Just another Tool Post Grinder

Watchwatch said:
But what about the chuck? Grit getting in my 6 jaw would keep me up at night!


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put a bag over it... she'll never know what happened.. :grin: then tape around her. really there are ways to protect things. put a hole in piece of cardboard, or piece of tyvek and hold it using something.

Or don't , and worry about your equipment, and never venture out to do things that might put grit on your lathe... Don't cut cast iron either.

Look, you can have pristine equip, or you can use it... Take apart the chuck and clean it after.. I use sandpaper / emery / tool post grinder/ cut cast iron.. I protect my ways, I protect my carriage. I vacuum when done. I wipe with a paper towel a few times.. I oil after, then wipe again hoping that if anything is left, the oil pics it up and so does my fresh paper towel.

BTW I run a file on my lathe... sometimes it cuts, sometimes its so fine its like grit..

just saying.

now if you have a super precision lathe like a 10ee, or rivet or similar then yea, do it on a different lathe.
 
Brucepts said:
Been looking at all sorts of small tool post grinder ideas for my 1440 lathe and came up with my own take on what might work for my applications.

To be honest I'm not even sure what I will be using it for but decided to build something anyways.

Started with a BXA 1" boring bar holder, ER20 100L arbor, 20x32x7 bearings (started with ABEC 1 but upgraded to ABEC 3 once the concept worked) and a 775 DC motor. Bored the holder for the bearings, machined my own round belt pulley set to fit 4mm belt. Working on a design now for dressing tool holder.

Not sure how the 775 motor will work out, I was impressed with how well it has done in my testing so far. I'm looking at an upgrade for that in the future though.

This is a work in progress and I appreciate all those who have posted their own designs for others to look at, I'm sure you will find your ideas alive in other's projects!
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Nice job, this is something I have been wanting to buy. Maybe after seeing your grinder I think you gave me the feeling I can try it!
Thanks!
 
Brucepts said:
I updated the motor today, over the holiday I got a (what I thought) bargain on a 48vdc 400w brushless spindle motor with, 48v power supply, controller & tach for $103 (there was a $25 discount coupon) off Amazon. The motor had an ER11 collet holder that in the pictures appeared to be removable which is what I was looking for. The one I received had it machined on the motor shaft. At some point I'll probably machine the excess part of the ER11 off the shaft.

I was able to modify my existing motor mount for the new motor and just needed to bore out the motor pulley to fit the larger 15mm shaft. I like the fact it came with the tach so I can set my spindle speeds. It is quiet compared to the other motor and has no issue going up to the motor speed of 12,000rpm's

Hope this project inspires others to build something in their shop!
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Man, that is really sweet.I want one.
 
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