Liebert B-069BS Sheave

The Liebert B-069BS Sheave is a high-grade HVAC blower pulley designed for precise power transmission in mission-critical Vertiv Liebert environmental control units. Featuring a 1 1/8" bore diameter, this sheave is engineered to maintain exact belt alignment, reducing vibration and preventing premature V-belt wear in high-static pressure applications. Built with heavy-duty materials, the B-069BS ensures consistent RPM regulation for blower motors, which is essential for maintaining the strict airflow requirements of data center cooling systems.

For technicians performing preventive maintenance, replacing a worn or "dished" sheave with this genuine OEM Liebert part restores drive-train efficiency and eliminates the mechanical squealing often associated with slipping belts. Its robust construction resists the frictional heat generated during continuous operation, protecting the motor shaft and bearings from unnecessary radial loads. Whether you are servicing a Liebert DS or a standard industrial air handler, the Liebert B-069BS provides the reliable power transmission required to minimize downtime and optimize energy consumption.

• Precision 1 1/8" Bore: Ensures a secure, slip-free fit on standard HVAC blower motor shafts.
• Enhanced Belt Traction: Properly machined grooves maximize V-belt contact, preventing power loss and heat buildup.
• Durable Industrial Build: Engineered to withstand the rigorous duty cycles of 24/7 data center cooling environments.
• System Compatibility: Direct replacement for the Liebert B-069BS, ensuring seamless integration with existing drive components.
• Vibration Reduction: Balanced design minimizes mechanical noise and extends the service life of motor bearings.

What are the signs that my Liebert sheave needs replacement?
Visual "dishing" or concave wear in the groove walls indicates the part is no longer making full contact with the belt. You may also notice persistent belt squealing or frequent HVAC belt replacements despite proper tensioning.

Is the Liebert B-069BS compatible with non-Liebert air handlers?
While designed specifically for Liebert/Vertiv units, this sheave can be used in any industrial application requiring a 1 1/8-inch bore sheave, provided the outer diameter and belt profile match your system's specifications.

How do I ensure proper alignment when installing this pulley?
Always use a laser alignment tool or a straight edge across the faces of both the motor sheave and the fan pulley. Misalignment can lead to rapid belt failure and increased energy costs.

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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.