Browning 1026723 Single Groove Sheave 0.875in Bore 5.25in Od

Product Description

The BROWNING 1026723 is a finished bore single groove sheave designed for use in V-belt drive systems across HVAC, industrial, and mechanical power transmission applications. Cast from iron, this sheave features a 0.875-inch finished bore and a 5.25-inch outside diameter. The B-section belt pitch diameter measures 5.4 inches, and the groove accommodates 4L/A-type belts at a 5.0-inch pitch diameter and 3L-type belts at a 4.66-inch pitch diameter. The through-bore length is 1-5/32 inches. At 2.05 pounds, it is compact and suited for motor-to-blower or motor-to-fan drive arrangements commonly found in residential and light commercial HVAC equipment and general machinery.

This sheave is used in single-groove V-belt drive setups where a fixed, finished bore is required for direct shaft mounting. Typical applications include blower drives, fan drives, and auxiliary equipment drives in HVAC air handlers, rooftop units, and light industrial machinery. The finished bore accepts a 0.875-inch shaft without additional machining, making it a straightforward drop-in replacement or new-installation component for technicians working with standard B-section or 4L/A belt configurations.

Key Features

• Finished bore eliminates additional machining — ready for direct 0.875-inch shaft installation
• Single groove design compatible with 3L, 4L, and A-section V-belts
• Cast iron construction for durability in continuous-duty drive applications
• 5.25-inch OD with 5.4-inch B-section pitch diameter for accurate belt ratio calculations
• Through-bore length of 1-5/32 inches provides solid shaft engagement
• Lightweight at 2.05 pounds for easy handling and installation

Compatibility

Designed as an OEM-style replacement or new-installation sheave for single-groove V-belt drives using 3L, 4L, or A-section belts on 0.875-inch shafts in HVAC, fan, blower, and general power transmission applications.

Installation Notes

Installation should be performed by a qualified HVAC technician or millwright. Disconnect and lock out all power to the drive system before removing or installing any sheave or belt. Verify shaft diameter and keyway dimensions before mounting, and secure the sheave with the appropriate set screw or bushing hardware per the drive manufacturer's requirements. Check belt tension and sheave alignment with a straightedge or laser alignment tool after installation to prevent premature belt and bearing wear.