300-Series

Mounted Ball Bearings

Engineered for high-speed and heavy-load applications

300-Series mounted ball bearings are built for applications that push beyond the limits of designs with 200-series rolling elements, including air-handling, agricultural, cotton ginning, and similar equipment.

Larger rolling elements support moderate to heavy loads while preserving the high-speed performance ball bearings are known for, delivering a balanced combination of load capacity and speed.

Key features and benefits

Recessed housing design

Unique recessed housing design makes set screws easily accessible, allowing for fast and easy installation.

Mechanically retained, single-lip seal

Mechanically retained, single-lip seal prevents seal blowout and contamination.

Sensor-ready housing

Pre-drilled and tapped housing for quick and easy installation of OPTIFY™ Performance Sensor for real-time temperature and vibration monitoring.

Readily available to order from stock, reducing lead times and keeping your equipment moving
OPTIFY Intelli-Lube®-compatible for hands-free, automatic lubrication
Reduced contact at the points where the ball rolling elements meet the races lowers friction and heat, extending lubrication life and reducing maintenance when compared to spherical rolling elements
Dimensionally interchangeable design
Proven 65-degree set screw angle that maximizes radial and axial shaft holding power
Capable of +/- two degrees static misalignment
Available in bore sizes ranging from 1-7/16 inches to 3-15/16 inches, delivering reliable performance in a variety of demanding environments
Low backing height pillow block available
Available in 2-bolt pillow block
Pre-assembled and pre-lubricated for shaft-ready installation out of the box
Heavy duty ball rolling elements