Heat Sinks

Keeping my steppers cool.

This is a rendering from Rhino. I haven’t made one yet but the drawings are complete and so is the CNC program to produce this part. Material is on order.

It is a combination heat sink (stepper motors get very hot) and a shaft spacer to let me install a larger shaft coupling on my HB2 motor to screw connection.

The overall size is 4″ x 4″ and is 1″ thick. The inset is to fit a NEMA #23A style motor. There is also a recess on the underside for the standard spacer which will be used.

I figured why just do a spacer when here was a chance to get some aluminum fins on the stepper motors. Many CNC designs just hang the motors out on some thin rods, nothing to pull heat from the motor. The motor manufacturers recommend mounting the face of the motors on a metal surface of enough mass to act as a heat sink.

I need four of these  for HB2 and if they work as intended, I will market them in the THMStore.