Abstract
This chapter discusses the most common types of driving systems, their influence on the starting characteristics of the motor, and their effect on bearings. Belt drives are employed to transmit load from the driving shaft of the motor to the driven shaft when they are separately located. Two types of belting are available for industrial use: flat belts and V belts. The load-transmitting capacities of a single V-belt, at 180° arc of contact, are provided by the belt manufacturer as standard selection data for the user for different areas of belt cross-sections and speed of the faster shaft. The selection of flat belts is made along similar lines to that for V-belts. The selection of these belts depends on the Service factor, Correction for length of belt, and Correction for arc of contact. When transmitting the load to the driven equipment, the motor bearing at the driving end (DE) is normally subject to two types of forces: radial and axial. These forces become severe when the load from the motor is being transmitted through belts. A few guidelines are also provided in this chapter for checking the suitability of the bearing and the motor shaft, when selecting a motor for these drives In belt drives particularly.
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