Belimo KH12 Crankarm

The Belimo KH12 is a robust universal crankarm engineered for secure attachment to damper jackshafts and actuator assemblies. Specifically designed for 1.05 inch diameter shafts, this heavy-duty damper linkage component features a precision-machined 8.2 mm (21/64") slot width, making it fully compatible with KG10A ball joints and SH10 push rods. Its galvanized steel construction ensures superior mechanical integrity and corrosion resistance in demanding commercial HVAC control systems.

For technicians performing retrofits or custom builds, the KH12 provides a reliable solution when direct coupling is not feasible. It is widely used with Belimo AF, NFB, and GM series actuators to translate rotary motion into linear force for multi-section dampers. This HVAC actuator accessory facilitates precise torque transfer, ensuring the damper blades reach a full close or open position without mechanical slippage. Integrating the Belimo KH12 crankarm into your damper linkage hardware setup minimizes installation time while maintaining the high standards required for building automation systems (BAS).

• Universal Compatibility: Optimized for 1.05" diameter jackshafts, ensuring a tight grip even in high-torque applications.
• Robust Build: Fabricated from galvanized steel to provide long-term durability in plenum-rated environments.
• Precision Linkage: Features an 8.2 mm slot width designed for seamless integration with Belimo ball joints.
• Flexible Application: Essential for HVAC mechanical linkages where actuators must be offset from the damper shaft.

Which actuators are compatible with the KH12?
The KH12 is commonly paired with high-torque Belimo actuators, including the AF, NF, LF, and GM series, specifically for linkage-based installations.

Can this crankarm be used on square shafts?
While designed for 1.05" round shafts, it is critical to use the appropriate KH series crankarm for the specific shaft profile; the KH12 is the standard for 1.05" diameter round jackshafts.

What ball joint size fits the KH12 slot?
This crankarm is best utilized with the KG10A ball joint, which is sized for the 8.2 mm slot to ensure smooth operation without excessive play.

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.