ProductsRotary DrivesMagnetically coupled Rotary DrivesMRD91 Magnetically coupled rotary drive

Magnetically coupled rotary drive (MRD91)

The MRD series magnetic rotary drive uses a high strength magentic coupling to transfer rotational forces into the vacuum envelope. This is achieved without any dynamic seals or bellows making these devices exceptionally robust.

Gallery - Image and schematic

Technical Data MRD91
Leak Rate<1x10-10 mbar l.s-1
Pressure Range1x10-10 mbar – 2 bar absolute
Temperature Range250 oC standard UHV drives (with motor/gearbox removed)
 200 oC Extended UHV drives (with motor/gearbox removed)
MaterialsBody – 316 stainless steel
 Mechanical parts – aluminium alloy – grade 6082
 Bearings – stainless steel
 Magnets – sintered rare-earth
LubricationDry film molybdenum disulphide (standard UHV drives)
 UHV compatible lubricant (extended life drives)
ActuationManual, Stepper Motor, Encoder, DC Motor
OptionsCeramic bearing options, special shaft length/diameters, available on request.
Magnetically-coupled Rotary Drives (MRD91)
DN TypeFlange OD mmType of OperationBreakaway Torque NmThrust NMax Rotation RPMLife Shipping weight kgOrder Code 
DN1934Stepper Motor (1)0.5101000Standard1.0ZMRD91W
DN1934Encoded Stepper (2)0.5101000Standard1.0ZMRD91ME  
(1) Wired to suit SIMSTEP controller
(2) Complete with power supply and on board controls

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