Browning 1025808 Single Groove Sheave 0.5 in Bore Cast Iron

Product Description

The BROWNING 1025808 is a finished bore single groove sheave designed for use in V-belt drive systems. Manufactured from cast iron, this sheave features a 0.5 inch bore diameter and a 1.75 inch outside diameter, making it suited for compact drive arrangements. The groove accommodates Type 4L or A belts at a 1.5 inch pitch diameter and Type 3L belts at a 1.16 inch pitch diameter. The through-bore length measures 15/16 inch and the face width is 21/32 inch. Licensed HVAC technicians, millwrights, and mechanical contractors install these sheaves on fan shafts, blower assemblies, and light-duty power transmission applications where precise belt alignment is required.

This sheave is appropriate for residential and light commercial HVAC blower drives, small conveyor systems, and general power transmission setups. Its finished bore means the bore is machined to final dimension at the factory, eliminating the need for additional boring before installation. The compact outer diameter makes it a practical fit in tight equipment envelopes where clearance around the pulley is limited. Install with a matching V-belt and mating sheave to complete the drive assembly.

Key Features

• Finished bore at 0.5 inch — ready to install without additional machining
• Cast iron construction for durability in belt drive applications
• Single groove design accepts Type 4L or A and Type 3L V-belts
• 1.5 inch pitch diameter for Type 4L or A belt; 1.16 inch pitch diameter for Type 3L belt
• Compact 1.75 inch OD suits space-constrained drive assemblies
• Face width of 21/32 inch with a through-bore length of 15/16 inch

Compatibility

Designed as an OEM-style replacement single groove sheave for light-duty V-belt drive systems requiring a 0.5 inch bore and compatibility with Type 3L, 4L, or A V-belts.

Installation Notes

Installation of this sheave is typically performed by a licensed HVAC technician or qualified millwright. Disconnect and lock out all power to the drive system before removing or installing any sheave. Confirm shaft diameter matches the 0.5 inch finished bore before pressing or sliding the sheave onto the shaft, and use a suitable keyed shaft or set screw arrangement as required by the equipment design. After installation, verify proper belt tension and sheave alignment using a straightedge or laser alignment tool before returning the system to service.