a lot of expressions, just like Dutch, but I didn't know this one yet (amongst many, many others) .
Sometimes we joke here that if we were to have a conversation with a foreigner, based solely on Dutch sayings, expressions, and proverbs, (which is quite possible, there is a site that claims they collected 20 thousand Dutch sayings etc) the listener would be convinced that either we really didn't speak Dutch at all or that we belonged in a mental institution .
❤😮Super
Hello Michel, the best I ever seen. Can you send us a video with drawings and dimension or do you have print plans? It would be geat to have them to build your machine
by us.
Thank You
I got an offer from a very friendly and helpful viewer to make cad drawings for me. He's not in a hurry, so probably it will take some time. When I have them, I will make a followup video with drawings.🙂
@@Michel-Uphoff Thank You. I can draw it too for you. I have solidworks here and can draw for you if you like
I will keep this in mind. Thank you!
Very nice job and entertaining video! Useful device for the model engineer workshop. I'm just not sure to have fully understood your approach to grind d-bits. Also interested by drawings.
If there is enough interest I will make a video with the dimensional sketches
What part of the making of the d-bit is not clear enough?
Really nice project, i'm making somethign similiar
OK! Do you have plans to publish a video?
@@Michel-Uphoff I may do. i have lots of decisions to make on the design first though. I had planned to go with a much larger machine than yours with a 6" wheel, but you manage to do lathe tools perfectly well on that one which is my primary intended use so maybe that's not nessassery
@@Sigmatechnica If that's the focus, then the maximum size of your tool bits could be a good reference for the dimensions. My toolbits are max 10*10 mm so there was no need for a larger machine. And using ø 80 mm diamond wheels gives me the opportunity to grind carbide without paying much for multiple wheels.
@@Michel-Uphoff yes that's about the size i use. do you find the 200W motor powerfull enough?
Yes, 200 watts is just enough. I would have preferred a little more power, but it suffices.
This motor had the desired dimensions and was so cheap that I bought two. One as a spare.
Excellent job do you have a plan
If there is enough interest I will make a video with the dimensional sketches
What Voltage and currend settings you used on the powersupply?
The motor has a Kv (velocity constant) of 250 rpm per volt. So at 24 volts it runs at 6000 rpm and at the maximum of 48 volt it runs at 12000 rpm. The maximum allowed power consumption is 200 watt. So at 24 volt the maximum current is 8.3A and at 48 volt about 4 A
What Diamond wheel did you use?
LoonPon diamond grinding wheels. See: nl.aliexpress.com/item/1005004853176941.html
Is it for sale??
No, sorry.