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Before you can calculate gear ratio and speed, it's important to understand the definition of a gear. A gear is a toothed wheel that works together with another toothed wheel to alter the speed or direction of a driving mechanism (such as a motor).
Typically gears work in pairs; the driving gear and the driven gear. The driving gear is the gear that is rotated by the prime mover and the driven gear is the gear that is pushed (or driven) into rotation. A gear ratio is the relationship between the speed of the driving and driven gear in a gear set.
While electric motors are in operation in industrial applications all over the world, each country can have their own energy efficiency testing standards and efficiency classifications. To accommodate the global nature of business, and address all these variations, the International Electrotechnical Commission (IEC) was formed to globalize electrical standards including efficiency standards.
Production and operating costs can be significantly reduced by using conveyor belt systems with variable speed control. This is especially true in industries that rely heavily on the efficient movement of materials, such as material handling and processing plants.