Joining the Motor and Transmission, Part 2

This is the business end of an AC 55 motor.  It is big, mean, heavy, and not much use in its current form.  We need to add some hardware.

First up is the hub. The hub is a chunk of steel that slides over the splines of the motor shaft, and grips them securely with a taper lock bushing. There are tapped holes and a shoulder feature that will prove useful for mounting the flywheel.  Just behind the hub is an aluminum sleeve that I machined on my lathe.  Its only purpose in life is to hold the hub in the correct position, while tightening the taper lock bushing.

The next part to be bolted to the motor is the adapter plate.  This plate does two things.  It serves as a spacer, so the thickness is critical for locating the clutch depth into the transmission bell housing.  This plate must also be structural, and provide a strong connection between the transmission and the motor.

The next plate is 0.75" (19 mm) thick, and takes its form from the shape of the transmission bell housing.

Paul is making sure all these bolts are well torqued.

Seeing Paul sitting on the motor reminded me of another image.  Anyone know the movie?

The flywheel is pressed into the hub, but not bolted in yet.  The next step will be to re-thread some metric M8 bolts over to imperial 5/16".  I'm joking.  We have metric/imperial confusion when mixing both standards on the same project.  But in this case we have a good excuse.   There is only 2.5 thousandths of an inch (63 microns) difference between 8 mm and 5/16 of an inch.