Yes, loads imposed on the slow speed shaft will vary according to the method used to connect the shaft to the driven machine. Frequently, in addition to the torsional forces, radial (overhung) and thrust loads are applied to the slow speed shaft at the same time. For example, coupling connections normally involve torsional forces only. However, when power is transmitted through spur gears, belts, pulleys, or chains, both torsional and radial forces may be present. When driving through helical or bevel gears, all three conditions (torsional, radial, and thrust load) may be referred to the reducer shaft. The slow speed shaft and bearings must have sufficient strength to withstand these loads, and it is necessary to determine the allowable limits for each condition. The Special Load Guidelines section in the Appendix of our cagtalog explains how to calculate the overhung load (radial) applied to the output shaft.
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