Ruland Aluminium Clamp Style Flexible Bellows Coupler Clamp 25.4 mm OD, 8 mm x 6 mm Bore, 33.3 mm Length MBC25-8-6-A

Ruland MBC25-8-6-A is a precision-engineered aluminium clamp-style flexible bellows coupler designed for high-performance mechanical power transmission systems. Featuring a 25.4 mm outer diameter and bore sizes of 8 mm and 6 mm respectively, this coupler has an overall length of 33.3 mm. The stainless steel bellows provide torsional rigidity while accommodating angular misalignment up to 1.5°, parallel misalignment up to 0.1 mm, and axial misalignment up to 0.3 mm. These features reduce vibration and ensure smooth power transmission at speeds up to 10,000 RPM.

Constructed from anodized aluminum hubs, the coupler is lightweight with a low moment of inertia of 2.751 x 10⁻⁶ kg/m², making it ideal for dynamic and stepper motor applications where precision is critical. The clamp style ensures easy installation with zero backlash, improving responsiveness in servo and encoder systems. Operating temperature ranges from -40°C to 93°C, supporting use in various industrial environments.

Hardware included complies with DIN 912 12.9 standards, exceeding usual torque ratings with a guaranteed torque capability of 6.8 Nm. The assembly is manufactured under stringent quality controls in the United States, using solid bar stock exclusively sourced from North American mills, ensuring reliability and consistency.

Constructed with anodized aluminum hubs for lightweight and durability. Clamp style design ensures secure shaft connection and zero backlash. Stainless steel bellows allow for angular, parallel, and axial misalignment compensation.

Rated for torque up to 6.8 Nm and maximum speed of 10,000 RPM. Suitable for precise positioning applications such as stepper motors and encoders. Operates reliably from -40°C to 93°C temperature range. Moment of inertia is low at 2.751 x 10⁻⁶ kg/m² enhancing dynamic response.

Manufactured in the United States with bar stock sourced from North American mills. Metric hardware that exceeds DIN 912 12.9 standards for torque capability.

This flexible bellows coupler is widely employed in industrial machinery, automation, servo control, instrumentation, and robotics applications. Its precise manufacturing and torsional rigidity make it a preferred choice in laboratory instruments, HVAC systems, manufacturing automation, and fluid power tools.

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