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Raymarine

M81137

Rotary T2-24V

Designed for Raymarine autopilot systems, the Raymarine T2-24V (M81137) rotary drive is a Type 2 solution providing 34 Nm of torque for sailboats up to 20 000 kg. This 24V model is the most powerful in the rotary drive range, ideal for chain and pinion steering systems. The product includes the rotary drive, a mounting bracket, and three shims.

Retail priceBenefit from the professional rate

2.650,92€

2.650,92€ ~~2.916,00€~~

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In stock

Free pickup point shipping over €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	24
Max power consumption	120
Typical power consumption	72
Recommended fuse rating	7.5
Product width	274
Product height	195
Product depth	184
Mounting type	Mounted on pedestal
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
Max torque	34
Disengageable	Yes

Detailed description

Designed for Raymarine autopilot systems, the Raymarine T2-24V (M81137) rotary drive is a Type 2 solution for sailboats equipped with chain-and-pinion steering systems. This model is compatible with cable and rod steering, providing precise and responsive rudder control. It stands out with its ability to handle a maximum boat displacement of 20,000 kg (44,000 lb), making it suitable for larger vessels. Compared to the Type 1 (M81135, 12V), which handles 10,000 kg with 20 Nm of torque, and the Type 2 12V (M81136), which offers similar displacement capabilities but under 12V, the M81137 is distinguished by its 24V power supply and 34 Nm output torque.

Performance and technical design

The Raymarine T2-24V drive integrates a robust electric motor, a precision planetary gearbox, and a high-strength drive belt. Its electromagnetic clutch is designed to transmit high torque loads without slippage, ensuring stable steering. With a maximum shaft speed of 33 rpm and a recommended time from hard-over to hard-over of 10 seconds (unloaded), it offers responsiveness suited for navigation. Its average power consumption ranges from 72 to 120 W at 24V. The unit dimensions are 274 mm in length, 195 mm in height, with a mounting length of 256 mm and a mounting foot of 60 x 60 mm.

Installation and compliance

The unit is protected for use in engine compartments and complies with CE directives (89/336/EC EMC and 94/25/EC RCD), meeting EN60945:1997 and EN28846:1993 standards. Installation can be done on a vertical or horizontal surface, with the mounting foot rotatable by 90 degrees to adapt to available space. The steering direction can be corrected by reversing the polarity of the motor connections to the course computer. The product is supplied with the rotary drive, a mounting foot, and three shims. Stainless steel M12 mounting bolts, pinions, a chain, and suitable electrical connectors are required for a complete installation.

Documentation

Type	Nom
	EN - Installation Manual - Rotary Drive T2-24V
	EN - Declaration of Conformity - Type 2 24V Rotary Drive
	EN - Declaration of Conformity
	EN - Declaration of Conformity - Rotary Drive T2-24V

Expert opinion

Pol CONIN

Digital Manager

« Technical analysis: Raymarine Type 2 24V rotary drive »

The Raymarine M81137 rotary drive, Type 2 model in 24V, is a targeted technical solution for medium to large sailboats, with a displacement of up to 20,000 kg. Its power and torque of 34 Nm are specifically designed for chain-and-pinion steering systems, commonly found on cruising and racing boats where the robustness of the autopilot's servo control is critical.

Beyond its power specifications, the value of this model lies in its integration with 24V architectures, enabling electrical consistency and improved efficiency for onboard systems operating at this voltage. Installation requires careful attention to the mounting structure, as the force generated by the unit demands a solid support, potentially requiring specific reinforcement. Although it is protected for engine compartments, it is recommended to install it in a location not directly exposed to intense water spray or prolonged immersion to optimize its lifespan. It is essential to comply with EMC directives to ensure optimal performance of the entire navigation system, particularly regarding cable separation and electrical power supply.

This M81137 is positioned as the preferred option for owners of 24V sailboats from 10 to 20 tonnes seeking a reliable and high-performance rotary drive solution for their Raymarine autopilot, where 12V models or Type 1 units would be underpowered or less efficient.

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Rotary T2-24V

2.650,92€

2.650,92€ ~~2.916,00€~~

Frequently Asked Questions

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Which type of boat can use the Raymarine T2-24V (M81137) rotary drive?

The Raymarine T2-24V (M81137) rotary drive is designed for sailboats equipped with chain and pinion steering systems. It is suitable for boats with a maximum displacement of 20 000 kg (44 000 lb).

What is the output torque of the Raymarine T2-24V rotary drive?

The Raymarine T2-24V (M81137) rotary drive delivers a maximum output torque of 34 Nm (300 lb.in). Its maximum shaft speed is 33 rpm.

What is the required supply voltage and power consumption for the Raymarine Rotary T2-24V?

The Raymarine Rotary T2-24V (M81137) requires a 24V power supply. Its typical average power consumption ranges from 72 to 120 W.

Which steering systems is the M81137 rotary drive compatible with?

This drive is designed to operate with steering systems that can be actuated from the helm via a chain and pinion. This includes cable and rod steering systems.

What are the physical dimensions of the Raymarine T2-24V rotary drive?

The dimensions of the Raymarine T2-24V (M81137) rotary drive are as follows:

Length: 274 mm (10.8 in)Height: 195 mm (7.7 in)Mounting length: 256 mm (10 in)Mounting foot: 60 mm x 60 mm (2.4 in x 2.4 in)

What are the recommendations for installing the Raymarine M81137 rotary drive?

The drive can be mounted on a vertical or horizontal surface. The mounting foot can be rotated 90 degrees to fit the available space. It is crucial to secure it to a solid boat structure capable of withstanding the significant forces generated by the unit. The device must be installed in a dry location, protected from bilge water, as it is not waterproof. It is also recommended to ensure the unit remains accessible for future maintenance.

What components are included with the Raymarine T2-24V rotary drive and what is required for installation?

The components included with the Raymarine T2-24V (M81137) rotary drive are:

The rotary driveThe mounting bracketThree shimsFor a complete installation, additional parts are required, including:

Appropriate mounting bolts (M12 stainless steel)Lock washers or lock nutsSuitable pinions and grub screws for the drive and steering systemThread locking compoundAn appropriate drive chainSuitable cables and connectors for the drive motor and clutch

How can I register my Raymarine M81137 product for warranty?

To register your new Raymarine M81137 rotary drive and benefit from the full warranty, you can do so online on Raymarine's official website at the following address: www.raymarine.com.