Slowing lathe RPM

[Y C LuiParticipant @yclui16187]

Posted by Dr. MC Black on 12/01/2022 13:27:35:

…. cut a chamfer on the outside edge of a approximately 40mm disc.

cutting aluminium stock of that diameter at 435 rpm is certainly no issue but for mild steel, I have some doubt. It will not work on my Emco Compact 8.  Most info on line says that the RPM need be halved or the tool will just be rubbing instead of cutting. That's assuming that the torque of the lathe is good enough to maintain a steady speed under the cutting load. Otherwise, the cutting speed will need be lowered further.

I am not sure if you have a compound slide so that the tool can travel parallel to the surface of the chamfer instead of along the axis of the disc. Without that ability the cutting load will be increasing heavy as the width of the chamfer increases. At some point, the motor stall.

May be you really need to explore the option of slowing down the lathe and increasing the torque as previously advised.

Edited By Y C Lui on 12/01/2022 14:51:11

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