Step #1: Pre-Selection:
From the MicroMo catalog, choose a gearhead that has a continuous output torque greater than the one required for the application. If the required torque load calls for intermittent use, selection is based on the output torque for intermittent operation. In this example, we mus select a gearhead for continuous operation. Searching for a unit with desired diameter, length, and shaft loading characterisics, we find that gearhead 16/7 meets the specified parameters:
Continuous Ouput Torque = 42.5 oz-in.
Radial Shaft Load = 108 oz
Axial Shaft Load = 18 oz
To calculate the theoretical reduction ration, the maximum available motor input speed for this gearhead is assumed to be 5,000 RPM. Dividing the available input speed by the required output speed will give you the reduction ratio required:
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