Browning 1026319 Single Groove Sheave 3.45in Od 3/4in Bore

Product Description

The BROWNING 1026319 is a finished bore single groove sheave designed for V-belt drive systems in HVAC, industrial, and mechanical power transmission applications. Cast iron construction provides durability and dimensional stability under continuous load. The sheave features a 3.45 inch outer diameter, a 3/4 inch finished bore, and a groove width of 21/32 inches. It is compatible with 4L or A-type belts at a 3.2 inch pitch diameter and 3L-type belts at a 2.86 inch pitch diameter. Licensed HVAC technicians, mechanical contractors, and industrial maintenance professionals are the typical installers of this component.

This sheave is used in belt-driven blower and fan assemblies found in residential and light commercial HVAC systems, as well as general-purpose industrial drive applications. It is suited for installations where a single groove, small-diameter sheave is required on a 3/4 inch shaft. The finished bore eliminates additional machining at installation. The overall length through the bore measures 15/16 inches, making it appropriate for compact drive arrangements with limited shaft engagement depth.

Key Features

• Finished bore at 3/4 inches — ready to install without additional machining
• 3.45 inch outer diameter with a single V-belt groove
• Cast iron construction for rigidity and wear resistance under belt tension
• Compatible with 4L or A-type belts at 3.2 inch pitch diameter
• Compatible with 3L-type belts at 2.86 inch pitch diameter
• Groove width of 21/32 inches suits standard V-belt profiles

Compatibility

Designed as an OEM-style replacement or direct-fit sheave for belt-driven fan and blower assemblies using 3L, 4L, or A-type V-belts on 3/4 inch diameter shafts.

Installation Notes

Installation is typically performed by licensed HVAC technicians or mechanical maintenance professionals. Disconnect and lock out all power to the drive system before removing or installing any sheave or belt components. Ensure the shaft is clean and free of burrs before seating the finished bore. Align the sheave with the mating pulley using a straightedge or laser alignment tool before tensioning the belt to the manufacturer's specification for the belt type in use.