Ruland 25.4 mm OD 8 mm Bore, 38.1 mm Length Aluminium Clamp Flexible Coupler FCMR25-8-6-A

Ruland FCMR25-8-6-A is a precision-engineered flexible coupler with aluminium clamp style, designed specifically for light duty power transmission such as coupling servo motors to lead screws. The coupler features bores of 8 mm and 6 mm, an outer diameter of 25.4 mm, and length of 38.1 mm.

Manufactured from high strength 7075-T651 extruded drawn aluminium bar, it provides a lightweight solution with low moment of inertia (4.12 x 10^-6 kg/m²), enabling rapid acceleration and deceleration in dynamic machinery.

The six beam coupling design includes two sets of three spiral cuts to enhance the torque capacity and reduce windup, offering zero-backlash performance. It supports misalignments of 3 degrees angular, 0.38 mm parallel, and 0.25 mm axial displacement, which helps accommodate mechanical tolerances and reduces stress on connected components.

This coupling operates reliably at speeds up to 6000 rpm with a torque rating of 3.73 Nm and is secured using metric M4 screws featuring Nypatch® anti-vibration hardware to prevent galling and ensure consistent clamping force.

The operating temperature range from -40°C to 107°C makes it suitable for various industrial environments. Its manufacturing process uses North American sourced aluminium bar stock ensuring consistent quality and performance.

Compliant with REACH, DIN 912 12.9, and RoHS3 standards, the coupling meets rigorous industry requirements for mechanical power transmission devices. This coupler is widely used in industrial, manufacturing, automation, and laboratory applications requiring precision shaft coupling with minimal backlash and vibration.

Designed for maximum speed of up to 6000 rpm ensuring efficient rotational performance. Torque rating of 3.73 Nm providing reliable transmission of power. Constructed from 7075-T651 extruded drawn aluminium bar for lightweight and low inertia.

Misalignment tolerances include 3° angular, 0.38 mm parallel, and 0.25 mm axial for flexible coupling applications. Equipped with metric M4 screws and Nypatch® anti-vibration hardware for high holding power and reduced screw galling.

Operates effectively within temperature ranges of -40°C minimum to 107°C maximum. Machined from a single piece with two sets of three spiral cuts to reduce windup and vibration at high speeds. Complies with REACH, DIN 912 12.9, and RoHS3 standards ensuring quality and safety.

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