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mancrank1

Hand spindle crank for 9x20 lathe wide shot of the hand crank installed into the spindle of a 9x20 lathe.

 

That's a ball bearing assembly used as a speed knob for turning the hand crank with left hand.

 

Manually turning the lathe spindle for turning short sections of threads near a shoulder, where power threading may lead to a crash.

 

Shop-made project cold rolled steel and a cast aluminum handwheel locks into the spindle by carefully tightening the nut at the center of the handwheel.

 

I got the idea for this sort of locking joint when I recalled how my old bike handlebar stem was secured in the forks tube.

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Uploaded on March 8, 2012
Taken on March 8, 2012