Browning 1028471 Single Groove Sheave 4.95 in Od Cast Iron

Product Description

The BROWNING 1028471 is a finished bore single groove sheave designed for use with B-section and A-section or 4L V-belts in belt-drive power transmission systems. Cast from iron for durability and dimensional stability, this sheave features a 7/8 inch finished bore and a 4.95 inch outer diameter. The pitch diameter for B-section belts is 4.6 inches, and the pitch diameter for A-section or 4L belts is 4.2 inches. It weighs 2.1 pounds and is a direct drop-in component for single-groove drive configurations. HVAC technicians, millwrights, and mechanical contractors commonly install this type of sheave in blower and fan drive assemblies.

This sheave is suited for residential and light commercial belt-drive applications including air handling units, furnace blowers, exhaust fans, and other single-groove drive systems where B or A-section belts are used. The finished bore and standard groove profile allow for straightforward installation on standard motor or driven-shaft diameters of 7/8 inch without secondary machining. The through-bore length of 1-5/32 inches accommodates standard set screw or bushing retention in typical drive assemblies.

Key Features

• Cast iron construction for rigidity and long service life in continuous-duty drive applications
• Finished bore of 7/8 inch — no secondary machining required
• Single groove profile accepts B-section and A-section or 4L V-belts
• 4.95 inch outer diameter with 4.6 inch B-belt pitch diameter and 4.2 inch A/4L pitch diameter
• Through-bore length of 1-5/32 inches accommodates standard set screw retention
• Lightweight at 2.1 pounds for easy single-technician handling during installation

Compatibility

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

Installation Notes

Installation is typically performed by HVAC technicians, millwrights, or mechanical contractors. Always de-energize and lock out the equipment before removing or installing any sheave or belt drive component. Verify shaft diameter and belt section before mounting, and ensure the set screw is properly tightened and the sheave is aligned with the mating sheave before restarting the drive. Belt tension should be set per the belt manufacturer specifications for the applicable belt section.