You cannot use a lathe to press fit 1/2" aluminum hex shaft into a hex broached aluminum 3/8" gear. Well, actually you can get it partway in, getting out was much harder. It was harder still on the mounting block for the tail stock of our lathe. Cracked that cast iron casting right in half.

Don't blame the kids. I should of caught this before we got the bigger hammer.


Put me up on the wall of shame.