Lovejoy 68514427096 Variable Speed Pulley 4.65 in

Product Description

The LOVEJOY 68514427096 is a spring loaded variable speed pulley designed for use in belt-driven mechanical power transmission systems. It automatically adjusts pitch diameter in response to load and speed changes, allowing continuous variable speed control without manual intervention. The pulley has a minimum pitch diameter of 1.72 inches, a maximum outside diameter of 4.65 inches, and an overall length of 3.5 inches. The bore is 0.5 inches to accept a standard shaft. Rated at 0.5 horsepower at 1750 RPM and 0.333 horsepower at 1150 RPM, it is suitable for light-duty industrial and HVAC blower drive applications. Installation is typically handled by millwrights, HVAC mechanics, or industrial maintenance technicians.

This variable speed pulley is used in applications where adjustable belt drive ratios are required without stopping the system for manual pulley changes. Common installation scenarios include HVAC air handling units, fan drives, and light industrial equipment where motor speed output must be varied to match load requirements. The spring-loaded mechanism maintains belt tension across the operating speed range, reducing belt slip and wear. It is suited for single-groove belt drive configurations on motors with standard shaft diameters of 0.5 inches.

Key Features

• Spring loaded design provides automatic pitch adjustment for continuous variable speed control
• Minimum pitch diameter of 1.72 inches and maximum outside diameter of 4.65 inches
• Overall length of 3.5 inches with a 0.5 inch bore for standard shaft fitment
• Rated at 0.5 HP at 1750 RPM and 0.333 HP at 1150 RPM
• Maintains belt tension across the variable speed range to reduce wear and slippage

Compatibility

Designed as an OEM-style replacement or direct-fit variable speed pulley for single-groove belt drive systems using a 0.5 inch shaft bore in HVAC and light industrial equipment.

Installation Notes

Installation should be performed by a qualified HVAC technician or industrial maintenance mechanic. Disconnect and lock out all electrical power to the motor before servicing any belt drive components. Verify shaft diameter and keyway dimensions before mounting. Ensure proper belt alignment and confirm the belt type is compatible with the pulley groove profile before returning the system to service.