Browning 1028026 Single Groove Sheave 3.15in Od 7/8in Bore

Product Description

The BROWNING 1028026 is a finished bore single groove sheave designed for use with B-section or 4L-section V-belts in belt-drive power transmission systems. Constructed from cast iron, this sheave features a 3.15-inch outer diameter, a 7/8-inch finished bore, and a groove width of 13/16 inches. The pitch diameter measures 2.8 inches for B-type belts and 2.4 inches for 4L or A-type belts. Licensed HVAC technicians, millwrights, and mechanical contractors install these components when servicing or replacing blower and fan drive assemblies in light commercial and residential equipment.

This sheave is suited for single-groove V-belt drive applications including HVAC blower assemblies, exhaust fans, and general-purpose equipment requiring a compact, finished bore pulley. The finished bore accepts a 7/8-inch shaft directly without additional machining, making it a straightforward drop-in for belt drive setups where OD, bore, and belt section are confirmed to match. The overall length through the bore is 1-1/16 inches, keeping the assembly profile compact in tight equipment bays.

Key Features

• Finished bore at 7/8 inches — no additional machining required for 7/8-inch shafts
• Cast iron construction for durability in industrial and commercial drive applications
• Single groove design compatible with B-section and 4L or A-section V-belts
• 3.15-inch outer diameter with 2.8-inch B-belt pitch diameter and 2.4-inch 4L or A-belt pitch diameter
• Groove width of 13/16 inches provides proper belt seating and alignment
• Lightweight at 0.8 pounds, minimizing added load on shaft bearings

Compatibility

Designed as an OEM-style replacement sheave for single-groove V-belt drive systems using B-section or 4L or A-section belts on 7/8-inch shafts.

Installation Notes

Installation is performed by licensed HVAC technicians, millwrights, or qualified mechanical service personnel. Disconnect and lock out all power to the equipment before removing or installing any sheave or belt. Confirm shaft diameter, belt section, and required pitch diameter before mounting. Align the sheave carefully with the mating sheave and check belt tension per the belt manufacturer's specification after installation.