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Raymarine

M81136

Rotary T2-12V

Designed for chain-and-pinion steering systems, the Raymarine T2-12V M81136 rotary drive is a Type 2 autopilot motor for boats up to 20,000 kg, delivering 34 Nm of torque at 12V. This model, with documentation dated 2006, is an older reference in the Raymarine range, offering higher power than the Type 1. It is supplied with the rotary unit, its mounting bracket, and three spacer blocks.

Retail priceBenefit from the professional rate

$2,699.78 USD

$2,699.78 USD ~~$2,890.35 USD~~

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In stock

Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

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Installers near you

thanks to our network of approved installers

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Support service

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Technical specifications

Operating voltage	12
Max power consumption	84
Typical power consumption	60-84
Product width	274
Product height	195
Product depth	256
IP rating	Non-waterproof
Bus compatibility	None
Wired network	None
Wireless connectivity	None
Mounting type	Surface mount
Certifications	CE, EN60945
Drive unit type	Rotary Type 2
Hard-over time	10
Mounting hardware included	No
Mounting orientation	Vertical or horizontal
Integrated rudder angle sensor	No
RF300 rudder feedback	No
Max torque	34
Disengageable	Yes

Detailed description

The Raymarine Rotary T2-12V M81136 is a drive unit designed for Raymarine autopilot systems. It is specifically suited for boat steering systems operated from the helm via a chain and pinion, such as cable and rod steering systems.

Design and technical performance

This Type 2 rotary drive integrates a robust electric motor, a precision epicyclic gearbox driven by a high-strength belt, and an electromagnetic clutch. This configuration allows high torque loads to be transmitted without slippage, ensuring smooth and powerful steering. With a nominal voltage of 12V, the M81136 model is suitable for boats up to 20,000 kg (44,000 lb) displacement. It delivers a maximum output torque of 34 Nm (300 lb.in) and achieves a maximum shaft speed of 33 rpm. The recommended time from hard-over to hard-over in neutral is 10 seconds, with a typical average electrical consumption of 60 to 84 W.

Positioning in the Raymarine range

The Raymarine Rotary T2-12V differs from the Type 1 model (M81135), also 12V, which is designed for boats up to 10,000 kg with 20 Nm torque and 24-48 W consumption. The M81136 therefore offers higher load capacity and torque, positioning it for larger vessels. It shares its performance specifications with the Type 2 24V model (M81137), the main difference being supply voltage and associated consumption (72-120 W for 24V). Its design complies with CE 89/336/EC (EMC) and EN60945:1997, and 94/25/EC (RCD) and EN28846:1993 standards, and it is protected for use in engine compartments.

Documentation

Type	Nom
	EN - Installation Manual - Rotary Drive T2-12V
	EN - Declaration of Conformity - Rotary Drive T2-12V
	EN - Declaration of Conformity - Type 2 12V Rotary Drive
	EN - Declaration of Conformity - Rotary Drive T2-12V

Expert opinion

Pol CONIN

Digital Manager

« Technical analysis of the Raymarine Type 2 12V rotary drive for autopilot »

The Raymarine Type 2 12V (M81136) is a drive unit for autopilot systems designed for medium to large vessels, specifically those equipped with chain and pinion steering systems. Its ability to handle a displacement of up to 20,000 kg and provide a torque of 34 Nm makes it a relevant choice for cruising or racing sailboats requiring substantial steering power.

During installation, it is critical to note that this unit is not waterproof. It must be mounted in a dry engine compartment, protected from water spray or stagnant bilge moisture. The flexible 90-degree swivel mounting base facilitates integration in tight spaces, whether on a horizontal or vertical surface. However, the mounting structure must be robust, as the unit generates significant torsional forces. It is recommended to secure it to a substantial frame member to prevent vibration or structural degradation.

Compared to the Type 1 (M81135), the Type 2 offers a significant margin in boat weight and available torque, making it suitable for heavier vessels or those operating in more demanding conditions. It is essential to follow EMC guidelines to ensure optimal performance, particularly by respecting minimum distances from radio transmission equipment. While installation is feasible, it is complex and requires expertise in pinion alignment, chain tension, and electrical connections, justifying the recommendation to use a Raymarine professional. This product is intended for owners seeking a powerful and reliable autopilot drive unit, provided installation complies with its environmental requirements.

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Rotary T2-12V

$2,699.78 USD

$2,699.78 USD ~~$2,890.35 USD~~

Frequently Asked Questions

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For which displacement sailboat is the Raymarine T2-12V M81136 rotary drive suitable?

The Raymarine T2-12V M81136 rotary drive is designed for sailboats with a maximum displacement of 20 000 kg (44 000 lb).

What are the key technical specifications of the Raymarine T2-12V rotary drive?

The Raymarine M81136 T2-12V rotary drive has the following technical specifications:

Nominal voltage: 12V
Maximum output torque: 34 Nm (300 lb.in)
Maximum shaft speed: 33 rpm
Recommended time from stop to stop (no load): 10 seconds
Typical average power consumption: 60 to 84 W

With which types of steering systems is the T2-12V rotary compatible?

This rotary is specifically designed for boat steering systems operated from the helm via a chain and pinion. This includes, for example, cable and rod steering systems.

What are the mounting requirements for the T2-12V rotary on the boat?

The T2-12V rotary must be mounted on a solid boat structure, such as a substantial frame member. It can be installed on a vertical or horizontal surface. The mounting foot can be rotated 90 degrees to facilitate installation. It must be mounted in a dry location, protected from bilge water, as it is not waterproof. Additionally, it must be accessible for future maintenance.

Which items are included with the Raymarine T2-12V M81136 rotary drive?

Upon purchase, the Raymarine T2-12V M81136 rotary drive is supplied with the following items:

The rotary drive itselfA mounting bracketThree spacer blocks

What is the difference between the T2-12V rotary (M81136) and other Raymarine models?

The T2-12V rotary (M81136) differs from other Raymarine models as follows:

Compared to the Type 1 (M81135, 12V): The M81136 is designed for larger boats (up to 20,000 kg vs. 10,000 kg) and offers higher output torque (34 Nm vs. 20 Nm), with higher power consumption (60-84 W vs. 24-48 W).Compared to the Type 2 (M81137, 24V): The M81136 shares the same performance specifications (maximum displacement, torque, shaft speed) but operates at 12V, whereas the M81137 requires a 24V power supply and has a power consumption of 72-120 W.

What are the recommendations for the electrical installation of the Raymarine T2-12V rotator to ensure EMC compliance?

For optimal EMC performance and safety, it is recommended to follow these guidelines during electrical installation:

Ensure the power supply is turned off before starting the installation.Maintain the rotator and its cables at least 1 meter (3 feet) away from any equipment transmitting radio signals (e.g., VHF radios, cables, and antennas). For SSB radios, this distance must be increased to 2 meters (7 feet).Keep the rotator more than 2 meters (7 feet) away from a radar beam path.Power the equipment from a separate battery from the one used for engine starting.Use the cables specified by Raymarine.The suppression ferrites provided must not be removed. If they are removed for installation, they must be reassembled in the same position.If the equipment is connected to another device via a cable not supplied by Raymarine, a suppression ferrite MUST be attached to the cable near the Raymarine unit.

Is it possible to adjust the direction sense after installation of the T2-12V rotary actuator?

Yes, the direction sense of the T2-12V rotary actuator can be corrected after installation by reversing the polarity of the motor connections at the course computer level.