Hi Dana,
The cam and cam gear are cast iron, they are a nice fine grade, but relatively easy to drill.
I did mine in the mill with two fat steel parallel bars so the the cam was well clear of the mill bed.
I rested the back of the cam gear on the parallels.
I hope that makes sense.



I would have had to put it in the drill press anyway... but I have heard the steel in a cam and cam gear is hardened steel, so would have to send to a machine shop to get it drilled?


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