Tb Wood's 2BK30118 Two Groove Sheave 1.125 in Bore

Product Description

The TB WOOD'S 2BK30118 is a finished bore two groove sheave designed for V-belt drive systems in industrial and mechanical power transmission applications. Machined from iron, this sheave features a 1.125-inch finished bore and a 3.15-inch outer diameter. With a belt pitch diameter of 2.8 inches for Type B and A belts and a 4L or A belt pitch diameter of 2.4 inches, it is suited for compact drive configurations. The overall bore length through the sheave is 1.09375 inches (1-3/32 inches). Licensed HVAC technicians, mechanical contractors, and industrial maintenance professionals typically install this component when servicing belt-driven blower and fan assemblies.

This two groove sheave fits standard V-belt drive applications found in commercial and residential HVAC equipment, industrial fans, pumps, and general-purpose machinery. It accepts Type B and 4L or A V-belts, making it compatible with common belt drive configurations in light to medium duty mechanical systems. The finished bore is ready for direct installation onto a shaft of the appropriate diameter without requiring additional machining.

Key Features

• Finished bore eliminates machining before installation
• Two groove design accommodates dual V-belt drive configurations
• Iron construction provides durability in continuous-duty applications
• Compatible with Type B, A, and 4L V-belts
• Compact 3.15-inch outer diameter suits space-constrained drive systems

Compatibility

Designed as an OEM-style replacement or direct-fit sheave for belt-driven fan and blower assemblies using Type B, A, or 4L V-belts with a 1.125-inch shaft bore requirement.

Installation Notes

Installation should be performed by a qualified mechanical or HVAC technician. Disconnect and lock out all power to the drive system before removing or installing any sheave. Ensure the shaft diameter matches the 1.125-inch finished bore before pressing the sheave into place, and verify proper belt alignment and tension after installation to prevent premature belt or bearing wear.