3MR-300-12 Belt

This is an original Raymarine spare part (reference N006). It is a toothed belt designed to ensure precise mechanical transmission within your marine navigation equipment.

This belt meets the 3MR industrial standard. Its technical dimensions are:

Pitch length: 300 mmWidth: 12 mmPitch: 3 mm

Choosing the OEM part ensures perfect geometric fit. Unlike generic belts, it maintains nominal tension, prevents slippage on pulleys, and avoids premature wear on motor shafts.

Yes, it is made from robust materials suitable for marine equipment. It offers excellent resistance to wear, temperature variations, and saltwater environment.

The serrated profile (with a 3 mm pitch) perfectly matches the pulleys in your drive system. This prevents slippage and ensures highly precise motion transmission, essential for the proper operation of navigation instruments.

This belt is very light, weighing about 9 grams, which does not add significant weight to your navigation equipment’s mechanism while maintaining high strength.

Replace the belt if you notice it is slack, cracked, or frayed. Unusual slippage or a loss of precision in your drive system are also signs of advanced wear.

Maintenance primarily consists of regular visual inspections. Ensure it remains clean, free of salt buildup or debris that could damage the device’s teeth or pulleys.

No, you must never grease or lubricate a toothed belt of this type. It must operate dry to ensure proper grip on the pulleys and prevent any slipping in the system.

It is compatible with Raymarine drive systems requiring a 3MR-300-12 belt (reference N006), commonly used on Raymarine linear and rotary actuators.

To confirm compatibility, consult your Raymarine equipment manual. Look for the spare part reference N006 or the dimensions 3MR-300-12 in the technical nomenclature.

Although it complies with an industry standard (3MR, 300mm long, 12mm wide), it is specifically certified for Raymarine equipment. Its use on other brands is possible if the specifications are strictly identical, but it is recommended to follow your manufacturer's instructions.

Yes, this type of drive belt is commonly used in Raymarine wheel drive mechanisms, where angular precision is critical for maintaining course.

Installation requires opening the drive unit housing, releasing the adjustment mechanism, removing the old belt, then installing the new one while ensuring the notches align with the pulleys before readjusting the tension.

Generally, only standard hand tools (screwdriver, Allen keys) are required to remove the protective cover and access the belt tensioning system.

Voltage must be adjusted according to the recommendations in your equipment's manual. A belt that is too loose may slip, while an over-tensioned belt can strain the engine shaft and cause premature wear.

If the new belt slips, immediately check the tension applied during installation. Also ensure the pulleys are not worn or clogged, which could prevent the teeth from meshing properly.

Yes, the replacement can be performed by the user by carefully following the device’s manual. However, if there is any doubt about the tension adjustment, it is advisable to consult a qualified marine technician.

At sea, an autopilot drive failure can be very disruptive. Keeping a spare N006 belt on board is part of preventive maintenance and allows for quick repair in case of sudden failure.

The Raymarine 3MR-300-12 belt is an OEM spare part, identified by the manufacturer reference N006, designed to ensure precise mechanical transmission within your marine navigation equipment. Here are its main technical specifications:

Industrial standard: 3MRPitch: 3 mmNominal length: 300 mmWidth: 12 mmWeight: 0.1 kgIt is manufactured using robust materials to provide increased resistance to wear, thermal variations, and saline environments, thus ensuring the maintenance of its nominal tension and preventing slippage on toothed pulleys.