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Raymarine

M81135

Rotary T1-12V

Designed for Raymarine autopilot systems, the M81135 type 1 12V rotary drive is ideal for sailboats up to 10,000 kg, providing 20 Nm of torque. It features a robust motor and an electromagnetic clutch for precise and silent steering via chain and pinion. Included: rotary drive, mounting bracket, 3 shims.

Retail priceBenefit from the professional rate

£1,667.52 GBP

£1,667.52 GBP ~~£1,834.26 GBP~~

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In stock

Free pickup point from €150 in France
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Custom installation

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Installers near you

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Support service

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Technical specifications

Operating voltage	12
Max power consumption	48
Typical power consumption	24-48
Recommended fuse rating	10 A
Product width	274
Product height	195
Product depth	256
IP rating	Not waterproof
Mounting type	On flat surface (vertical or horizontal)
Certifications	CE, EN60945, 89/336/EEC, 94/25/EEC, EN28846:1993, 92/59/EEC
Drive unit type	Rotary Type 1
Hard-over time	10
Mounting hardware included	No
Mounting orientation	Vertical or horizontal
Integrated rudder angle sensor	No
Max torque	20
Disengageable	Yes

Detailed description

The Raymarine M81135 rotary is a Type 1 autopilot drive unit designed for sailboats equipped with chain-and-pinion steering systems. It is intended for vessels with a maximum displacement of 10,000 kg, providing a precise and quiet steering solution. This model differs from the Type 2 rotary (M81136 for 12 V or M81137 for 24 V) in its lower load capacity; the Type 2 is suited for boats up to 20,000 kg with an output torque of 34 Nm, compared to 20 Nm for the Type 1.

Design and Technical Performance

The M81135 rotary integrates a robust electric motor that drives a precision epicyclic gearbox via a high-strength drive belt. An electromagnetic clutch ensures high-torque transmission without slippage. Its specifications include a maximum shaft speed of 33 rpm and a recommended rudder-to-rudder time of 10 seconds (unloaded). The typical average power consumption ranges between 24 and 48 W at 12 V.

Installation and Compliance

Designed for mounting in an engine compartment, the M81135 rotary is protected for this use. It complies with CE 89/336/CE (EMC) and EN60945:1997 standards, as well as Directive 94/25/CE (RCD) and EN28846:1993. Installation requires a solid mounting structure and a dry location, as the unit is not waterproof. It is supplied with the rotary, a mounting base, and three spacing shims, requiring suitable mounting bolts, pinions, chain, and electrical connectors for full integration into the Raymarine autopilot system.

Documentation

Type	Nom
	EN - Installation Manual - Rotary Drive T1-12V
	EN - Declaration of Conformity - Rotary Drive T1-12V
	EN - Declaration of Conformity - Rotary Drive T1-12V
	EN - Declaration of Conformity

Expert opinion

Pol CONIN

Digital Manager

« Technical analysis of the Raymarine T1-12V rotary actuator for autopilots »

The Raymarine M81135 rotary drive of type 1 is an autopilot actuation solution specifically designed for small sailboats, typically those with a displacement not exceeding 10,000 kg. It integrates optimally with mechanical steering systems using chain and pinion, common in coastal cruisers or light racing sailboats. It serves as a lighter and less powerful alternative to type 2 models (M81136/M81137), which, with their 34 Nm torque, are reserved for heavier vessels up to 20,000 kg.

Installing this rotary drive requires careful attention to the mounting bracket's robustness, as it generates significant forces. Although the unit is designed to operate in an engine compartment, it is not waterproof and must be installed in a dry environment, protected from water spray or bilge leaks. Compliance with EMC installation guidelines is critical to prevent interference with other onboard electronic equipment. It is essential to acquire a suitable transmission chain, compatible pinions, and high-quality fasteners for a reliable connection to the existing steering system.

This model is a reliable component for a Raymarine autopilot system. It is important to verify compatibility with the autopilot computer and the boat's steering type before purchase. For cruising or racing sailboats with well-dimensioned steering and a displacement under 10 tonnes, the M81135 delivers smooth and quiet rudder response, contributing to comfortable and safe navigation.

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Rotary T1-12V

£1,667.52 GBP

£1,667.52 GBP ~~£1,834.26 GBP~~

Frequently Asked Questions

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For which type of sailboat is the Raymarine M81135 rotary drive suitable?

The Raymarine M81135 rotary drive is specifically designed for sailboats. It is ideal for vessels equipped with chain and pinion steering systems and supports a maximum displacement of 10,000 kg (22,000 lb).

What is the maximum output torque of the Raymarine M81135 rotary actuator?

The Raymarine M81135 rotary actuator provides a maximum output torque of 20 Nm (Newton-metres), equivalent to 180 lb.in.

Is the Raymarine M81135 rotary switch waterproof?

No, the Raymarine M81135 rotary switch is not waterproof. It is designed to be installed in an engine compartment or another dry location, protected from bilge water.

What are the power supply requirements for the Raymarine M81135 rotary drive?

The Raymarine M81135 rotary drive operates on a nominal voltage of 12 V. Its typical average power consumption ranges from 24 to 48 W.

What items are included with the Raymarine M81135 rotary drive and what additional items are required for installation?

The Raymarine M81135 rotary drive is supplied with the following items:

The rotary drive itselfA mounting bracketThree spacer blocks

For a complete installation, additional parts are required and are not included:

Appropriate mounting bolts and locking washers/nutsSuitable drive and steering system dowel pins and grub screwsAn appropriate drive chainSuitable cables and electrical connectors for the motor and clutch unit

Can the mounting orientation of the Raymarine M81135 rotary be adjusted?

Yes, the mounting orientation of the Raymarine M81135 rotary drive can be adjusted. The mounting bracket can be rotated 90 degrees to accommodate different positions. The unit can be mounted on either a vertical or horizontal surface. Additionally, the rudder direction can be corrected by reversing the polarity of the connections between the motor and the autopilot computer.

What are the main performance specifications of the Raymarine M81135 rotary drive?

The main performance specifications of the Raymarine M81135 rotary drive are:

Maximum boat displacement: 10 000 kg (22 000 lb)Maximum output torque: 20 Nm (180 lb.in)Maximum shaft speed: 33 rpmRecommended time between rudder stops (unloaded): 10 secondsTypical average power consumption: 24-48 W at 12 V

Is the Raymarine M81135 rotary drive compliant with safety and environmental standards?

Yes, the Raymarine M81135 rotary drive is compliant with several standards. It meets the CE 89/336/EEC (EMC) and EN60945:1997 directives for electromagnetic compatibility, as well as the 94/25/EEC (RCD) directive and EN28846:1993. It is also protected for use in engine compartments.