Step 9: Motors to run the Three Chains
The motors are also somewhat quiet when operating. I thought this was an important aspect of the clock as I wanted to keep things as quiet as possible.
The sprockets for these motors have 1/2 inch diameter bores but the motors have 6mm (metric) shaft diameters. In order to make up the difference I used 3/4 inch long sections of 1/2 inch diameter nylon rod and then drilled a 6mm diameter hole for the motor shaft. Then I set a #4 by 1 inch long machine screw through a hole that I drilled though the motor shaft.