The radial Backlash is the shrinkage (displacement) in the stated center distance when it is set so the meshed tooth flanks of the paired gears get contact each other. The maximum angle that allows the gear to move when the other mating gear is held stationary. The minimum distance between each meshed tooth flank in a pair of gears, when it is set so the tooth surfaces are in contact.
The length is the distance the gear is rotated until the meshed tooth flank makes contacts while the other mating gear is held stationary. 6.1 Types of BacklashesĬircumferential Backlash is the length of arc on the pitch circle. Backlashes are classified in the following ways. Backlash is the amount by which a tooth space exceeds the thickness of a gear tooth engaged in mesh. For smooth rotation of meshed gears, backlash is necessary.
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