Raymarine Type 2 Rotary Drive Unit 12V M81136

Binnacle.com #:  28236
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Raymarine Type 2 Rotary Drive Unit 12V M81136

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Type 2 Rotary Drive for sprocket and chain type steering systems on vessels up to a displacement of 44,000 lbs.
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Binnacle.com:   #28236
Brand:  Raymarine
MFG Part#:   M81136
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Raymarine Type 2 Rotary Mechanical Drive Unit M81136

The Type 2 Rotary Mechanical Drive M81136 is designed for steering systems on vessels up to a displacement of 44,000 lbs (20,000 kg) that can be driven from the helm position through a chain and sprocket (for example: cable and rod steering systems).
The outstanding design of the Raymarine rotary drive unit provides smooth, powerful autopilot-controlled steering with quiet operation.

The main parts of the drive are:

  • a rugged electric motor, that drives a precision epicyclic gearbox via a high tensile drive belt
  • an electromagnetic clutch that transmits high torque loads without slipping.

Unit supplied with M81136 Rotary Drive, Mounting foot and Spacing Shims (3). It is not supplied with a Sprocket. Optional drive sprockets and modification to the steering chain may be required.


  • Approvals: CE Approvals - Conforms to: 89/336/EC (EMC), EN60945:1997 and 94/25/EC (RCD), EN28846:1993.
  • Peak output torque: 34 Nm (300 lb.in)
  • Maximum shaft speed: 33 rpm
  • Recommended Hardover to Hardover (no load): 10 sec
  • Dimensions: L 274 mm (10.8 in), W 184 mm (7.2 in), H 195 mm (7.7 in)
  • Protected for use in engine compartments
  • Nominal supply voltage: 12V DC
  • Power consumption (standby): 60-84 W
  • Corepack Used: ACU-400

Remember, always take the fully laden displacement weight of your vessel into account. This is often 20% above the designed displacement. Do not choose a pilot which will always be working at the limit of its design capabilities.

  Rotary Drive Type 1 2 & 3 Installation Manual
Serial Number - This product has a manufacturer's serial number that uniquely identifies the item. When your order ships, Binnacle.com will record the serial number and add it to the history of the order. Should the item go missing before it arrives, we will register the serial number with loss and theft databases to prevent fraudulent use or resale of the item. There is no action required from you, and the serial number will only be used to prevent fraudulent activity associated with the missing item.
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