Browning 1027663 Single Groove Sheave 1 in Bore Cast Iron

Product Description

The BROWNING 1027663 is a finished bore single groove sheave designed for V-belt drive systems in HVAC, industrial, and mechanical power transmission applications. Built from cast iron, this sheave features a 1 inch bore diameter and a 14-1/4 inch outer diameter, making it suited for larger fan and blower drive assemblies. The groove width measures 3/4 inch. With a pitch diameter of 14.0 inches for 4L or A-type belts and 13.66 inches for 3L-type belts, the 1027663 delivers consistent belt engagement and reliable torque transfer. Licensed HVAC technicians, millwrights, and mechanical contractors are the typical installers for this component.

This sheave is used in belt-driven blower and fan systems found in commercial and residential HVAC equipment, as well as general industrial power transmission setups. The finished bore means the hub is machined to final dimension at the factory, reducing installation time in the field. The 14-1/4 inch OD and single groove configuration make it a common choice for direct replacement in large-diameter drive arrangements where a single V-belt is specified. The overall length through the bore measures 1-15/32 inches.

Key Features

• Finished bore at 1 inch — no additional machining required at installation
• Cast iron construction for durability and dimensional stability under load
• Single groove design accepts standard 3L, 4L, and A-type V-belts
• Pitch diameter of 14.0 inches for 4L or A-type belts; 13.66 inches for 3L-type belts
• 14-1/4 inch outer diameter suits large fan and blower drive applications
• Factory-finished bore reduces field prep time and ensures precise fit

Compatibility

Designed as an OEM-style replacement single groove sheave for belt-driven fan and blower assemblies using 3L, 4L, or A-type V-belts with a 1 inch shaft bore.

Installation Notes

Installation should be performed by a qualified HVAC technician or millwright. Always de-energize and lock out the drive system before removing or installing sheaves. Verify shaft diameter matches the 1 inch finished bore before mounting, and ensure proper belt tension and sheave alignment after installation to prevent premature belt or bearing wear. Consult applicable mechanical and electrical codes for lockout/tagout procedures.