Jamesbury™ MGR manual actuators

Manual actuators for reliable and economical operations

Jamesbury MGR series manual gear actuator is a hand wheel operated worm gear actuator with high efficiency for greater output torque. Can be more convenient and require less space than lever handles.

Long life

Low maintenance

Easy to operate

Proven performance


  • Cast iron body with metal gears and bearings
  • ISO 5211 mounting pattern
  • Fully enclosed and weather-proof
  • Factory lubricated for their lifetime
  • Wide range of sizes and torque outputs
  • Many available options including low/high temperature, padlock flange, and oxygen, marine, or buried service
  • Adjustable stops for both open and closed positions
  • Highly visible position indication pointer


Output torque range 150 – 26 000 Nm (111 – 19177 lb-ft)
Standard temperature range -20 °C to +80 °C (-4 °F to +176 °F)

Available with female square or key drives


Provided with pre-sized hand wheel with shear pin to prevent damage from excessive input torque


Optional constructions available for special conditions