Schneider Electric (Barber Colman) AM-113 Crank Arm

The Schneider Electric (Barber Colman) AM-113 Crank Arm is a heavy-duty linkage component engineered for demanding HVAC applications. This 1/2 inch crank arm is specifically designed to interface with damper or splined actuator shafts, providing a secure, non-slip mechanical connection necessary for precise airflow modulation. Featuring a zinc plated finish, this component is built to resist corrosion in high-humidity environments typical of air handling units. As a versatile damper linkage part, it facilitates the translation of rotational force from the actuator to the damper assembly. Field technicians frequently utilize the AM-113 as a reliable damper actuator accessory to ensure linear stroke consistency and robust torque transfer. This professional-grade HVAC crank arm replacement is the direct substitute for legacy Barber Colman A-3767 and EYCC-518 models, making it an essential stock item for maintaining older pneumatic or electric valve and damper systems.

Key Benefits

• Universal Shaft Compatibility: Precision-fit for 1/2" diameter shafts, supporting both standard round damper shafts and specialized splined actuator outputs.
• Industrial-Grade Durability: The zinc plated steel construction prevents oxidation and surface degradation in harsh mechanical rooms.
• Verified Cross-Reference: Serves as the official direct replacement for A-3767 and EYCC-518, eliminating the need for complex field modifications.
• High Torque Transfer: Designed to maintain mechanical integrity under high-static pressure conditions without slipping or stripping.

Common Questions

Will this work with non-Schneider actuators?
While optimized for Schneider Electric and Barber Colman hardware, the AM-113 is compatible with any 1/2" damper or splined actuator shaft that meets the standard diameter specifications.

Can I use this for both damper and valve linkages?
This part is primarily designed for damper linkages; however, it is frequently used in HVAC valve linkage assemblies where a 1/2" crank arm is specified for mechanical stroke adjustment.

How do I secure the AM-113 to a smooth shaft?
The AM-113 crank arm typically utilizes a set screw or clamping mechanism to provide a high-friction bite onto 1/2" shafts, ensuring the linkage does not drift during high-duty cycle 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.