Belimo KH8 Universal Crankarm

The Belimo KH8 Universal Crankarm is a critical mechanical accessory engineered for precise HVAC damper control and linkage applications. Constructed from high-grade galvanized steel, this damper crank arm is designed to provide professional-grade durability and corrosion resistance in stationary heating, ventilation, and air conditioning systems. It features a standardized 8.2 mm slot width, making it fully compatible with the Belimo KG8 ball joint for seamless power transmission from the actuator to the damper shaft. With a versatile clamping range of 10 mm to 18 mm (3/8" to 11/16"), the KH8 ensures a secure, slip-free attachment to a variety of round and square shafts. This universal crankarm is essential for contractors performing actuator retrofit solutions or new damper linkage installations where direct coupling is not feasible. By maintaining rigid alignment, it prevents mechanical play and ensures accurate positioning across the full 90-degree stroke of the actuator, optimizing overall system airflow performance.

Key Benefits for HVAC Contractors

• Universal Compatibility: Fits a broad range of damper shaft sizes from 10 mm to 18 mm, reducing the need for multiple stocked parts.
• Heavy-Duty Construction: Manufactured from galvanized steel to withstand high-torque applications without bending or fatiguing.
• Precision Linkage: Specifically optimized for use with KG8 ball joints to eliminate mechanical backlash in HVAC actuator linkages.
• Flexible Application: Compatible with a wide array of Belimo actuator series, including LF, NF, AF, and SM models.

Common Questions

What is the maximum shaft diameter the KH8 can accommodate?
The Belimo KH8 is designed to clamp onto shafts ranging from 10 mm to 18 mm (approximately 3/8" to 11/16"). For shafts larger than 1.05", a KH12 or similar large-bore crankarm should be utilized.

Can this crankarm be used for both round and square shafts?
Yes, the universal clamping design allows for secure mounting on both round damper shafts and square shafts within the specified 10-18 mm range.

Is the KH8 compatible with the KG10A ball joint?
No, the KH8 features an 8.2 mm slot width designed for the KG8 ball joint. For larger ball joints like the KG10A, which require a wider slot, you must use a compatible crankarm such as the KH10.

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.