Re: Making a Screwless Vise

"Bob La Londe"  wrote in message news:1014rbu$2n8jb$1@dont-email.me...
I am sure of some of you (particularly old school employed machinists)
made one during your apprenticeship. ...
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I did, part of a milling attachment for my AA lathe before I found better. Shoulder screws in shear as dowel pins attached the fixed and movable jaws to the flat vise bed. Setscrews passing through the movable jaw clamped the work. Drilling, tapping and counterboring the vise bed was pretty easy on the school's Bridgeport. The back of the vise bed is the dovetail for the vertical slide. It was rigid enough for the intended use with aluminum and plastic, as the AA lathe can't cut much steel.
The AA is still useful, I cut off the 1/4" HSS threading bit for the jack adapter ID in the 4-jaw with a Dremel and cutoff wheel on the carriage. The SB has hardened ways, so no grinding on it.
For the carbide grinder project I cleared some space by moving out a 3 phase 1/2HP 220V pedestal grinder that was part of an auction mixed lot I bought for the scaffolding, for $10. The megger I acquired later showed its insulation safe to 500V, worth checking with discarded motors. The connection that made it run as a test was AC from a 0-280V Variac on two leads with a 12uF motor run cap to the third. At around 120V and 4A it spun slowly and gradually accelerated until suddenly taking off to normal speed, where the current fell almost to zero. That's not a proper static converter but it was enough to test the motor and bearings.