Browning 1025980 Single Groove Sheave 2.5 in Od Cast Iron

Product Description

The BROWNING 1025980 is a finished bore single groove sheave designed for V-belt drive systems in light-duty mechanical and HVAC applications. Cast from iron for durability and dimensional stability, this sheave features a 2.5 inch outer diameter and a 0.5 inch finished bore, making it ready to mount without additional machining. The groove is sized to accept 3L, 4L, and A-series V-belts. With an overall bore length of 0.9375 inches and a groove width of 0.65625 inches, this sheave suits compact drive assemblies where space and weight are considerations. It weighs 0.6 pounds. Licensed HVAC techs, millwrights, and mechanical contractors commonly source this component for blower and fan drive replacements.

This sheave is appropriate for residential and light commercial applications including air handler blower assemblies, small fan drives, and general-purpose belt drive systems. It accepts 3L-series belts with a pitch diameter of 1.96 inches and 4L or A-series belts with a pitch diameter of 2.3 inches. The finished bore allows direct shaft installation where a 0.5 inch shaft diameter is present. Typical uses include replacement of worn or damaged sheaves on belt-driven blower wheels in forced-air systems.

Key Features

• Finished bore — no additional machining required for 0.5 inch shaft installations
• Cast iron construction for dimensional stability and wear resistance
• Single groove design accepts 3L, 4L, and A-series V-belts
• 2.5 inch outer diameter suits compact blower and fan drive assemblies
• Belt pitch diameter of 2.3 inches for 4L or A-series; 1.96 inches for 3L-series
• Lightweight at 0.6 pounds for easy handling during service calls

Compatibility

Designed as an OEM-style replacement single groove sheave for belt-driven blower and fan assemblies using 3L, 4L, or A-series V-belts with a 0.5 inch bore shaft requirement.

Installation Notes

Installation should be performed by a qualified HVAC technician or millwright. Disconnect and lock out all power to the unit before removing or installing any drive components. Ensure the shaft diameter matches the 0.5 inch finished bore before installation, and verify belt alignment and tension after mounting to prevent premature wear. A set screw or key may be required to secure the sheave to the shaft — confirm the hub configuration before installation.