Browning 1033273 Two Groove Sheave 1-1/8 in Bore Cast Iron

Product Description

The BROWNING 1033273 is a finished bore two groove sheave designed for V-belt drive systems in commercial and industrial HVAC, mechanical, and equipment applications. Cast iron construction gives this sheave the rigidity and wear resistance required for continuous-duty belt drive operation. The bore measures 1-1/8 inches and the overall outside diameter is 3.35 inches, with a belt pitch diameter of 3.0 inches for B-section or A-section belts and a 4L or A pitch diameter of 2.6 inches. The overall length through bore is 1-31/32 inches. This sheave is supplied as a finished bore unit, meaning no additional boring or machining is required before installation.

This sheave is suited for use in belt-driven fan assemblies, blower drives, pump drives, and similar rotating equipment commonly found in commercial HVAC air handlers, industrial ventilation systems, and mechanical room installations. Two-groove sheaves allow dual-belt configurations that distribute load and provide redundancy in demanding drive applications. Licensed mechanics and HVAC service technicians typically install or replace this style of sheave during routine drive maintenance or equipment upgrades.

Key Features

• Finished bore at 1-1/8 inches — no additional machining required
• Two groove design accommodates dual V-belt drive configurations
• Cast iron construction for rigidity and long service life
• Belt pitch diameter of 3.0 inches for B or A section belts
• 4L or A belt type pitch diameter of 2.6 inches
• Overall length through bore of 1-31/32 inches

Compatibility

Designed as an OEM-style replacement or direct-fit sheave for dual V-belt drive systems using B-section or A-section belts, as well as 4L-profile belts, in residential and commercial mechanical equipment.

Installation Notes

Installation should be performed by a qualified mechanic or HVAC technician. Disconnect and lock out all power to the drive system before removing the existing sheave. Ensure shaft diameter matches the 1-1/8 inch finished bore before mounting, and verify belt alignment and tension after installation using a straightedge or laser alignment tool. Follow applicable ANSI and OSHA standards for belt drive guarding after service is complete.