Browning 766703 4-bolt Flange Bearing 1-7/16 in Id Air Handling

Product Description

The BROWNING 766703 is a 4-bolt flange bearing unit designed for air handling applications. It features a 1-7/16 inch bore and a cast iron housing, making it a durable choice for HVAC and industrial fan shaft support tasks. The bearing insert is a ball type with a set screw lock, rated for a static load capacity of 3,493 pounds and a dynamic load capacity of 5,782 pounds. Maximum operating speed is 4,000 RPM. The insert is manufactured from 52100 steel. Licensed HVAC technicians and mechanical contractors typically install this unit in blower assemblies, fan decks, and air handling unit drive trains where reliable shaft support is required.

This flange bearing is suited for residential and commercial air handling equipment, including blower and fan shaft applications where a 4-bolt mounting pattern is specified. It mounts to a flat surface using four 1/2 inch bolts on 3-5/8 inch center-to-center spacing. The overall envelope measures 4-5/8 inches in length and 4-5/8 inches in height, with a hub diameter of 3-5/8 inches. Lubrication is required during installation and at service intervals. This unit is part of the VF4S 200 series.

Key Features

• 1-7/16 inch bore with set screw lock for positive shaft retention
• Ball bearing insert manufactured from 52100 steel for durability under load
• Cast iron housing withstands vibration and thermal cycling in AHU environments
• Static load capacity of 3,493 pounds and dynamic load capacity of 5,782 pounds
• 4,000 RPM maximum speed rating suitable for fan and blower shaft speeds
• 4-bolt flange mounting pattern with 1/2 inch bolt holes on 3-5/8 inch centers

Compatibility

Designed as an OEM-style replacement or direct-install 4-bolt flange bearing for air handling unit blower and fan shaft applications requiring a 1-7/16 inch bore and VF4S 200 series fitment.

Installation Notes

Installation is typically performed by licensed HVAC technicians or millwrights. Disconnect and lock out all power to the air handling unit before beginning work. Secure the housing to a flat, rigid mounting surface using four 1/2 inch bolts, and verify shaft alignment before tightening fasteners. Apply appropriate grease to the bearing insert at installation per the manufacturer lubrication schedule, as lubrication is required for this unit.