Value Collection 20526974 V-belt Section B B77 79.9 in

Product Description

The VALUE COLLECTION 20526974 is a Section B classic V-belt designed for general-purpose power transmission in industrial and commercial mechanical drive applications. Built from rubber construction, this belt delivers reliable torque transfer across standard B-section sheaves and pulleys. The outside length measures 79.9 inches with an internal length of 78.80 inches, corresponding to the B77 belt designation. It is a direct-fit replacement for any application calling for a B77 classic V-belt. HVAC technicians, millwrights, and mechanical contractors are the primary installers of this component in fan and blower drive systems.

Section B V-belts in the B77 size are commonly used in residential and light commercial HVAC air handling units, blower assemblies, compressors, pumps, and other belt-driven equipment. This belt fits standard B-section grooved sheaves and pulleys found throughout HVAC, industrial, and agricultural machinery. It suits applications requiring a durable, flexible rubber belt in moderate-load drive systems where dimensional consistency and cross-section profile conformance are critical to proper operation and belt life.

Key Features

• Section B profile conforms to standard B-section sheave grooves for proper seating and load distribution
• 79.9 inch outside length and 78.80 inch internal length match the B77 belt designation
• Classic rubber construction provides flexibility and resistance to stretching under normal operating loads
• Single-belt packaging suits service calls and replacement scenarios where one belt is needed
• Suitable for fan, blower, pump, and compressor drive applications in HVAC and light industrial equipment

Compatibility

Designed as an OEM-style replacement for any belt-driven equipment requiring a B77 classic Section B V-belt with a 79.9 inch outside length and standard B-section sheave fitment.

Installation Notes

V-belt replacement is typically performed by HVAC technicians or mechanical contractors. Disconnect and lock out all electrical power to the unit before removing the old belt or adjusting sheaves. Use proper belt tension adjustment per the equipment manufacturer specifications — over-tensioning shortens belt and bearing life, while under-tensioning causes slippage and heat buildup. Inspect sheave grooves for wear, misalignment, or debris before installing the new belt.