Browning 1026673 Single Groove Sheave 0.875 Bore 4.95 Od

Product Description

The BROWNING 1026673 is a finished bore single groove sheave designed for use in belt-drive power transmission systems. Cast from iron, it accepts a 7/8-inch (0.875 inches) bore shaft and measures 4.95 inches in outer diameter with a groove width of 0.75 inches. The belt pitch diameter is 5.1 inches, with compatibility for Type A or 4L belts at a 4.7-inch pitch diameter and Type 3L belts at a 4.36-inch pitch diameter. The overall length through bore is approximately 1-5/32 inches. This sheave is installed by HVAC technicians, industrial mechanics, and maintenance professionals working on fan, blower, and motor drive assemblies.

This single groove sheave is suited for residential and light commercial HVAC blower assemblies, exhaust fans, and general-purpose motor-to-shaft belt drive applications. The finished bore means the shaft opening is already machined to final dimension, eliminating the need for additional boring. It is a direct-mount component that pairs with a standard V-belt to transfer rotational power between a motor shaft and a driven component such as a blower wheel or fan.

Key Features

• Finished bore at 0.875 inches — ready to install without additional machining
• 4.95-inch outer diameter with a 5.1-inch belt pitch diameter
• Compatible with Type A, 4L, and 3L V-belts
• Single groove design for straightforward single-belt drive configurations
• Cast iron construction for durability in continuous-duty drive applications
• Compact 0.75-inch groove width suits space-constrained drive assemblies

Compatibility

Designed as an OEM-style replacement single groove sheave for belt-drive systems requiring a 0.875-inch finished bore and a 4.95-inch OD pulley accepting Type A, 4L, or 3L V-belts.

Installation Notes

Installation is typically performed by a qualified HVAC technician or industrial mechanic. De-energize and lock out the motor at the disconnect before removing or installing any sheave or belt. Verify shaft diameter matches the 0.875-inch finished bore before mounting, and confirm belt type and pitch diameter match the drive system specifications. A properly tensioned belt reduces bearing wear and prolongs sheave life — refer to belt manufacturer tension guidelines for the belt type in use.