May I ask how, in this drawing, the cam secures to the 1/2 inch shaft? I have made the cam, shaft, set screw collar, bottom block and counter weight. What is to stop the cam from coming off the end of the shaft, according to the drawing? What am I missing? Press fit? (Tolerance not tight enough.) BTW the drawing is from an old PM do-it-yourself mag, 1955.
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