Browning 767791 4-bolt Flange Bearing 1-1/4 in Id

Product Description

The BROWNING 767791 is a 4-bolt flange bearing unit designed for mounting rotating shafts in industrial and mechanical drive applications. Built around a 1-1/4 inch bore, the unit uses an eccentric locking collar to secure the shaft without set-screw damage to the shaft surface. The housing is cast iron, providing rigid support under load. Static load capacity is 2,567 pounds and dynamic load capacity is 4,381 pounds. The insert is manufactured from 52100 steel, a bearing-grade alloy known for fatigue resistance. This bearing is installed by millwrights, maintenance mechanics, and industrial technicians working on conveyor systems, fans, blowers, and general power-transmission equipment.

This flange bearing is suited for light to medium industrial applications where a 4-bolt mounting pattern provides stable, vibration-resistant support. Overall length and overall height are each 4-1/4 inches, and the distance between mounting hole centers is 3-1/4 inches, which determines the bolt pattern footprint on the mounting surface. The 7/16 inch bolt size is standard for this flange class. Typical installations include conveyor head and tail shafts, drive shafts on material-handling equipment, and agricultural or industrial fan shaft support points.

Key Features

• 1-1/4 inch bore accepts standard shaft diameter with eccentric locking collar for positive shaft retention
• Static load capacity of 2,567 pounds and dynamic load capacity of 4,381 pounds
• Cast iron housing delivers rigid support and resistance to deflection under radial load
• 52100 steel insert for bearing-grade fatigue and wear resistance
• 4-bolt mounting pattern with 3-1/4 inch center-to-center distance for secure, low-vibration installation
• 7/16 inch bolt size aligns with standard hardware for straightforward field replacement

Compatibility

Designed as an OEM-style replacement or new-installation 4-bolt flange bearing for industrial shaft applications requiring a 1-1/4 inch bore and a 4-bolt cast iron housing.

Installation Notes

Installation should be performed by a qualified millwright or maintenance mechanic. De-energize and lock out all power to the drive system before removing or installing bearing units per LOTO procedures. Align the shaft and bearing housing carefully before tightening mounting bolts to avoid induced misalignment loads. Do not hammer the bearing directly onto the shaft; use a proper bearing installation tool or press to avoid damage to the insert or locking collar.