The handle for raising and lowering the knee is certainly adequate, but when transferring from high to low limits takes a while. I wanted to make a castellated nut that I could connect a hand drill, to make the task easier.
The existing nut has 7 sections. It was a simple task to program the Sherline table for 7 divisions, and a 1/8" endmill proved to be just the right size. After one revolution, a second pass was made to remove the "nibs" between sections.
The programming box for the sherline is shown above. The finished nut is on the top right. The resulting fit was perfect, no slop at all. On the bottom right is the nut positioned where the crank handle would normally go. A hand drill is chucked to the spud to move the knee.
