We have a mechanical drive assembly containing a shaft, gear, and keyway that drives a rock crushing mill. The shaft of the machine has a
1.313^('')
outside diameter and is made from SAE 4140 alloy steel. This shaft transmits
2750lb**
in or torque to the gear. The gear is made from SAE 1018 steel, and has a hub width of 2.000 ". Using the 'design procedure for parallel keys, determine the proper key length assuming a key material of SAE 1045. All material specifications come from Table
11-4
in the PowerPoint material.