Browning 1026020 Single Groove Sheave 0.75 in Bore Cast Iron

Product Description

The BROWNING 1026020 is a finished bore single groove sheave designed for V-belt drive systems in HVAC, industrial, and mechanical power transmission applications. Machined from cast iron, this sheave features a 0.75-inch finished bore and a 2.5-inch outer diameter. The groove is 0.656 inches wide, sized to accept standard 3L, 4L, or A-section V-belts. With a belt pitch diameter of 2.3 inches for 4L and A-type belts and 1.96 inches for 3L belts, it delivers accurate speed ratio performance in blower and fan drive assemblies. The finished bore requires no additional machining before installation.

This sheave is suited for use in residential and light commercial HVAC blower assemblies, exhaust fans, and general-purpose belt drive systems. It is a direct-mount component where a compact, single-groove pulley is required at the motor or driven shaft. The 0.75-inch bore fits standard fractional horsepower motor shaft sizes common in air handling units and ventilation equipment. Licensed HVAC technicians and millwrights typically install this component during motor replacements, drive upgrades, or scheduled belt drive maintenance.

Key Features

• Finished bore at 0.75 inches — no machining required prior to installation
• Single groove design accepts 3L, 4L, and A-section V-belts
• Cast iron construction for durability in continuous-duty drive applications
• 2.5-inch outer diameter with 2.3-inch pitch diameter for 4L and A-type belts
• 1.96-inch pitch diameter for 3L belt type
• Groove width of 0.656 inches for proper belt seating and alignment

Compatibility

Designed as an OEM-style replacement or upgrade sheave for fractional horsepower belt drive systems using 3L, 4L, or A-section V-belts with a 0.75-inch shaft.

Installation Notes

Installation is typically performed by an HVAC technician or millwright. Disconnect and lock out power to the motor before removing or installing any drive components. Ensure the sheave is aligned with the mating pulley using a straightedge or laser alignment tool before tensioning the belt. Verify set screw engagement on the keyway or shaft flat and confirm belt tension per the belt manufacturer guidelines before returning the system to service.