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Rack can be seen as a number of teeth as part of an infinite number of gears, the gear of the round into a straight line, as part of the tooth profile involute into a straight rack and pinion, compared its characteristics as follows: as a result of rack tooth profile is straight line, so that each point on the tooth profile normal parallel, and when the transmission rack is doing translation, the size of each point on the tooth profile speed and in the same direction so that each point equals the pressure Angle, its size is equal to the slope Angle of tooth profile, known as the tooth profile Angle Due to the side of the teeth on the rack tooth profile are parallel, so no matter on the dividing line or addendum online or its other parallel straight line, the pitch is equal to the rack rack and also points straight helical rack, respectively with spur gears and helical cylindrical gear pair is used;
Rack tooth profile ?