Browning 1010735 3B66Q Qd Bushed V Belt Sheave 3 Groove

Product Description

The BROWNING 1010735, model 3B66Q, is a three-groove, QD-bushed V-belt sheave designed for power transmission applications in HVAC, industrial, and mechanical drive systems. The sheave features a 6.95-inch outside diameter and accepts Q1-style quick-detach bushings, allowing straightforward bore sizing across a range of shaft sizes from 0.75 inches to 2.6875 inches. With a belt pitch A diameter of 6.2 inches and a belt pitch B diameter of 6.6 inches, this sheave is suited for both A-section and B-section V-belt configurations. At 13.5 pounds, it is a solid, production-grade component installed by HVAC technicians and mechanical contractors in fan, blower, and pump drive assemblies.

This sheave is commonly used in belt-driven blower and fan systems found in commercial and residential HVAC equipment, as well as general-purpose industrial drive applications. The three-groove design allows it to carry multiple V-belts simultaneously, distributing load across the drive assembly. It is appropriate for new installations and direct replacement of worn or undersized sheaves where a Q1-style bushing is already in service or available. HVAC and mechanical technicians regularly use this part when resizing drives for motor replacements or system reconfigurations.

Key Features

• Three-groove configuration supports multi-belt A-section and B-section V-belt drive systems
• Q1-style QD bushing mount enables tool-accessible bore sizing and quick removal
• Bore range of 0.75 inches to 2.6875 inches accommodates a wide variety of shaft sizes
• 6.95-inch outside diameter with 6.2-inch A belt pitch diameter and 6.6-inch B belt pitch diameter
• Solid construction at 13.5 pounds provides stability in continuous-duty drive applications

Compatibility

Designed as a QD-bushed replacement sheave for three-groove V-belt drive assemblies using Q1-style bushings and A-section or B-section V-belts.

Installation Notes

Installation should be performed by a qualified HVAC technician or mechanical contractor. De-energize and lock out the motor and drive system completely before removing or installing the sheave. The Q1-style bushing must be properly seated and fastened to the correct torque specification per the bushing manufacturer before returning the drive to service. Inspect V-belts for wear and verify belt tension and alignment after installation to prevent premature sheave or belt wear.