311-ZNR
300 Series Snap Ring Bearings
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Part No.
Part No.
311-ZNR
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
1.5 kg
Tolerance class
ABEC 1 | ISO P0
Seal type
Shielded
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:
$ 29.2
/ each
In Stock
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311-ZNR Bearing Product Overview & Core Advantages
The 311-ZNR is a single row deep groove ball bearing designed for robust performance in demanding industrial applications. Engineered to primarily handle radial loads, this metric bearing features a shielded design for contaminant protection and a snap ring fitted on the outer ring for simplified axial location and secure mounting. Manufactured to ABEC 1 | ISO P0 tolerance standards, it offers reliable precision and high operational consistency, making it an ideal choice for applications requiring dependable performance and ease of installation.
311-ZNR Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 311 | Standard bearing series designation, indicating the basic dimensions: 55mm bore, 120mm OD, 29mm width. |
| Z | Signifies a shielded bearing on one side, providing protection against large particulate contaminants. |
| NR | Indicates the outer ring has a snap ring groove and a fitted snap ring. This feature simplifies axial positioning within the housing, reducing assembly time and cost. |
311-ZNR Bearing Structural Features & Performance Benefits
- Robust Load Capacity: Built with high-grade chrome steel rings and balls, this bearing offers a high radial dynamic load rating of 17,805 lbf and a static load rating of 15,062 lbf, ensuring durability under significant stress.
- Simplified Assembly & Axial Location: The integrated snap ring (fitted) on the outer ring eliminates the need for complex housing shoulders or separate components, providing a secure and cost-effective mounting solution.
- Contaminant Protection: The shielded (Z) design helps to retain lubricant and exclude larger contaminants, enhancing bearing service life in less-than-ideal environments.
- Standard Precision & Clearance: Manufactured to ABEC 1 (ISO P0) tolerance with a CN (Normal) radial internal clearance, it delivers consistent, reliable performance for a wide range of general industrial applications.
311-ZNR Bearing Typical Application Areas
This bearing is well-suited for a variety of machinery and equipment, including:
- Electric Motors and Generators
- Industrial Gearboxes
- Material Handling Conveyors
- Agricultural Machinery
- Pumps and Blowers
