Browning 1026343 Single Groove Sheave 0.5 in Bore Cast Iron

Product Description

The BROWNING 1026343 is a finished bore single groove sheave designed for use in V-belt drive systems in HVAC, industrial, and mechanical equipment applications. Cast from iron for durability, this sheave features a 0.5 inch bore diameter and a 3.75 inch outer diameter. The pitch diameter is 3.5 inches for 4L or A belt types, making it straightforward to match with standard fractional V-belts. The overall length through bore is 1-5/32 inches and the sheave is 0.75 inches wide. Licensed HVAC technicians, millwrights, and mechanical contractors install this type of component during blower motor and fan drive setups.

This single groove sheave is suited for residential and light commercial HVAC blower assemblies, exhaust fans, and general-purpose belt drive equipment where a single V-belt drive is required. The finished bore is machined to 0.5 inches, ready for direct shaft mounting without additional boring. It is compatible with standard 4L and A-type V-belts as well as 3L-type belts with a 3.16 inch pitch diameter. Installers working on fan coil units, air handlers, and similar equipment will find this sheave sized appropriately for fractional horsepower motor shafts.

Key Features

• Finished 0.5 inch bore — no additional machining required for direct shaft installation
• Cast iron construction provides strength and wear resistance in belt drive applications
• 3.75 inch outer diameter with 3.5 inch pitch diameter for 4L and A-type V-belts
• Also compatible with 3L-type belts at a 3.16 inch pitch diameter
• Single groove design for straightforward single V-belt drive configurations
• Compact 0.75 inch face width suits space-constrained motor and blower assemblies

Compatibility

Designed as an OEM-style replacement or new-installation sheave for single V-belt drive systems using 4L, A, or 3L type belts with a 0.5 inch shaft bore requirement.

Installation Notes

Installation should be performed by a qualified mechanic or HVAC technician. Disconnect and lock out all power to the equipment before removing or installing any belt drive components. Verify shaft diameter matches the 0.5 inch finished bore before mounting, and ensure proper belt tension and sheave alignment after installation to prevent premature belt or bearing wear. Follow applicable OSHA and equipment manufacturer guidelines for guarding belt drive assemblies after service.