Daikin 1129500 Fixed Sheave Single Groove BK57H 5.45 in Od

Product Description

The DAIKIN 1129500 is a fixed, single-groove bushed sheave used in belt-driven fan and blower assemblies found in commercial HVAC air handling units and rooftop equipment. This sheave accepts an H-series bushing and is designed for use with B-section or 5L-series V-belts. The outer diameter measures 5.45 inches with a 5.10-inch pitch diameter. It is a direct OEM replacement sourced from Browning (BK57H) and is installed by HVAC technicians servicing McQuay and Daikin commercial air-handling equipment.

This sheave is suited for commercial HVAC applications where belt-driven blower or supply fan assemblies require an OEM-spec fixed drive component. It replaces Daikin McQuay part numbers 01129500 and 011295X-00, as well as the Browning BK57H, making it a straightforward drop-in for service and maintenance work on compatible Daikin McQuay air handling units.

Key Features

• Fixed sheave design with a single groove for B-section or 5L V-belts
• Accepts H-series taper-lock bushing for secure shaft mounting
• 5.45-inch outer diameter with 5.10-inch pitch diameter
• OEM Daikin McQuay part — direct replacement for Browning BK57H
• Replaces part numbers 01129500 and 011295X-00

Compatibility

Direct OEM replacement for Daikin McQuay part numbers 01129500 and 011295X-00, and cross-references to Browning BK57H. Designed for use with B-section or 5L V-belts and H-series bushings in belt-driven commercial HVAC fan assemblies.

Installation Notes

Installation is performed by a qualified HVAC technician. Disconnect and lock out all electrical power to the unit before removing or installing drive components. Ensure the replacement H-series bushing is properly seated and torqued per the bushing manufacturer specifications before tensioning the belt. Verify belt alignment and tension after installation to prevent premature wear.