Lovejoy 68514427867 Variable Speed Pulley 5HP B Belt

Product Description

The LOVEJOY 68514427867 is a spring loaded variable speed pulley designed for use in variable-speed belt drive systems where automatic speed adjustment under load is required. Part of the Econoline series, this pulley features a 7-inch outside diameter, a 6.65-inch maximum pitch diameter, and a minimum pitch diameter of 3.69 inches. The bore is 1-1/8 inches with a 1/4 x 1/8 inch keyway for positive shaft engagement. Rated at 5 HP at 1750 RPM and 3 HP at 1150 RPM, it is sized for light industrial and HVAC fan drive applications. Installation is typically performed by mechanical or HVAC technicians.

This variable speed pulley is suited for B-series belt drive applications in residential and light commercial HVAC systems, industrial blowers, and fan assemblies requiring variable airflow control. The spring loaded design automatically adjusts the pitch diameter in response to load changes, allowing belt-driven equipment to operate across a range of speeds without manual pulley changes. It is compatible with standard B-series V-belts and fits shafts requiring a 1-1/8-inch bore with keyway.

Key Features

• Spring loaded design automatically varies pitch diameter under changing load conditions
• Rated 5 HP at 1750 RPM and 3 HP at 1150 RPM for flexible drive application sizing
• 7-inch outside diameter with pitch diameter range of 3.69 to 6.65 inches
• 1-1/8-inch bore with 1/4 x 1/8 inch keyway for secure shaft mounting
• Designed for B-series V-belts as part of the Econoline series
• 4.13-inch face length accommodates standard B-belt widths

Compatibility

Designed for use with B-series V-belts. Compatible with shaft diameters of 1-1/8 inches requiring a keyway drive connection. Suitable for variable speed pulley applications in the Econoline series product family.

Installation Notes

Installation should be performed by a qualified mechanical or HVAC technician. Disconnect and lock out all power to the driven equipment before removing or installing any belt drive components. Verify shaft diameter, keyway dimensions, and belt trade size match the application requirements before installation. Follow applicable ANSI and OSHA standards for belt drive safety guarding after installation is complete.