Belimo K6-1 Clamp

The Belimo K6-1 is a critical mechanical accessory designed specifically for HVAC damper actuators, providing a robust interface between the drive motor and the damper shaft. As a veteran-grade jackshaft clamp, this reversible high-strength component expands the standard mounting capacity of Belimo LF series actuators. While the stock LF clamp typically handles shafts from 3/8-inch up to 1/2-inch, installing the K6-1 universal clamp allows for a wider clamping range of 1/2-inch to 3/4-inch (10mm to 20mm), ensuring a secure, slip-free grip on larger diameter shafts and jackshafts. Engineered from galvanized steel, this actuator hardware is built to withstand the torque requirements of spring-return applications without rounding or deforming over time. For contractors performing retrofits or new installations where shaft accessibility is limited, pairing the Belimo shaft clamp with an AV 10-18 extension ensures a professional, code-compliant damper linkage setup. This is the industry-standard solution for technicians needing to adapt low-torque actuators to larger industrial air handlers and dampers.

• Extended Compatibility: Increases the standard LF actuator shaft diameter capacity to accommodate 1/2-inch to 3/4-inch round or square shafts.
• Reversible Design: Feature-rich V-bolt assembly allows for mounting on either side of the actuator to suit tight mechanical room clearances.
• High-Torque Security: Provides a jagged, non-slip interior surface for a positive mechanical connection, preventing calibration drift in spring return actuators.
• Durable Construction: Heavy-duty galvanized steel housing resists corrosion and mechanical fatigue in high-humidity plenum environments.

Can I use the K6-1 on larger actuators like the AFB or NFB series?
No, the Belimo K6-1 is specifically engineered as a mechanical accessory for the LF series. High-torque actuators like the AFB or NFB utilize different clamp geometries (such as the K7-2) to handle their higher rotational force.

What tool is required for securing this clamp to the shaft?
You should use a 10mm wrench or socket. Consistent with standard HVAC maintenance practices, ensure the nuts are tightened to approximately 6-8 ft-lb to prevent shaft slippage while protecting the actuator's internal gear train.

Is this clamp required for using the AV 10-18 shaft extension?
Yes. To properly couple the AV 10-18 extension to an LF actuator, the K6-1 jackshaft clamp must be used to ensure the assembly meets the required technical specifications for stable operation.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.