Browning 766701 4-bolt Flange Air Handling Bearing Unit

Product Description

The BROWNING 766701 is a 4-bolt flange bearing unit designed for air handling applications in HVAC and industrial fan systems. It accepts a 1-3/16 inch shaft bore and uses a set screw locking collar to secure the shaft in place. The cast iron housing and 52100 steel insert deliver a static load capacity of 2,567 pounds and a dynamic load capacity of 4,381 pounds, making this unit appropriate for continuous-duty fan and blower service. The overall footprint is 4-1/4 inches in both length and height, with mounting hole centers spaced 3-1/4 inches apart. Licensed HVAC technicians and mechanical contractors install this unit as part of fan assemblies, blower decks, and air handler drive systems.

This bearing unit is suited for residential and light commercial air handling equipment where a 4-bolt flange mount is required. Typical applications include supply and return fan shafts in rooftop units, air handlers, and ventilation fan assemblies. The 4-bolt pattern provides a secure, vibration-resistant mount in equipment that runs continuously. The 1-3/16 inch bore accommodates common fan shaft diameters found in packaged HVAC equipment and standalone blower assemblies.

Key Features

• 1-3/16 inch bore ID with set screw locking for positive shaft retention
• 2,567 pound static load capacity and 4,381 pound dynamic load capacity
• Cast iron housing for durability in continuous-duty air handling environments
• 52100 steel bearing insert for extended service life under radial load
• 4-bolt flange mounting pattern with 3-1/4 inch center-to-center hole spacing
• Compact 4-1/4 inch x 4-1/4 inch overall envelope fits standard fan deck layouts

Compatibility

Designed as an OEM-style replacement flange bearing unit for air handling equipment requiring a 4-bolt flange mount with a 1-3/16 inch shaft bore and 3-1/4 inch mounting hole center spacing.

Installation Notes

Installation is typically performed by a licensed HVAC technician or millwright as part of fan shaft service or replacement. Disconnect and lock out all electrical power to the air handler or fan system before beginning work. Ensure the shaft is clean and free of burrs before inserting into the bore, and tighten set screws according to the equipment manufacturer specifications. Follow applicable ASHRAE and local mechanical codes when servicing air handling equipment in occupied buildings.