Not sure how much torque you need, maybe something like this could be made to work?
Permanent Magnet (PM) DC Motors with Planetary Gearboxes
Looking to do some .015" slits in thin wall 5 mm Stainless tubing.
I was around 200 rpm on the Mill, but want it on the GT-75 and remove a second Operation.
I got live tooling aleady, an Air Turbine Spindle for small endmills and also a Foredom Head with flex shaft for drills.
Need something to run slower and thought it would be easy. Any ideas out there, My tooling holders are 1" OD.
Thanks much, John
If you use the actual recommended SFPM of 50 or so, then a 2" dia blade ought to be going around 100 RPM. 200RPM should be okay though. I think that's about what I used on the mill. Part slot is ½” into tube in it will divide the end into 4 sections.
The torque I calculated for the slit is about 4 in-lb. That's assuming an RPM of 100 and a chip load of 0.0007" on a 150 tooth saw. I think I did it right, but not 100% sure.
With a total wall thickness of 2 x 0.015" = 0.030", the material removal rate is about 0.005in^3/min. The Power Factor for Austenitic SST with a HB of 250 is 1.09.
I used this site:
MAPAL Milling Calculator
Thanks for the link Matt that looks like the right direction.