Multiple Locking Methods
Setscrew Locking
120° spaced, balanced three-point contact minimizes inner ring distortion vibration while reducing noise and improving reliability. Precision-manufactured diamond-faceted setscrews contribute to improved clamping and resistance to backout.
BOA Concentric
BOA is a concentric locking collar clamp design that results in near-perfect concentricity of the shaft to the bearing bore along with near-perfect ball path roundness, while also reducing fretting corrosion. This design eliminates shaft damage from setscrew locking and minimizes bearing-induced vibration for smoother, quieter operation. The collar has a Torx head cap screw that resists stripping 12 times longer than hex screws.
Eccentric Locking
Eccentric locking design incorporates a precision eccentric collar to mate with the inner ring extension for shaft hold.
Note: The eccentric is designed for a single direction of rotation and should not be used when two-direction rotation is present.
Sealing
A positive-contact molded nitrile rubber contact seal with an auxiliary flinger element comes standard. The contact seal allows grease purge and helps keep contamination out of the bearing, while the flinger provides a rotating shield that helps direct contamination away from the seal.
Anti-Rotation Rivet
An anti-rotation rivet prevents outer ring rotation (creep) within the housing.
Semi-Solid Cast Iron Base
This rugged base design provides an excellent mounting foundation. This is integral to preventing sheet metal “buckling.”
Zone Hardened Inner Race
Browning incorporates a unique heat treat process that hardens the inner race only where necessary, directly under the ball path. The zone hardened inner race delivers improved lock reliability as a result of less distortion at the setscrew location, and greater thread conformity for improved clamping and resistance to setscrew backout.
Identification Marking
Browning bearing units with a cast-iron housing include a sticker with the part description and a Browning® branded washer under the lubrication fitting. This provides simple verification of the part number during installation and replacement.
Air Handling “AH” Option
The Browning Air Handling mounted ball bearing offers the same features as the standard Browning mounted ball bearing in addition to the following air handling features:
AH Housing Fit
Air Handling “AH” ball bearings are manufactured with a controlled housing fit that allows the bearing to properly self-align when mounted on lightweight frames commonly found on air handling equipment.
Noise Test
All Air Handling “AH” bearings must pass a two-stage noise testing verification for quiet operation in order to meet the noise level standards of the air handling industry.
Popular shaft sizes and housing configurations in the normal and medium-duty series (designated by the AH suffix) are available “off the shelf.” These products are offered in both setscrew and BOA concentric locking styles.
