Browning 1026657 Single Groove Sheave 5/8 in Bore 4.95 in Od

Product Description

The BROWNING 1026657 is a finished bore single groove sheave designed for V-belt drive systems in HVAC, industrial, and mechanical power transmission applications. Manufactured from cast iron, this sheave features a 5/8 inch bore diameter and a 4.95 inch outer diameter with a 3/4 inch face width. The single groove profile is compatible with standard A-section and 4L-section V-belts, as well as 3L-section belts. Licensed HVAC technicians and millwrights typically install this component on blower assemblies, fan drives, and belt-driven mechanical equipment where a fixed-bore sheave is required.

This sheave is suited for residential and light commercial HVAC blower sections, exhaust fans, and general-purpose belt drive systems. The finished bore comes ready for installation on a 5/8 inch shaft without additional machining. With a belt pitch diameter of 5.1 inches for B-section belts and 4.7 inches for A-section and 4L-section belts, it provides accurate belt engagement and consistent drive ratios. A pitch diameter of 4.36 inches applies when used with 3L-section belts.

Key Features

• Finished bore design — 5/8 inch bore diameter, ready for direct shaft installation
• Cast iron construction for durability in belt-drive service environments
• Single groove profile accepts standard A, 4L, and 3L V-belt sections
• 4.95 inch outer diameter with 3/4 inch face width
• Belt pitch diameter of 4.7 inches for A-section and 4L-section belts
• Overall bore length of 1-5/32 inches through the hub

Compatibility

Designed as an OEM-style replacement single groove sheave for V-belt drive systems using A-section, 4L-section, or 3L-section belts on 5/8 inch shafts in residential and commercial mechanical applications.

Installation Notes

Installation is typically performed by a licensed HVAC technician or millwright. Always disconnect and lock out electrical power to the motor before removing or installing a sheave. Ensure the shaft is clean and free of burrs before seating the sheave, and verify proper belt tension and alignment after installation to prevent premature belt and bearing wear. Follow applicable ANSI and local mechanical codes for belt drive service.