As a safety-critical auxiliary limit switch

Field-Ready Identification: The red color coding allows for rapid verification of the spring range by technicians during multi-unit service calls

Reliable Switching: SPST contact configuration designed for low-voltage control circuits

and lighting automation

Durable Construction: Engineered to withstand high-cycling environments within the furnace plenum for long-term reliability

Trane ARM0058 Crank Arm As a safety-critical auxiliary limitThe Trane ARM0058 Crank Arm is a critical OEM component designed for high precision HVAC damper linkage systems. Featuring a specific . 38" diameter bore, this crank arm is engineered to integrate seamlessly with Trane actuator assemblies and linkage rods, ensuring reliable torque transfer in variable air volume (VAV) and rooftop unit (RTU) applications. As a direct OEM replacement part, the ARM0058 eliminates the alignment issues common with