A little late to the party, but after
years of hand cranking that blasted knee, I finally made an adapter to use a Milwaukee Hole Hawg as the power source. I don't think it will fail.
The mill I've been using at home is a Do-All knee mill (Bridgeport clone from Taiwan) The Milwaukee I picked up a few years ago and it's been sitting on a shelf, waiting for some task to perform...well, here it is !
After studying the situation, I determined that there really wasn't a need for 9 notches in the adapter; just need 3 pins at 120º; 3/16 Dowel pins fit nicely in the slots on the sleeve of the Z axis of the mill. BTW, the Z-axis shaft on the Do-All is 16mm. not 5/8"
The pins are on a .65625R
The end that fits the Milwaukee was bored for a slip fit and keyed @ 5/16". The stock 1/4-20
LH shcs holds the adapter on.
If anyone wants a drawing, let me know.....just have to finish it up.
It works really well and the low-speed seems to be ideal.
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In action.....
https://drive.google.com/open?id=1IrsqvY7MvYWyBmTO1savG-FbroNoESDB
I plan on installing some limit switch stops with a plug-in that will cut the power to the drill. That will be much better than "hard stops". As they won't be hard-wired into the drill, they will swing out of the way to allow reversing the direction.
You can find used Milwaukee Hole Hawgs on eBay occasionally.
Menards also has 5/8" corded drills which should have plenty of power too;
Performax® Corded 5/8" Spade Handle Drill - 7 Amp
Model Number: 2410956 Menards® SKU: 2410956
