Browning 1045996 Variable Pitch Sheave 2 Groove 5.35in Od

Product Description

The BROWNING 1045996 is a two-groove variable pitch sheave designed for use in belt-drive systems where speed ratio adjustability is required. Manufactured from cast iron, this sheave accepts 3L, 4L, 5L, A, and B section V-belts and mounts on a 1.125-inch bore shaft. The outside diameter measures 5.35 inches with a sheave thickness of 3 inches and a face width range of 1.375 to 2 inches. Adjusting the sheave pitch diameter allows a technician to fine-tune driven equipment speed without changing the belt or drive components. It weighs 7.05 pounds.

This sheave is used in HVAC fan drives, blower assemblies, industrial machinery, and other belt-driven applications where variable speed adjustment is needed during commissioning or seasonal tuning. The two-groove configuration supports dual-belt drive arrangements, which distribute load and reduce belt slippage on higher-torque applications. A licensed HVAC technician or millwright typically installs this component in air handling units, exhaust fans, and similar rotating equipment.

Key Features

• Two-groove design accepts 3L, 4L, 5L, A, and B section V-belts
• Variable pitch construction allows on-site speed ratio adjustment
• Cast iron construction for durability in belt-drive service
• 1.125-inch bore diameter for direct shaft mounting
• Face width adjustable from 1.375 to 2 inches to set pitch diameter
• Pitch diameter range supports belt sizes from 3.9 to 5.3 inches depending on belt section

Compatibility

Designed as an OEM-style replacement or new-install variable pitch sheave for belt-drive systems using 3L, 4L, 5L, A, or B section V-belts with a 1.125-inch bore shaft requirement.

Installation Notes

Installation should be performed by a qualified HVAC technician or millwright. Disconnect and lock out all power to the drive system before removing or installing any sheave. Ensure the shaft is clean and free of burrs before pressing or sliding the sheave into position, and verify that mating sheaves are properly aligned to prevent premature belt wear. Belt tension should be set according to the belt manufacturer's specifications after pitch diameter adjustment is complete.