|TOOLS - LATHE SPINDLE HAND CRANK|
↓ Before I started machining the slot I made a plug to help me out.
↓ I used the plug to gauge the final width of the slot.
↓ I slowly crept up on the final slot width and the fit turned out great.
↓ The arm is a nice tight press fit in the slot.
The arm is secured by the M6 socket screws in the counterbores on the hub.
↓ Getting there.
↓ That's close enough for this job. I was afraid of marking the hub so I stopped at this point.