Browning 1033372 Two Groove Sheave 1-3/8 Bore Cast Iron

Product Description

The BROWNING 1033372 is a finished bore, two groove V-belt sheave constructed from cast iron, designed for use in belt-driven mechanical systems found in HVAC equipment, industrial fans, blowers, and pump drives. The sheave features a 1-3/8 inch finished bore diameter and a 3-3/4 inch outside diameter, with a belt pitch diameter of 3.4 inches for B-section or A-section belts and a pitch diameter of 3.0 inches for 4L or A-type belts. The through-bore length is 1-31/32 inches. This component is installed by HVAC technicians, millwrights, and mechanical contractors in both residential and light commercial applications where reliable belt-drive power transmission is required.

This sheave is suited for belt-driven blower assemblies, air handler fan drives, and general-purpose power transmission setups. It accommodates two V-belt grooves, allowing for multi-belt drive configurations that distribute load and improve system reliability in higher-torque or redundancy-critical applications. The finished bore design means the bore is machined to final size and is ready for direct shaft installation without additional machining, making it a practical replacement or new-installation component for standard fractional and integral horsepower drive systems.

Key Features

• Finished bore eliminates machining — ready for direct shaft mounting at 1-3/8 inch bore diameter
• Two groove design supports dual V-belt configurations for improved load distribution
• Cast iron construction provides durability and resistance to wear in continuous-duty drive applications
• Compatible with B-section, A-section, and 4L-type V-belts
• 3-3/4 inch outside diameter with 3.4 inch pitch diameter for B or A belts
• Through-bore length of 1-31/32 inches accommodates standard shaft arrangements

Compatibility

Designed as an OEM-style replacement or direct-install sheave for belt-driven HVAC blower assemblies, fan drives, and general power transmission systems using B-section, A-section, or 4L V-belts on shafts with a 1-3/8 inch diameter.

Installation Notes

Installation should be performed by a qualified HVAC technician or mechanical contractor. Disconnect and lock out all power to the drive system before removing or installing any sheave or belt component. Verify shaft diameter and keyway dimensions before mounting, and confirm belt type and groove profile match prior to tensioning. Follow applicable industry standards for belt tension and sheave alignment to prevent premature belt or bearing wear.