The Worm Gear Box reduction ratio is determined by the number of starts of the worm and number of teeth on the worm gear.Worm gear sets are used to transmit power between non-parallel, non-intersecting shafts, usually having a shaft angle of 90 degrees. The direction of rotation of the worm wheel depends upon the direction of rotation of the worm, and whether the worm teeth are cut in a left-hand or right-hand direction.However right hand worm and worm gear sets are considered standard.
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Worm Gear Boxes are widely used in power transmission applications, in which a compact high reduction and a relatively low speed drive is required.A worm gear reducer is one type of reduction gear box which consists of a worm pinion input, an output worm gear, and features a right angle output orientation.The primary benefit of worm gears is their ability to provide high reduction ratios and correspondingly high torque multiplication. This feature enables the user to handle loads with high shock.The worm-drive design not only minimizes backlash but also eliminates back-driving the motor so a position can be held even when power is not applied.