6311 NR
6300 Series Snap Ring Bearings
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Part No.
Part No.
6311 NR
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
1.41 kg
Tolerance class
P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.015mm to 0
Outside diameter
120 mm
Outside diameter tolerance
-0.015mm to 0
Width
29 mm
Width tolerance
-0.15mm to 0
Outer Ring Dimensions
Outer ring locating feature
Snap Ring (fitted)
Outside diameter of snap ring
129.7 mm
Width of snap ring
2.82 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
16658 lbf
Radial static load rating
10116 lbf
Limiting speed
8 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
No drawings available at the moment, will be launched soon
Price:
$ 20.6
/ each
In Stock
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6311 NR Bearing Product Overview & Core Advantages
The 6311 NR is a single row deep groove ball bearing designed for exceptional performance in applications requiring high radial load capacity and reliable operation. A key distinguishing feature is the snap ring (fitted) on its outer ring, which simplifies axial location within a housing, reduces assembly costs, and ensures secure positioning. Manufactured from high-grade chrome steel with a stainless steel cage, this open-type bearing offers robust construction, making it a versatile and cost-effective solution for a wide range of industrial machinery.
6311 NR Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Interpretation | Technical Significance |
|---|---|---|
| 6311 | Basic Bearing Number | Denotes a metric, single row deep groove ball bearing with a 55mm bore, 120mm OD, and 29mm width. |
| NR | Snap Ring (fitted) | Indicates the bearing is supplied with a snap ring fitted into a groove on the outer ring for axial location. |
| (Implied: Open) | Seal Type | No seals or shields, allowing for high-speed operation and custom lubrication regimes. |
6311 NR Bearing Structural Features & Performance Benefits
- Snap Ring Groove & Fitted Ring: The integrated snap ring provides a simple and effective method for axial location, eliminating the need for complex housing shoulders and reducing overall assembly size and weight. This feature is critical for high rigidity and secure mounting in applications where housing design is simplified.
- High Load Capacity: The deep groove raceway and robust construction enable the bearing to support significant radial loads (16,658 lbf dynamic, 10,116 lbf static), making it suitable for heavy-duty applications.
- Optimized for Speed: The standard P0 tolerance class and stainless steel cage contribute to stable operation and a high limiting speed of 8,000 rpm, suitable for a wide range of operational requirements.
- Versatile Lubrication: As an open bearing, it allows for the use of various lubricants (oil or grease) tailored to specific application needs, including high-temperature or specialized environments.
6311 NR Bearing Typical Application Areas
This bearing is ideally suited for applications requiring secure axial location and high radial load capacity, including:
- Electric Motors and Generators
- Gearboxes and Transmission Systems
- Industrial Fans and Blowers
- Material Handling Equipment (Conveyors, Pulleys)
- Agricultural Machinery
