· The Backlash specified is the reduction in circular tooth thickness. In the case of a 10 Dp gear the tooth thickness without any back lash would be 0.1571 inches. With a backlash of 0.0100 inches the tooth thickness will be 0.1471 inches.
· If two gears are fabricated each with 0.0100 inches of backlash then there will be 0.0200 inches backlash between the mating teeth. See the example below. Note: Backlash = circular pitch – tooth thickness, gear – tooth thickness, pinion.