Browning 1026400 Single Groove Sheave 1/2 in Bore Cast Iron

Product Description

The BROWNING 1026400 is a finished bore single groove sheave designed for belt-drive applications in HVAC, industrial, and commercial mechanical systems. Cast from iron for durability and dimensional stability, this sheave features a 1/2 inch finished bore and a 3.95 inch outside diameter. The belt pitch diameter measures 4.1 inches for B-section belts, 3.7 inches for 4L or A-section belts, and 3.36 inches for 3L-section belts. At 3/4 inch wide with an overall bore length of 1-5/32 inches, it is sized for compact single-groove drive configurations. HVAC technicians and mechanical contractors install this sheave on blower assemblies, fan drives, and similar rotating equipment where precise belt alignment and pulley ratio matter.

This sheave is suited for single-groove belt drive setups in residential and light commercial HVAC air handlers, rooftop units, and ventilation fans. It is also used in general industrial drive applications requiring a B, A, 4L, or 3L belt profile. The finished bore accepts a 1/2 inch shaft directly without additional machining. Its cast iron construction handles the continuous rotational loads typical of blower and fan drive service.

Key Features

• Finished 1/2 inch bore — ready to install on standard 1/2 inch shafts without machining
• Compatible with B, A, 4L, and 3L belt sections for flexible drive configuration
• Cast iron construction provides durability and resistance to wear under continuous operation
• Single groove design for straightforward single-belt drive setups
• 3/4 inch face width suits compact drive assemblies
• Overall bore length of 1-5/32 inches provides adequate shaft engagement

Compatibility

Designed as an OEM-style replacement or upgrade sheave for single-groove belt drive systems using B, A, 4L, or 3L cross-section belts with a 1/2 inch shaft diameter.

Installation Notes

A licensed HVAC technician or qualified mechanical technician should install this sheave. Disconnect and lock out all power to the drive system before removing the existing sheave or belt. Ensure the shaft is clean and free of burrs before seating the bore, and verify pulley alignment with a straightedge or laser alignment tool after installation to prevent premature belt wear. Follow applicable ANSI and OSHA guarding requirements for exposed belt drives.