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- Sep 28, 2013
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- 4,306
alright, next project on the list - adding a variable speed treadmill motor and tach to my WT drill press which also doubles as a sort of mill. It currently has a 1/3hp motor with 5 step motor>intermediate>spindle pulleys to give 250-900rpm and 3000-5000rpm. Changing belts in the lower range isn't a major deal, but it's enough of a hassle that I'm almost always using the wrong speed for something, and that gap in the middle is a huge pain.
I got a 1.5hp treadmill motor and MC40 controller from a treadmill our neighbours threw out and it's been on my list of things to do since the summer. I did this mod to my Atlas 618 lathe with a motor from jpfabricator which is awesome, so hopefully this one should be relatively smooth sailing.
One thing I want to do differently this time is to use the flywheel/fan that came with the motor. I'll need some way of securing it to the motor shaft (1/2-13 LH thread) and I'll have to add a V pulley to it, but that should still be easier than adding a bespoke fan like I did with the lathe motor.
First step, 1/2in mandrel to bore out a spare V pulley. 1/2" piece of mystery steel, countersunk, drilled and tapped for 10-32 and slit with a hacksaw. I tried my slitting saw but the material just laughed at it.
pulley mounted up on the mandrel in my collet chuck. I used the smallest pulley with the biggest boss that I had, some garage sale find
lots of nasty CI later, it's bored out to 1.001in and the outside is tarted up.
next, make a 1/2-13 LH threaded mandrel to mount the flywheel to so I can turn the OD of the multi-V-rib pulley down to 1". Hopefully later today or tomorrow.
I got a 1.5hp treadmill motor and MC40 controller from a treadmill our neighbours threw out and it's been on my list of things to do since the summer. I did this mod to my Atlas 618 lathe with a motor from jpfabricator which is awesome, so hopefully this one should be relatively smooth sailing.
One thing I want to do differently this time is to use the flywheel/fan that came with the motor. I'll need some way of securing it to the motor shaft (1/2-13 LH thread) and I'll have to add a V pulley to it, but that should still be easier than adding a bespoke fan like I did with the lathe motor.
First step, 1/2in mandrel to bore out a spare V pulley. 1/2" piece of mystery steel, countersunk, drilled and tapped for 10-32 and slit with a hacksaw. I tried my slitting saw but the material just laughed at it.
pulley mounted up on the mandrel in my collet chuck. I used the smallest pulley with the biggest boss that I had, some garage sale find
lots of nasty CI later, it's bored out to 1.001in and the outside is tarted up.
next, make a 1/2-13 LH threaded mandrel to mount the flywheel to so I can turn the OD of the multi-V-rib pulley down to 1". Hopefully later today or tomorrow.