Browning 1027994 Single Groove Sheave 3.15in Od Cast Iron

Product Description

The BROWNING 1027994 is a finished bore single groove sheave designed for V-belt drive systems in HVAC, industrial, and mechanical power transmission applications. It features a 3.15 inch outer diameter, a 0.5 inch finished bore, and is constructed from cast iron for durable, long-service performance. The groove accepts A-section or 4L-type V-belts with a pitch diameter of 2.4 inches and a B-diameter of 2.8 inches. The bore length through the hub measures 1-1/16 inches. This sheave is installed by HVAC technicians, millwrights, and mechanical contractors on belt-driven fans, blowers, and motor drive assemblies.

This sheave is suited for residential and light commercial HVAC systems as well as general industrial belt drive applications. It is commonly mounted on motor or blower shafts in forced-air air handlers, rooftop units, and exhaust fan assemblies where a single-groove A or 4L V-belt configuration is specified. The finished bore allows direct shaft mounting without additional machining when the shaft diameter matches the 0.5 inch bore size.

Key Features

• Finished 0.5 inch bore — ready for direct shaft installation with no additional machining required
• Single groove profile accepts A-section and 4L V-belts
• Cast iron construction provides strength and resistance to wear under continuous belt load
• 2.4 inch pitch diameter for A/4L belt type, 2.8 inch B-diameter
• Groove width of 13/16 inch suits standard A-section belt widths
• Compact 3.15 inch OD fits space-constrained drive configurations

Compatibility

Designed as an OEM-style replacement single groove sheave for belt-driven HVAC blowers, fans, and general industrial drive systems using A-section or 4L V-belts with a 0.5 inch shaft bore.

Installation Notes

Installation should be performed by a qualified HVAC technician or millwright. Disconnect and lock out all electrical power to the drive system before removing or installing any sheave. Verify shaft diameter matches the 0.5 inch finished bore before installation, and ensure the sheave is properly aligned with the mating pulley to prevent premature belt wear. Tighten the set screw or bushing fasteners to the fastener manufacturer's specifications using appropriate hand tools.