Browning 1026392 Single Groove Sheave 1 in Bore Cast Iron

Product Description

The BROWNING 1026392 is a single groove V-belt sheave designed for power transmission applications in HVAC, industrial, and mechanical drive systems. Cast from iron for durability, this finished bore sheave accepts a 1 inch bore shaft and measures 3-3/4 inches in outer diameter. The groove is machined to accommodate standard B-section or A-section V-belts with a belt pitch diameter of 3.9 inches. Overall length through the bore is 1-5/32 inches. Licensed HVAC technicians, millwrights, and mechanical contractors install this type of sheave when replacing or configuring belt-driven fan and blower assemblies.

This sheave fits belt-driven blower and fan setups common in residential and light commercial HVAC units, as well as general-purpose industrial drive systems. It is suited for applications using 4L or A-section belts with a pitch diameter of 3.5 inches or 3L-section belts with a pitch diameter of 3.16 inches. The finished bore is ready for direct shaft installation without additional machining, making it a practical drop-in replacement for worn or damaged sheaves in existing drive configurations.

Key Features

• Single groove design for straightforward single-belt drive configurations
• Finished 1 inch bore — no additional machining required for standard shaft fitment
• Cast iron construction provides resistance to wear and deformation under load
• Compatible with 4L, A-section, and 3L V-belt profiles
• 3-3/4 inch OD with 3.9 inch belt pitch diameter suits common blower and fan drive ratios
• Groove width of 3/4 inch matches standard V-belt cross-sections

Compatibility

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

Installation Notes

Installation should be performed by a qualified HVAC technician or millwright. Disconnect and lock out all power to the unit before removing the existing sheave or belt. Verify shaft diameter and keyway dimensions before mounting to ensure proper fit. After seating the sheave and installing the belt, check belt tension and sheave alignment with a straightedge or laser alignment tool before returning the system to service.