MRD91 Magnetic Rotary Drive

Magnetically Coupled UHV Rotary Drive

The MRD91 is a manual or motorised magnetic rotary drive which uses high strength Sm2Co17 magnetic coupling to transfer rotational forces into the vacuum envelope. This is achieved without any dynamic seals or bellows making these devices exceptionally robust and no risk of a vacuum leak for the life of the drive. The MRD91 is fitted with Index scale and position lock. The graduated handwheel provides 1° angular resolution which can be improved with a stepper motor. The magnetic coupling ensures the devices are exceptionally robust and cannot be damaged with excessive torque. The drive is fully bakeable to 250°C with the motors removed.

Key Features

Continuous 360° Rotation

Maximum 500rpm

Graduated Handwheel

1° Manual Resolution and 0.9° Motorised

Zero Angular Backlash

Axial Load 10N

Magnetically Coupled

SmCo Magnetic Coupling offers Zero Backlash

Manual Version Fully Bakeable to 250°C

No Need To Dismantle Any Part of the Drive

High Speed

1000rpm Maximum

Low Torque

Breakaway Torque 0.5Nm

Fully Motorised Options

Stepper Motors, Encoded Stepper Motors

Information Table



Flange OD mm Actuation Rotation Range Resolution Breakaway Torque Max RPM Order Code
34mm Manual 360° Continuous 0.5 1000 ZMRD91
34mm Stepper Motor 360° Continuous 0.9° 0.5 1000 ZMRD91W
34mm Encoded Stepper Motor 360° Continuous 0.9° 0.5 1000 ZMRD91ME