Lovejoy 68514427094 Variable Speed Pulley Econoline

Product Description

The LOVEJOY 68514427094 is a spring loaded variable speed pulley designed for belt-driven power transmission applications in HVAC, industrial, and mechanical systems. Part of the Econoline series, it features a 1.72 inch minimum pitch diameter and a 4.65 inch maximum diameter, allowing the drive ratio to vary as load and speed demands change. The pulley accommodates a 3/4 inch bore with a 3/16 x 3/32 inch keyway for secure shaft mounting. It is rated at 0.5 horsepower at 1750 RPM and 0.333 horsepower at 1150 RPM, making it suitable for light-duty variable speed drive setups. Mechanical contractors and HVAC technicians are the typical installers.

This variable speed pulley is used in residential and light commercial belt-drive systems where adjustable output speed is required without changing the motor. Common applications include blower assemblies, fan drives, and other rotating equipment that use B-series V-belts. The 3.5 inch face length and 5 inch outside diameter suit standard sheave configurations found in packaged and split HVAC equipment, as well as general industrial machinery requiring variable drive ratios within the Econoline series specification range.

Key Features

• Spring loaded design automatically adjusts pitch diameter for variable speed output
• Minimum pitch diameter of 1.72 inches and maximum diameter of 4.65 inches provide a usable speed range
• 5 inch outside diameter with 3.5 inch face length fits standard sheave envelopes
• 3/4 inch bore with 3/16 x 3/32 inch keyway for positive shaft engagement
• Compatible with B-series V-belts per standard belt trade sizing
• Rated at 0.5 HP at 1750 RPM and 0.333 HP at 1150 RPM for light-duty drives

Compatibility

Designed for use with B-series V-belts in variable speed belt-drive assemblies. Part of the Econoline series of variable speed pulleys for light-duty power transmission applications.

Installation Notes

Installation should be performed by a qualified mechanical or HVAC technician. Disconnect and lock out all power to the drive system before handling any sheave or pulley components. Verify shaft diameter and keyway dimensions match the bore and keyway specification before mounting. Ensure proper belt tension and alignment after installation in accordance with the equipment manufacturer guidelines and applicable ANSI or OSHA standards for rotating machinery.