Author Topic: Little lathe tool grinder.  (Read 371 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.