Lau G078052546 Spoke Pulley 8.75 in Od 1 Groove

Product Description

The LAU G078052546 is a single-groove spoke pulley designed for use with Truflex 3L and 4L V-belts in belt-drive fan and blower assemblies. It features an outside diameter of 8.75 inches and a 1-inch bore with a light-duty bushing configuration. Pitch diameter measures 8.16 inches for 3L belts and 8.5 inches for 4L belts. The spoke construction reduces rotating weight while maintaining the structural integrity needed for HVAC air-handling applications. This pulley is typically installed by HVAC technicians and mechanical contractors servicing belt-driven blower systems.

This pulley is suited for residential and light commercial belt-drive blower applications where Truflex 3L or 4L V-belts are specified. It is commonly found in air handlers, furnace blower assemblies, and fan coil units that use adjustable or fixed-pitch drive systems. The 1-inch bore diameter accommodates standard blower shaft sizes common in these applications. The light-duty bushing style makes this pulley appropriate for lower-torque, moderate-speed fan drive configurations.

Key Features

• 8.75-inch outside diameter for use in larger-diameter drive configurations
• Single groove accepts Truflex 3L (3/8-inch wide) or 4L (1/2-inch wide) V-belts
• Pitch diameter of 8.16 inches for 3L belts and 8.5 inches for 4L belts
• 1-inch bore diameter with light-duty bushing for standard shaft fitment
• Spoke design reduces rotating mass compared to solid-web pulleys

Compatibility

Designed for use with Truflex 3L and 4L V-belts in belt-drive HVAC blower and fan applications requiring an 8.75-inch OD single-groove spoke pulley with a 1-inch bore.

Installation Notes

Installation should be performed by a qualified HVAC technician or mechanical contractor. Disconnect and lock out all electrical power to the air handler or blower unit before servicing the drive assembly. Verify shaft diameter and bushing fit before mounting, and confirm belt type and length match the selected groove profile. Inspect belt tension and alignment after installation to prevent premature wear.

Technical Specifications

• Outside Diameter: 8.75 inches
• Pitch Diameter (3L Belt): 8.16 inches
• Pitch Diameter (4L Belt): 8.5 inches
• Bore Diameter: 1 inch
• Number of Grooves: 1
• Compatible Belt Types: Truflex 3L, 4L
• Belt Width (3L): 3/8 inch
• Belt Width (4L): 1/2 inch
• Bushing Type: Light Duty
• Construction Type: Spoke

Standard Information

• Brand: LAU
• Manufacturer Part Number: G078052546