Browning 1026418 Single Groove Sheave 3.95in Od 5/8in Bore

Product Description

The BROWNING 1026418 is a single groove, finished bore sheave designed for V-belt drive systems commonly found in HVAC equipment, industrial fans, and blower assemblies. Cast from iron for durability under continuous load, this sheave features a 3.95 inch outer diameter and a 5/8 inch finished bore ready for direct shaft installation. The groove width is 3/4 inch. With a belt pitch diameter of 4.1 inches for Type B or A belts, and 3.36 inches for Type 3L belts, the 1026418 is suited for applications where precise drive ratios and belt alignment are critical to system performance.

This sheave is typically installed on motor or driven-shaft assemblies in residential and light commercial HVAC systems, including air handlers, furnace blowers, and ventilation fans. It is also used in general industrial V-belt drive configurations where a compact single groove iron sheave is required. The finished bore eliminates additional machining, allowing direct mounting onto a standard 5/8 inch shaft.

Key Features

• Finished 5/8 inch bore — no additional machining required for standard shaft fitment
• 3.95 inch outer diameter with 4.1 inch belt pitch diameter for Type B and A belts
• Compatible with Type 3L belts at 3.36 inch pitch diameter
• 3/4 inch groove width for proper belt seating and alignment
• Cast iron construction for durability and resistance to wear under continuous belt load
• Overall length through bore of 1-5/32 inches

Compatibility

Designed as an OEM-style replacement single groove sheave for V-belt drive assemblies using Type B, A, or 3L belts on 5/8 inch shafts.

Installation Notes

Installation should be performed by a qualified HVAC technician or mechanical tradesperson. Shut down and lock out the equipment per LOTO procedures before removing the existing sheave or belt. Ensure the shaft diameter matches the 5/8 inch finished bore before installation, and verify belt alignment with a straightedge across both sheave faces after mounting. Proper belt tension should be set per the belt manufacturer specifications before returning the system to service.