Browning 1025907 Single Groove Sheave 0.5 in Bore

Product Description

The BROWNING 1025907 is a finished bore single groove sheave designed for use with V-belt drive systems in HVAC, industrial, and mechanical power transmission applications. Cast iron construction gives this sheave the rigidity and wear resistance required for continuous-duty belt drive service. The 0.5 inch finished bore is ready to mount to a shaft without additional machining. The 2.2 inch outer diameter and 2.4 inch belt pitch diameter make this a compact sheave suited for small-frame motor and blower drive configurations. Licensed HVAC technicians and mechanical contractors commonly install this type of sheave during motor replacement or drive ratio adjustments.

This sheave fits residential and light commercial belt-drive blower assemblies, exhaust fans, and similar power transmission setups where B-section, A-section, or 3L-section V-belts are used. The pitch diameter for 4L or A belt type is 2.0 inches, and the pitch diameter for 3L belt type is 1.66 inches. The overall length through the bore is 15/16 inch, and the groove width is 21/32 inch. These dimensions make it suitable for compact drive packages where space is limited.

Key Features

• Finished bore at 0.5 inch — no additional machining required before installation
• Cast iron construction for durability in continuous-duty belt drive service
• Single groove design compatible with 3L, 4L, and A-section V-belts
• 2.4 inch belt pitch diameter for accurate drive ratio calculation
• 21/32 inch groove width fits standard V-belt cross sections
• Compact OD of 2.2 inches suits small-frame motor and blower applications

Compatibility

Compatible with 3L, 4L, and A-section V-belts. Designed as an OEM-style replacement sheave for residential and light commercial belt-drive blower and fan systems using a 0.5 inch shaft diameter.

Installation Notes

Installation should be performed by a qualified HVAC technician or mechanical contractor. Disconnect and lock out all electrical power to the unit before removing or installing any drive components. Ensure the sheave bore seats fully on the shaft and that the set screw is tightened securely before restoring power. Check belt tension and alignment after installation to prevent premature belt or bearing wear.