The threads have finally stripped on mine and now I can't hold some of my tools.
The threads have finally stripped on mine and now I can't hold some of my tools.
warmachinellc.com
I make my own. I'll post some info later tonight
pete
I buy grade 8 bolts (7/16x20) from Mcmaster (part # 91257A487). Look at the pdf, (don't mind the bad pdf drawing, I'm a rank beginner at this cad stuff), but it will give you an idea of how I made mine. The hex is 5/8" 4140 , also from Mcmaster.
The intermediate part is made from some round stock I have laying around. I turned it to act as a guide for the hole at the top of the spindle nd to help in releasing the collets.
In my situation, using my power drawbar thing, I hardened the Hex portion and use two roll pins to hold it in place (the pdf does not show the holes on the end of the bolt) . The harding really helps with using a power drawbar.
All the sizes are approximate (I'm at work and I just winged this from the top of my head
pete
warmachinellc.com
I machined the hex today and opted for a 3/4" drive to match my vise, I then heat treated it with a MAPP gas torch and used motor oil. I'm now tempering it at 350F for an hour. This one is made from 1215 steel but next time I'll use 4140.
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warmachinellc.com
Nice job, Jim !!!!
pete
That turned out nice!
Bill
billyjack
Helicopter def. = Bunch of spare parts flying in close formation! USAF 1974 ;>)