Browning 1033471 Two Groove Cast Iron Sheave 1 Inch Bore

Product Description

The BROWNING 1033471 is a two-groove, finished-bore cast iron sheave designed for use in V-belt drive systems common to HVAC, industrial, and mechanical power transmission applications. The sheave features a 1 inch finished bore diameter and a 4.25 inch outer diameter, with a belt pitch B diameter of 3.9 inches and a pitch diameter for 4L or A-type belts of 3.5 inches. Machined from cast iron for durability and dimensional stability, this sheave is sized for straightforward installation without additional boring or machining. It is typically installed by HVAC technicians or millwrights maintaining fan and blower drive assemblies.

This sheave is suited for residential and light commercial HVAC applications, particularly in belt-driven blower and fan assemblies where A-type or 4L-type V-belts are used. The finished bore and dual-groove configuration make it appropriate for direct replacement in standard two-belt drive setups. Installation typically involves pairing with a matching sheave and properly tensioned V-belts to maintain correct fan or blower speed ratios.

Key Features

• Two-groove configuration supports dual V-belt drive setups
• Finished 1 inch bore diameter — no additional machining required
• 4.25 inch outer diameter with 3.9 inch belt pitch B diameter
• Compatible with 4L-type and A-type V-belts at 3.5 inch pitch diameter
• Cast iron construction for rigidity and long service life in belt drive applications
• Overall bore length of 1-15/32 inches for proper shaft engagement

Compatibility

Designed as an OEM-style replacement sheave for belt-driven blower and fan assemblies using A-type or 4L-type V-belts in residential and commercial HVAC and power transmission systems.

Installation Notes

Installation should be performed by a qualified HVAC technician or millwright. Shut down and lock out all power to the drive system before removing or installing the sheave. Ensure the bore is fully seated on the shaft and secure with the appropriate bushing or set screw to manufacturer specifications. After installation, verify belt tension and sheave alignment before returning the system to service.