Lovejoy 68514427835 Variable Speed Pulley 1 Hp B Belt

Product Description

The LOVEJOY 68514427835 is a spring loaded variable speed pulley designed for use in belt-driven mechanical power transmission systems. Part of the Econoline Series, this pulley features a 5.65-inch maximum diameter, a 2.69-inch minimum pitch diameter, and an overall length of 4.13 inches. The 1-inch bore is machined with a 1/4 x 1/8 inch keyway for positive shaft engagement. Rated at 1 HP at 1750 RPM and 3/4 HP at 1150 RPM, it suits light industrial and HVAC fan drive applications where variable speed control is required. Licensed HVAC technicians and mechanical contractors are the typical installers.

This pulley is intended for use in systems requiring adjustable-speed belt drives, including residential and light commercial HVAC air handling units, blower assemblies, and general-purpose machinery. It accepts a B-series V-belt and provides variable speed output through its spring loaded sheave design. The Econoline Series is commonly specified in replacement and retrofit scenarios where an OEM-style variable speed drive component is needed. The 6-inch outside diameter and 1-inch inside bore make it compatible with standard shaft configurations in these applications.

Key Features

• Spring loaded variable speed sheave design allows on-the-fly speed adjustment without belt changes
• Accepts B-series V-belt for broad compatibility with standard drive configurations
• 1/4 x 1/8 inch keyway provides positive, slip-resistant shaft engagement
• Rated 1 HP at 1750 RPM and 3/4 HP at 1150 RPM for reliable light-duty drive performance
• Econoline Series construction balances durability and cost-effectiveness in replacement applications
• 1-inch bore fits common shaft sizes found in HVAC blower and fan assemblies

Compatibility

Designed as an OEM-style replacement variable speed pulley for B-series belt drive systems in residential and light commercial HVAC and general mechanical power transmission applications.

Installation Notes

Installation is typically performed by a licensed HVAC technician or qualified mechanical contractor. Disconnect and lock out all power to the drive system before removing or installing the pulley. Ensure the shaft and keyway are clean and free of burrs before seating the pulley, and verify belt alignment and tension after installation per the equipment manufacturer guidelines. Refer to applicable mechanical and electrical codes for the installation jurisdiction.