311NR J
300 Series Snap Ring Bearings
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Part No.
Part No.
311NR J
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
1.5 kg
Tolerance class
ABEC 1 | ISO 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)
Performance
Temperature range
-30°to 120 °C
Radial dynamic load rating
17805 lbf
Radial static load rating
15062 lbf
Limiting speed
6.3 X 1000 rpm
Lubrication
None
Radial internal clearance
CN
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Chrome Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 29.6
/ each
In Stock
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311NR J Bearing Product Overview & Core Advantages
The 311NR J is a single row deep groove ball bearing engineered for superior performance in radial load applications. This metric bearing features an open design and a unique snap ring fitted on the outer ring, providing secure axial location within a housing. Manufactured to ABEC 1 | ISO P0 tolerance standards, it delivers reliable operation and consistent precision. Its robust construction from chrome steel ensures high durability and a long service life, making it an excellent choice for general industrial machinery requiring dependable radial load support.
311NR J Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| NR | The outer ring has a snap ring groove, allowing for simplified axial location and secure housing fit. |
| J | Indicates a stamped steel cage design, offering a lightweight and cost-effective solution. |
311NR J Bearing Structural Features & Performance Benefits
- Simplified Assembly & Location: The integrated snap ring (fitted) eliminates the need for complex housing shoulders or separate components, streamlining the assembly process and providing reliable axial positioning.
- High Load Capacity: The deep groove raceway and chrome steel construction enable high radial dynamic load rating (17,805 lbf) and static load rating (15,062 lbf), ensuring robust performance under demanding conditions.
- Optimized for Standard Applications: With a limiting speed of 6,300 rpm and standard CN radial internal clearance, this bearing is well-suited for a wide range of industrial applications requiring reliable, maintenance-free operation.
- Material Integrity: All core components—rings, balls, and cage—are manufactured from chrome steel, providing consistent hardness, wear resistance, and dimensional stability across a temperature range of -30°C to 120°C.
311NR J Bearing Typical Application Areas
This bearing is ideal for applications requiring secure axial location and handling significant radial loads. Common uses include:
- Electric Motors and Gearboxes
- Industrial Fans and Blowers
- Conveyor Systems
- Agricultural Machinery
- Material Handling Equipment
