Browning 1042480 Qd Bushed V Belt Sheave 1 Groove BK57H

Product Description

The BROWNING 1042480 is a single-groove, QD bushed V-belt sheave designed for power transmission applications in HVAC, industrial, and mechanical drive systems. Also identified by the model designation BK57H, this sheave features a 5.45-inch outside diameter and accepts an H-style QD bushing, allowing bore sizes from 3/8 inch to 1-1/2 inch to suit a range of shaft dimensions. The A-belt pitch diameter is 4.7 inches and the B-belt pitch diameter is 5.1 inches. Weighing 2.8 pounds, this cast sheave installs with a standard QD bushing system for secure, repeatable mounting without requiring custom machining.

This sheave is a common replacement component in belt-driven HVAC blower assemblies, fan systems, and light industrial drive trains. The single-groove configuration suits straightforward single-belt drive setups. The QD bushing mount simplifies field installation and removal, making it practical for maintenance technicians servicing rooftop units, air handlers, and belt-driven exhaust or supply fans where drive ratios require a sheave in this diameter range.

Key Features

• Single-groove design compatible with standard A-profile and B-profile V-belts
• 5.45-inch outside diameter with 4.7-inch A-belt pitch diameter and 5.1-inch B-belt pitch diameter
• Bore range from 3/8 inch to 1-1/2 inch via H-style QD bushing
• QD bushing mount allows fast field installation and removal without special tooling
• Compact and lightweight at 2.8 pounds for easy handling during service

Compatibility

Designed as an OEM-style replacement single-groove QD bushed V-belt sheave for belt-driven blower and fan assemblies requiring an H-style QD bushing and a 5.45-inch outside diameter sheave.

Installation Notes

Installation is typically performed by qualified HVAC technicians or millwrights. Disconnect and lock out all power to the drive system before removing or installing the sheave. The H-style QD bushing must be sourced separately and torqued per the bushing manufacturer specifications. After installation, verify belt tension and sheave alignment before returning the system to service.