Lau g078101512 Variable Pitch Pulley 4.15 in Od Single Groove

Product Description

The LAU g078101512 is a single-groove variable pitch pulley designed for use in HVAC belt-drive systems. With an outer diameter of 4.15 inches and a 0.75 inch bore, this pulley allows technicians to fine-tune blower speed and airflow by adjusting the effective pitch diameter. Variable pitch pulleys are a standard solution when balancing air distribution in forced-air systems without swapping out fixed sheaves. This unit ships individually and is suited for residential and light commercial air handling applications where belt-drive blower assemblies require field adjustment.

This pulley is used on belt-drive blower assemblies in forced-air furnaces, air handlers, and fan coil units. It is installed on the motor or blower shaft to drive a V-belt in single-groove configurations. Technicians select variable pitch pulleys when commissioning or rebalancing a system to dial in the correct CFM output. Box quantity is one unit per package.

Key Features

• 4.15 inch outer diameter for compatibility with standard V-belt drive configurations
• 0.75 inch bore fits common HVAC motor and blower shaft sizes
• Single-groove design accepts one V-belt
• Variable pitch construction allows field adjustment of effective drive ratio
• Sold individually, one unit per box

Compatibility

Designed as an OEM-style replacement or direct upgrade for single-groove belt-drive blower assemblies in residential and light commercial forced-air HVAC equipment.

Installation Notes

Installation should be performed by a qualified HVAC technician. Disconnect and lock out power to the air handler or furnace before servicing the belt-drive assembly. Ensure the bore fits the shaft properly and that the pulley is aligned with the mating sheave before tensioning the belt. Do not overtighten the belt, as excessive tension can damage motor bearings and reduce belt life.

Technical Specifications

• Outer Diameter: 4.15 inches
• Bore Size: 0.75 inches
• Number of Grooves: One
• Box Quantity: 1

Standard Information

• Brand: LAU
• Manufacturer Part Number: g078101512