306728
200, 300 & 6400 Series Industrial Single Row Deep Groove Ball Bearings
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Part No.
Part No.
306728
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
30000 g
Tolerance class
P6
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
330 mm
Bore diameter tolerance
-0.03mm to 0
Outside diameter
460 mm
Outside diameter tolerance
-0.033mm to 0
Width
56 mm
Width tolerance
-0.4mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
63171 lbf
Radial static load rating
95544 lbf
Limiting speed
1.7 X 1000 rpm
Lubrication
None
Radial internal clearance
CN
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
Price available upon request.
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306728 Bearing Product Overview & Core Advantages
The 306728 metric ball bearing is a precision single row deep groove ball bearing engineered for demanding industrial applications. Characterized by its open design and manufactured to a P6 tolerance class, this bearing delivers exceptional running accuracy and reliability. Its primary function is to support high radial loads, with a substantial dynamic load rating of 63,171 lbf, making it an ideal choice for heavy-duty machinery where precision and durability are paramount. The construction from high-grade chrome steel for both rings and balls ensures long service life and consistent performance.
Model Code Breakdown
| Code Element | Technical Significance |
|---|---|
| 306728 | Basic bearing designation number. |
| Open | No seals or shields, allowing for higher speeds and custom lubrication schemes. |
| P6 | Tolerance class indicating superior dimensional and running accuracy compared to standard bearings. |
| CN | Standard (Normal) group of radial internal clearance. |
306728 Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to a P6 tolerance class with tight dimensional controls on the bearing dimensions (bore, OD, width), this bearing provides excellent rotational accuracy and system rigidity, minimizing vibration and runout.
- Superior Load Capacity: Engineered specifically for radial load applications, it features a high dynamic load rating of 63,171 lbf and a static load rating of 95,544 lbf, ensuring reliable performance under significant stress.
- Optimized for High-Speed Operation: The open design and stainless steel cage contribute to a high limiting speed of 1,700 rpm, making it suitable for applications requiring rapid rotation.
- Robust Material Construction: The use of chrome steel for rings and balls, combined with a durable stainless steel cage, offers high resistance to wear and fatigue, extending the bearing's operational lifespan.
- Flexible Lubrication: The open structure allows for the use of various lubricants tailored to specific operational needs, including high-temperature or specialized greases.
306728 Bearing Typical Application Areas
This precision ball bearing is ideally suited for heavy-duty industrial machinery and high-precision equipment, including:
- Large Industrial Gearboxes and Reducers
- Heavy-Duty Electric Motors
- Industrial Pumps and Compressors
- Material Handling Conveyor Systems
- Mining and Construction Machinery
- Paper and Steel Mill Equipment
