Compound pulley and bearing plate for slowing a drill press

I made these pulleys in an attempt to use a standard 12k/8k wood drill press for drilling stainless steel. I had previously been controlling the pressure by hand to partially stall the motor and slow it down to the requisite speed for drilling steel, but wore down a number of HSS-Co drill bits in the process.

The original drill press had two compound pulleys:

- driving pulley attached to the motor: 17mm and 22mm
- output pulley attached to the drill head: 22mm and 33mm

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