Browning 1025840 Single Groove Sheave 2in Od Cast Iron

Product Description

The BROWNING 1025840 is a finished bore single groove sheave designed for use with standard V-belts in light-duty drive applications. Constructed from cast iron, this sheave features a 2-inch outer diameter and a 5/8-inch finished bore, ready to mount without additional machining. The groove width measures 21/32 inches, and the overall bore length is 15/16 inches. The sheave weighs 0.4 pounds, making it suited for compact drive assemblies where space and weight constraints matter. Licensed HVAC technicians, millwrights, and mechanical contractors install this type of sheave in blower and fan drive systems across residential and light commercial equipment.

This sheave is commonly used in belt-driven blower assemblies, fan drives, and small power transmission applications. It accepts 3L, 4L, and A-series V-belts, with a pitch diameter of 1.8 inches for 4L and A-type belts and a pitch diameter of 1.46 inches for 3L-type belts. Its compact 2-inch OD makes it appropriate for tight drive configurations found in air handlers, unit ventilators, and similar equipment where a small-diameter, single-groove pulley is required.

Key Features

• Finished bore at 5/8 inches — no additional machining required for standard shaft fitment
• Cast iron construction for durability in continuous belt-drive service
• Compatible with 3L, 4L, and A-series V-belts
• Pitch diameter of 1.8 inches for 4L and A-type belts; 1.46 inches for 3L belts
• Lightweight at 0.4 pounds, suitable for compact drive assemblies
• Single groove design simplifies drive configuration and belt replacement

Compatibility

Designed as an OEM-style replacement single groove sheave for V-belt drive systems using 3L, 4L, or A-series belts with a 5/8-inch shaft bore.

Installation Notes

Installation is typically performed by a licensed HVAC technician or qualified mechanical contractor. Disconnect and lock out all power to the equipment before removing or installing sheaves. Ensure the shaft is clean and free of burrs before seating the bore, and verify sheave alignment with a straightedge before tensioning the belt. Follow applicable ANSI and OSHA guarding requirements for belt-drive assemblies.