Compound pulley and bearing plate for slowing a drill press by hyperair 3d model
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Compound pulley and bearing plate for slowing a drill press by hyperair

Compound pulley and bearing plate for slowing a drill press by hyperair

by Thingiverse
Last crawled date: 3 years ago
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
This thing adds a bearing plate holding two standard 625 bearings (5x16x5) and compound pulleys that can be attached using M5 cap screws.
Sources are here: https://github.com/hyperair/drill-press-pulleys

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