Lovejoy 68514427834 Variable Speed Pulley 1 Hp B Belt

Product Description

The LOVEJOY 68514427834 is a spring loaded variable speed pulley designed for use in belt-driven power transmission systems. Part of the Econoline series, this pulley provides automatic speed variation by adjusting the effective pitch diameter under load. It accommodates a B-series belt and delivers 1 horsepower at 1750 RPM or 3/4 horsepower at 1150 RPM. The outside diameter measures 6 inches, with a maximum pitch diameter of 5.65 inches and a minimum pitch diameter of 2.69 inches. The bore measures 7/8 inches inside diameter. Licensed HVAC and mechanical contractors install this type of component in air handling and fan drive applications where variable airflow control is required.

This variable speed pulley is suited for residential and light commercial fan and blower systems where belt-driven variable speed control is needed. It is commonly installed on direct-drive or belt-drive air handlers, ventilation fans, and similar rotating equipment. The Econoline series is a recognized line for cost-effective variable speed pulley applications in HVAC and general industrial settings. The spring-loaded design allows the sheave faces to move axially, automatically changing the drive ratio as system load changes without manual adjustment.

Key Features

• Spring-loaded design automatically adjusts pitch diameter for variable speed operation
• Accepts B-series belt for wide compatibility with standard drive configurations
• Minimum pitch diameter of 2.69 inches, maximum pitch diameter of 5.65 inches
• 6 inches outside diameter with 7/8 inches bore and 3/16 x 3/32 inch keyway
• Rated 1 HP at 1750 RPM and 3/4 HP at 1150 RPM
• Part of the Econoline series for reliable, economical variable speed drive solutions

Compatibility

Designed for use with B-series belts in belt-driven variable speed pulley applications. Verify bore size, keyway dimensions, and horsepower rating against the existing drive system before installation.

Installation Notes

Installation should be performed by a qualified mechanical or HVAC technician. Disconnect and lock out all power to the drive system before removing or installing any sheave or pulley components. Ensure the shaft diameter and keyway dimensions match the pulley bore and keyway specifications before pressing onto the shaft. Confirm belt alignment and tension according to the belt manufacturer's guidelines after installation.