Browning 1027838 Single Groove Sheave 2-1/2 in Od

Product Description

The BROWNING 1027838 is a finished bore single groove sheave designed for use with standard A-section and 4L V-belts in light-duty drive applications. Cast from iron for rigidity and wear resistance, this sheave features a 2.5-inch outer diameter, a 0.625-inch finished bore, and a groove width of 0.8125 inches. The 1.9-inch pitch diameter accommodates belt type 4L or A, making it a common choice for small blower, fan, and motor drive assemblies. Installation requires no additional boring or bushing — the bore is finished to size and ready to mount directly to a shaft.

This sheave is suited for residential and light commercial HVAC fan and blower drive systems, as well as general industrial equipment where a compact, single-groove V-belt drive is required. Typical applications include belt-driven blower assemblies on air handlers, unit heaters, and exhaust fans. The compact 2.5-inch OD and 1-1/16-inch overall bore length make it appropriate for tight drive arrangements where clearance is limited. A licensed HVAC technician or millwright typically handles sheave replacement during belt drive maintenance or motor swap-outs.

Key Features

• Finished bore at 0.625 inches — no additional machining required
• Single groove profile compatible with 4L and A-section V-belts
• 2.5-inch outer diameter with 1.9-inch pitch diameter for accurate belt alignment
• Cast iron construction for durability in continuous-duty drive service
• Overall bore length of 1.0625 inches suits standard short-shaft mounting
• Groove width of 0.8125 inches matches standard A and 4L belt cross-sections

Compatibility

Designed as an OEM-style replacement or direct-fit sheave for single-groove V-belt drive assemblies using 4L or A-section belts with a 0.625-inch shaft bore requirement.

Installation Notes

Sheave installation and replacement should be performed by a qualified HVAC technician or millwright. Disconnect and lock out all electrical power to the motor before beginning work. Verify shaft diameter matches the 0.625-inch finished bore before pressing or sliding the sheave onto the shaft, and secure with the appropriate setscrew or key as required by the drive design. Check belt tension and sheave alignment per the belt manufacturer's guidelines after installation to avoid premature belt and bearing wear.