Browning 1026533 Single Groove Sheave 5/8 Bore 4.45 Od

Product Description

The BROWNING 1026533 is a finished bore single groove sheave designed for V-belt drive systems in HVAC, industrial, and mechanical power transmission applications. This cast iron pulley features a 5/8 inch finished bore and a 4.45 inch outer diameter, making it a direct-fit component for standard A-section and B-section belt configurations. At 1.7 pounds, it delivers the mass and rigidity needed for reliable torque transfer in blower and fan drive setups. Licensed HVAC technicians and mechanical contractors typically install this sheave during motor or blower shaft replacement or drive system reconfiguration.

This sheave is suited for residential and light commercial HVAC blower assemblies, exhaust fans, and general power transmission equipment where a single groove V-belt drive is specified. The 4.45 inch OD accommodates belt pitch diameters of 4.2 inches for 4L or A-type belts and 3.86 inches for 3L-type belts, allowing flexibility across common belt cross-sections used in air-handling equipment. The 3/4 inch groove width and finished bore allow direct installation onto a 5/8 inch shaft without further machining.

Key Features

• Finished bore: 5/8 inch — ready for direct shaft installation with no additional machining
• Cast iron construction for rigidity and long service life in belt drive applications
• Single groove design accepts A-section, B-section, 3L, and 4L V-belts
• 4.45 inch OD with a belt pitch diameter of 4.2 inches for 4L or A-type belts
• 3L belt pitch diameter of 3.86 inches for compatibility with lighter duty belt profiles
• Overall bore length of 1-5/32 inches provides secure shaft engagement

Compatibility

Designed as an OEM-style replacement single groove sheave for V-belt drive systems using 3L, 4L, or A-section belts on 5/8 inch shafts.

Installation Notes

Installation should be performed by a qualified HVAC technician or millwright. Disconnect and lock out all electrical power to the unit before removing the existing sheave or belt. Verify shaft diameter and keyway dimensions before mounting. Proper belt tension and sheave alignment are critical to belt life and bearing load — use a straightedge or laser alignment tool across both sheave faces after installation.