Browning 1033323 Two Groove Sheave 1.125 Inch Bore Cast Iron

Product Description

The BROWNING 1033323 is a two-groove, finished-bore sheave used in belt-drive systems common to HVAC equipment, industrial fans, and blower assemblies. Cast iron construction provides rigidity and dimensional stability under continuous load. The finished bore measures 1-1/8 inches in diameter, and the outer diameter is 3.55 inches. The belt pitch diameter for B-section or A-section belts is 2.8 inches, with an overall through-bore length of 1-31/32 inches. Licensed HVAC and mechanical technicians install this component when replacing or re-sheaving drive trains on air handlers, belt-drive fans, and similar rotating equipment.

This sheave is suited for residential and light commercial belt-drive applications where standard 4L or A-section V-belts are used. The two-groove configuration allows for dual-belt drive arrangements, which are common on heavier fan loads or where redundancy is required. The finished bore is ready to mount directly to a shaft of 1-1/8 inches without additional machining.

Key Features

• Two-groove design accommodates dual 4L or A-section V-belts
• Finished bore at 1-1/8 inches — no machining required
• Cast iron construction for durability and dimensional stability
• Belt pitch diameter of 2.8 inches for accurate drive ratio calculations
• Outer diameter of 3.55 inches suitable for compact drive arrangements
• Through-bore length of 1-31/32 inches for positive shaft engagement

Compatibility

Designed as an OEM-style replacement sheave for belt-drive blower and fan assemblies using 4L or A-section V-belts with a 1-1/8 inch shaft bore requirement.

Installation Notes

A licensed mechanical or HVAC technician should install this sheave. Disconnect and lock out all electrical power before accessing the drive assembly. Align the sheave parallel to mating drive components using a straightedge before tightening the shaft fasteners. Verify belt tension and sheave alignment after installation to prevent premature belt and bearing wear.