![]() ![]() Spur gears are easier to manufacture and inspect than helical gears, and they can be rectified more easily at the assembly stage if required. The two types of tooth that can be used for both parallel and angled drives are straight or helical (spiral). And it is intended for the reader to use his own experience in selecting formulae, stress values etc., for gearbox components. ![]() It should help students not familiar with gearboxes, lay out a reliable working design. The purpose of this booklet is to set out the basic design for an industrial gearbox. However without experience in this field the designer cannot be expected to cover all aspects of gearbox design. To the competent engineer, the design of a gear unit, like any other machine, may seem a fairly easy task. An industrial gearbox is defined as a machine for the majority of drives requiring a reliable life and factor of safety, and with the pitch line velocity of the gears limited to below 25 m/s, as opposed to mass produced gearboxes designed for a specific duty and stressed to the limit, or used for very high speeds etc., e.g. You will find them between the prime mover (i.e.: electric motor, gas, diesel or steam engine, etc.) and the driven equipment: conveyors, mills, paper machines, elevators, screws, agitators, etc.). Gear reducers are used in all industries, t hey reduce speed and increase torque. ![]()
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