WGR Series Rotation Drives

A small range of ROTATION DRIVES has been developed.

These drives comprise a worm shaft and gearing system with a pinion shaft to engage with a standard spur geared slewing ring to effect rotation. (Both Metric and US spur gears can be accomodated)

Two sizes have been developed to date and have found succesful application in the mobile crane industry. Download the basic drawing by clicking on the part number

Size Nominal output torque Ratio Weight
WGR72 900 Nm 30:1 23 kg
WGR 114 2823 Nm 44:1 52 kg


  • The output pinionshaft will be matched to the slew ring gear
  • Units only available fully assembled and subject to factory verification of suitability
  • Maximum output speed 16 rpm.
  • Available in left or right hand motor drive side configuration

For more information and a quote please contact NBC Technical by e-mail or phone 01952 222300

Whilst every effort has been made to ensure the accuracy of the information on this website, if you spot a mistake please inform the webmaster@nbcgroup.co.uk. Thanks!