Author Topic: Little lathe tool grinder.  (Read 1404 times)

Offline dvbydt

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Little lathe tool grinder.
« on: May 08, 2018, 10:04:31 AM »

As promised here is my lathe tool grinder. A compound table was part of the deal when I ordered my lathe but I had never used it. The lathe was single phase, so I converted it to three phase using a VFD. The VFD was a bargain and I got a further discount for buying two. The hunt was then on for a small, 0.25Kw, totally enclosed, 2,700 rpm motor. Luckily a local supplier had one at a good price.

The motor support was made from a short piece of RHS (square tube 0.125 wall) with end plates welded in. The compound was held to this tube with 4 M8 screws. Not wishing to have the lead screw on the long axis, I made up a lever attachment, which makes the grinder  easier to use. To keep the dust off the cross slide I made up two bellows from acetate sheet. Not an easy thing to do, had to get some tips from Utube! However, they spray painted up OK.

I am happy with the end result. The VFD means I can run the motor at the correct speed for both the grinding wheel and the diamond cup wheel.

Ian

Offline DICKEYBIRD

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Re: Little lathe tool grinder.
« Reply #1 on: May 08, 2018, 01:42:57 PM »
A great use of available equipment; very nice!  Would it possible to do a video of it in use?  I'd like to make something similar for my Acorn retro'd ORAC.
Milton in Tennesee

"Accuracy is the sum total of your compensating mistakes."

Offline dvbydt

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Re: Little lathe tool grinder.
« Reply #2 on: May 08, 2018, 05:07:15 PM »
Sure, I'll try to get a short video on YouTube - anything in particular you would like to see?

Ian

Offline DICKEYBIRD

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Re: Little lathe tool grinder.
« Reply #3 on: May 08, 2018, 05:25:24 PM »
Setting up the angles on a lathe bit & the actual movements of your grinder would be great, thanks.:)
Milton in Tennesee

"Accuracy is the sum total of your compensating mistakes."

Offline dvbydt

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Re: Little lathe tool grinder.
« Reply #4 on: May 08, 2018, 06:55:52 PM »
OK will give it a go. May not happen instantly but will happen.

Ian

Offline dvbydt

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Re: Little lathe tool grinder.
« Reply #5 on: May 09, 2018, 07:24:21 AM »
Well, for once it looks as if I have conquered modern technology without it biting me!
Lets try a Ctrl V :-


Yea. That link should take you to a very short video of the grinder being used.

Ian

Offline DICKEYBIRD

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Re: Little lathe tool grinder.
« Reply #6 on: May 09, 2018, 03:34:36 PM »
Great, thanks Ian.  That's a good little video!  I have all the bits'n pieces stashed in my shop to build one very similar to yours.  After seeing it, I need to nudge mine a bit closer to the top of the list. :beer:
Milton in Tennesee

"Accuracy is the sum total of your compensating mistakes."

Offline dvbydt

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Re: Little lathe tool grinder.
« Reply #7 on: May 09, 2018, 03:45:43 PM »
Great, I am just pleased that the video worked! I wish you every success with your build.

Ian.

Offline vtsteam

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Re: Little lathe tool grinder.
« Reply #8 on: June 10, 2018, 05:41:20 PM »
Very nice!  :clap: :thumbup:   Sorry I missed this one. :beer:
I love it when a Plan B comes together!
Steve
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Offline dvbydt

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Re: Little lathe tool grinder.
« Reply #9 on: June 13, 2018, 04:17:14 PM »
Thanks for the interest.
Decided to make a dedicated grinding "cupboard". The venerable Wolf double ended grinder is mounted on a pair of drawer slides so that I can pull it out and lock it in position when polishing on the right hand side (Beartex wheel). Slides are cheap enough to replace if the dust ruins them.
At the back is a fishtail from my Vax vacuum to keep the dust flow away from me.
Lighting is provided by four LEDs - G9 base 240 volt 5W 340 lm. Plenty of almost shadowless light (and ideal for extracting miniscule brass splinters!).
« Last Edit: June 13, 2018, 06:22:57 PM by dvbydt »

Offline vtsteam

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Re: Little lathe tool grinder.
« Reply #10 on: June 13, 2018, 04:27:12 PM »
dvbyvt, that looks handy. How do you lock the grinder in position?

(ps. smaller photo would help -- 800 pixels across max is suggested for this forum -- I can only see a bit at a time while scrolling)
I love it when a Plan B comes together!
Steve
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Online awemawson

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Re: Little lathe tool grinder.
« Reply #11 on: June 13, 2018, 04:39:07 PM »
I went next door so I could see the whole picture  :lol:
Andrew Mawson
East Sussex

Offline dvbydt

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Re: Little lathe tool grinder.
« Reply #12 on: June 13, 2018, 05:20:48 PM »
Andrew - Did they give you a cup of coffee?
Ian

Offline dvbydt

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Re: Little lathe tool grinder.
« Reply #13 on: June 13, 2018, 05:26:17 PM »
The grinder is locked with a wooden peg going through the slide mounting into the base. I only has to resist grinding an polishing pressure.

The photos were from the original files - not from the temp file that contained the reduced size and edited photos.

How do I edit the posted photos?

Ian

Offline vtsteam

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Re: Little lathe tool grinder.
« Reply #14 on: June 13, 2018, 06:13:03 PM »
Done.

I'm a moderator, so I'm not sure what buttons you have available but I think you hit Modify, then drop down to Attachments, open that up and your photos will be named with check boxes there. Uncheck the one you want to remove. Close. Then reopen in modify mode and upload a reduced size version, if you have it ready.
I love it when a Plan B comes together!
Steve
www.sredmond.com

Offline vtsteam

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Re: Little lathe tool grinder.
« Reply #15 on: June 13, 2018, 06:14:03 PM »
Is there any problem with vibration when it's extended out on the drawer slides?
I love it when a Plan B comes together!
Steve
www.sredmond.com

Offline dvbydt

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Re: Little lathe tool grinder.
« Reply #16 on: June 13, 2018, 06:18:33 PM »
Vibration is not a problem. It might be if the wheels were unbalanced,
I will try you idea on the photos, thanks.

Ian

Offline dvbydt

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Re: Little lathe tool grinder.
« Reply #17 on: June 13, 2018, 06:25:45 PM »
Modify worked thanks but now they are small (my editing!!!). Ctrl + on keyboard will get them bigger.

Ian

Offline vtsteam

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Re: Little lathe tool grinder.
« Reply #18 on: June 13, 2018, 07:09:03 PM »
Heh, I already had reduced them to 800 x 600 for you, so now they're doubly reduced.  :lol:
I love it when a Plan B comes together!
Steve
www.sredmond.com

Offline dvbydt

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Re: Little lathe tool grinder.
« Reply #19 on: June 13, 2018, 07:22:08 PM »
It's all fun here!!

Ian

Offline Neubert1975

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Re: Little lathe tool grinder.
« Reply #20 on: July 16, 2018, 10:11:48 AM »
nice grinder you have made there, i might end up making one inspired from yours.
Thanks for sharing it  :thumbup:

Offline dvbydt

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Re: Little lathe tool grinder.
« Reply #21 on: July 16, 2018, 03:33:34 PM »
You're welcome. If inspiration strikes, please post.

Offline Neubert1975

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Re: Little lathe tool grinder.
« Reply #22 on: July 16, 2018, 03:53:27 PM »
You're welcome. If inspiration strikes, please post.

it all ready did, so i have started, just using a small proxxon compound table i had laying around.

Offline Coldrolled

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Re: Little lathe tool grinder.
« Reply #23 on: August 02, 2018, 03:52:07 PM »
Nice work,

I have been looking for some ideas and this seems to be one of the better ones to me.

Thanks for the post.