The WR Series motor incorporates the latest advances for smooth performance efficiency and durability. It features an optimized Roller Stator® geometry with seven precision rollers to eliminate sliding friction and provide rolling contact between the rotor and stator. This increases motor efficiency. A three-zone spool valve integral check valves and a provision for a case drain reduce pressure on internal seals to improve product life. A wide variety of mounting shaft motor displacement and porting options are available to meet all application needs.Pictures shown are for illustration purposes. Prices subject to change without notice. Our website has three generations of White part numbers. If you are having trouble finding the correct part number, text or call 617-694-1500.