Belimo ZG-LMSA-1/2-5 Shaft Extension

The Belimo ZG-LMSA-1/2-5 Shaft Extension is a critical field-accessory engineered for LF and LM series actuators, specifically designed to bridge the gap in deep-set damper assemblies. This 5-inch extension accommodates a 1/2-inch OD damper shaft, providing the necessary clearance for actuators mounted away from the damper frame due to insulation or physical obstructions. Constructed from durable, corrosion-resistant materials, the ZG-LMSA ensures a rigid connection without introducing mechanical slop or hysteresis into the HVAC damper control sequence. For technicians performing retrofits or new installations, this component is essential for maintaining proper actuator mounting alignment. It integrates seamlessly with standard Belimo actuator accessories, allowing for precise damper shaft extension while preserving the torque delivery of the drive motor. By utilizing this OEM Belimo part, contractors ensure reliable operation of proportional control actuators in demanding air handling environments where shaft accessibility is limited.

Technical Benefits for Contractors

• Extended Reach: Provides a 5-inch length increase for 1/2-inch diameter shafts, solving clearance issues in insulated ductwork.
• Precision Fit: Engineered for LF and LM series actuators to eliminate shaft slippage and ensure accurate positioning.
• Mechanical Integrity: High-strength construction maintains torque transmission without flex, supporting long-term system reliability.
• Versatility: Simplifies field modifications and retrofits where the original shaft is insufficient for standard mounting.

Common Questions

Will this shaft extension work with non-Belimo actuators?
While designed specifically for the LF and LM series, it may interface with other actuators using a 1/2-inch clamp, though compatibility should be verified based on specific torque requirements.

Is this compatible with 3/4-inch shafts?
No, the ZG-LMSA-1/2-5 is strictly designed for 1/2-inch OD shafts. Using it on different diameters will lead to mechanical failure.

How does this impact the actuator torque rating?
When installed correctly, this extension does not significantly degrade the rated torque of compatible LF or LM actuators, provided the alignment remains true.

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.