WGR Rotation Drives

The WGR Rotation Drives consist of a worm shaft and gearing system with an integral pinion shaft, which will engage with any matching spur gear slewing ring to effect rotation. Both Metric and US spur gears can be supplied.

Two basic sizes have been developed and found successful application in the mobile crane industry, and simple materials handling devices.

Size Nominal output torque Ratio Weight

WGR 72

900 Nm 30:1 23 kg

WGR 114

2823 Nm 44:1 52 kg
  • As the output is an integral pinion-shaft, matched to a specific slew ring gear, these units are only imported to order
  • All subject to factory verification of suitability
  • Maximum output speed 16 rpm
  • Available in left or right hand motor drive side configuration

The dimension plans below indicate the basic dimensions of the WGR Rotation drives. Final part references will be discussed with clients as required.

WGR 72 General dimensions


WGR 114 General dimensions



Part numbering system

The final part number is dependent on input shaft size and required output gear. e.g.

Rotation driveSizeReduction ratioInput shaftHex head non drive sideRight hand motorPinion size

Input shaft options

The standard units are generally imported with 25mm input shaft for standard hydraulic motors. ø12mm, ø14mm, ø16mm, ø20mm and a 6B Spline are optional

WGR 72 Generic drawing

(PDF) 151.46 KB

WGR 114 Generic drawing

(PDF) 155.18 KB

Associated Products

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