KMC Controls VTD-1415 Crankarm

The KMC Controls VTD-1415 Crankarm is a fundamental accessory for pneumatic and electronic actuator assemblies, specifically engineered for 1/2-inch diameter shafts. As a precision-machined 3-hole short crankarm, this component facilitates the mechanical linkage between the actuator and the damper or valve assembly, ensuring reliable torque transfer and stroke adjustment. Field technicians frequently utilize the VTD-1415 as a direct 21-806 cross-reference replacement, maintaining system integrity without requiring extensive linkage reconfiguration. Its robust construction is designed to withstand the repetitive cycling inherent in HVAC building automation systems. By utilizing the multiple mounting holes, contractors can fine-tune the mechanical advantage and stroke length to meet specific terminal unit or air handler requirements. This KMC pneumatic fitting is essential for restoring precise control in legacy and modern damper actuator linkages, providing a secure, non-slip attachment to the drive shaft.

• Universal 1/2" Bore: Precision-sized for standard 1/2-inch drive shafts found across various actuator brands.
• 3-Hole Adjustment: Multiple attachment points allow for varied linkage positioning to optimize mechanical leverage.
• Direct Interchangeability: Fully compatible and identical to part number 21-806, simplifying inventory and field replacements.
• Compact Profile: The short-arm design is ideal for tight mechanical rooms and constrained plenum spaces.
• Industrial Durability: Engineered to maintain rigorous tolerances in high-duty cycle pneumatic control applications.

Is the VTD-1415 compatible with 1/2" round shafts?
Yes, this crankarm is specifically designed to secure onto 1/2-inch shafts. It is commonly used in damper linkage kits to connect the actuator to the damper rod.

Can I use the VTD-1415 to replace a 21-806 part?
Absolutely. The KMC VTD-1415 is technically identical to the 21-806, making it a drop-in replacement for existing setups without needing to modify the stroke or brackets.

What is the purpose of the three holes on the crankarm?
The three holes provide different pivot points. This allows a technician to adjust the actuator stroke and torque ratio relative to the damper or valve opening, ensuring full closure and precise modulation.

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.