Browning 1033489 Two Groove Cast Iron Sheave 4.25in Od

Product Description

The BROWNING 1033489 is a two-groove, finished bore sheave designed for V-belt drive systems in HVAC, industrial, and mechanical equipment applications. Cast from iron for durability, it features a 4.25-inch outer diameter and a 1.125-inch finished bore that accepts the shaft without additional machining. The belt pitch diameter is 3.5 inches for Type A or 4L belts, with a B-section pitch diameter of 3.9 inches. The through-bore length measures 1-15/32 inches. This sheave is installed by HVAC technicians and mechanical contractors as part of blower, fan, or pump drive assemblies where precise belt alignment and reliable torque transfer are required.

This sheave suits residential and light commercial HVAC air handlers, belt-drive blower assemblies, and similar V-belt drive applications. It is compatible with standard Type A and 4L V-belts. The finished bore design simplifies installation on straight shafts within the specified bore diameter. Technicians working on belt-drive fan systems or replacing worn sheaves in existing drive trains will find this a direct-fit component where the 1.125-inch bore and 4.25-inch OD dimensions match the original drive configuration.

Key Features

• Two-groove design supports dual V-belt drive configurations for balanced load distribution
• Finished bore at 1.125 inches accepts shaft installation without additional boring or machining
• Cast iron construction provides strength and wear resistance in continuous-duty drive applications
• Compatible with Type A and 4L V-belts with a 3.5-inch pitch diameter
• B-section belt pitch diameter of 3.9 inches for flexible drive pairing options
• Through-bore length of 1-15/32 inches suits standard shaft hub configurations

Compatibility

Designed as an OEM-style replacement sheave for belt-drive systems using Type A or 4L V-belts with a 1.125-inch shaft bore and 4.25-inch outer diameter requirement.

Installation Notes

Installation should be performed by a qualified HVAC technician or mechanical contractor. Disconnect and lock out all power to the equipment before removing or installing any drive components. Ensure the shaft is clean and free of burrs before sliding the sheave into position, and verify belt tension and alignment after installation per the drive manufacturer's guidelines. Proper sheave alignment reduces belt wear and bearing load.