|Forum topic by BobBlarney||posted 04-12-2016 08:08 PM||357 views||0 times favorited||1 reply|
04-12-2016 08:08 PM
I’ve a chassis from a Weslo treadmill (formerly used as a clothes rack). It has a variable speed (0-5600rpm max.) 2HP permanent magnet DC motor. I had intended to convert the chassis into a widebody sander, with a 3-4” drum turned on my lathe.
When I disassembled the chassis I noticed that it has a micro-groove pulley/belt drive similar to the drive on the lathe. It would be very nice to eliminate belt pulley changes, as well as have variable speed. It so happens that the belt from the lathe fits the treadmill pulleys, but the treadmill pulleys have 9 grooves instead of 3 grooves. (The treadmill belt uses 8 of the 9 grooves, btw.)
So, my questions are:
1. Is the DC motor suitable for driving the lathe? As I recall, DC motors develop maximum torque when stalled, and minimal torque at maximum speed. I don’t anticipate running the lathe > ~3800 RPM (spindle speed).
2. Is a 3-groove belt sufficient to handle the power? When properly aligned and tensioned, I don’t think that the 3-groove belt would jump off the 9-groove pulley, but is that a reasonable assumption?