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
Resources
Media
Frequently asked questions (FAQs)
How do 300-Series mounted ball bearings compare to roller bearings?
Compared with spherical rolling elements, 300-Series mounted ball bearings reduce contact where the balls meet the races. That lower contact reduces friction and heat, which extends lubrication life and reduces maintenance. They also preserve the high-speed performance associated with ball bearings while supporting moderate to heavy loads, making them a strong fit for demanding duty.
How do I choose the right 300-Series mounted ball bearing size?
Choosing the right 300-Series mounted ball bearing starts with the required bore size and housing configuration. The series is available in bore sizes from 1-7/16 inches to 3-15/16 inches, with options including a low backing height pillow block and a 2-bolt pillow block. For exact selection, use the nomenclature chart, catalog, or Dodge PT Wizard.
Where can I find 300-Series mounted ball bearing dimensions?
300-Series mounted ball bearing dimensions are available through the product’s CAD drawings and mounted ball bearing catalog. A mounted bearings nomenclature chart is also available to help identify the correct configuration. These resources support layout, design, and product selection when exact dimensional information is needed for a specific bearing arrangement.
Can 300-Series mounted ball bearings replace existing mounted bearings?
300-Series mounted ball bearings use a dimensionally interchangeable design, so they are intended for replacement situations where interchangeability with existing mounted bearings is required. They are also supplied pre-assembled and pre-lubricated for shaft-ready installation. Final replacement selection should be matched to the required dimensions, bore size, and housing configuration.
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