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The Preloaded Double Pinions (PDP) line is designed to eliminate backlash between the rack and pinion in high precision linear motion applications. The PDP is made of two ground WMH pinions, each ½ the width of the rack, connected together through a custom coupling, preload system that cancels the backlash between rack and pinion. The preload torque of the pinions can be adjusted and the units are equipped with an ISO 9,409-1 flange for adapting to speed reducers. The preloaded pinions are offered with straight (spur) or helical gears in modules from 3 to 8 and accept speeds as high as 1,200 rpm.