Ridder Drive Systems

Model RW45 - Motor Gearboxes



The RW45 motor gearboxes are maintenance-free, compact drive units for operating ventilation, screen and flap ventilation systems in greenhouses and livestock houses. All RW45 motor gearboxes feature a self-braking worm gear transmission. This transmission ensures that the output shaft is braked when the drive unit is stopped. The combination of carefully matched pinion and worm reductions results in a very quiet mechanical transmission.

The RW45 motor gearboxes feature a patented integrated linear limit switch system with duty and safety switches having excellent switching precision. The maximum switching range of the limit switch system equates to 97 revolutions of the drive shaft. The optional RPU PositioningUnit accurately monitors the current position of a drive system and transmits this data back to your climate computer or controller. This position feedback can also be achieved using an installation set with a potentiometer.

The RW45 motor gearboxes are finished with a graphite grey powder coating and are supplied including fixing bolts and spring washers.

RW45 Motor gearboxes:

  • Drive torques up to 120 Nm at 50 Hz and 60 Hz mains frequencies;
  • Rotation speeds from 1 to 5 rpm at 50 Hz, 1.2 to 6 rpm at 60 Hz mains frequency;
  • Suitable for intermittent use, duty class s3-30%, duty cycle maximum 25 minutes;
  • Fitted with 12-tooth 1⁄2'x5⁄16' zinc-plated sprocket for chain couplings;
  • Option for 16-tooth 1/2’x5/16’ sprockets to compensate for larger angle differences (up to 6°);
  • Manual drive enabled by means of a hexagon socket in electric motor shaft;
  • Electric motors are standard tropic-proof and conform to protection class IP55;
  • Available with 3-phase electric motors, 400 V at 50 Hz (eurovoltage, EM type A);
  • Or with 3-phase electric motors with CSA and UL approval, 208-415 V at 50/60 Hz and 415-480 V at 60 Hz (wide voltage, EM type B);
  • Or with 1-phase electric motors, 230 V at 50/60 Hz (EM type D);
  • Or with 1-phase electric motors with CSA and UL approval, 115 V at 60 Hz (EM type F);
  • Other specifications and colours available on request.

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