311A-ZN
300 Series Snap Ring Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
311A-ZN
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 Groove
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:
$ 33.91
/ each
In Stock
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311A-ZN Bearing Product Overview & Core Advantages
The 311A-ZN is a single row deep groove ball bearing designed for reliable performance in demanding applications. Engineered with Chrome Steel construction throughout its rings, balls, and cage, it delivers excellent durability and consistent operation. A key feature is its shielded design (one side), which offers effective protection against contaminant ingress while maintaining high-speed capability. Its snap ring groove on the outer ring facilitates secure and simplified axial location within a housing, making it an ideal choice for applications requiring high radial load capacity and straightforward installation.
311A-ZN Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| A | Internal design variation, optimized for load distribution. |
| ZN | Indicates a snap ring groove on the outer ring and a shield on one side. This combination allows for secure mounting and basic contamination protection. |
311A-ZN Bearing Structural Features & Performance Benefits
- Robust Load Capacity: The single row deep groove geometry is fundamentally designed to support high radial loads (17,805 lbf dynamic / 15,062 lbf static), making it suitable for a wide range of industrial machinery.
- Simplified Axial Location: The integrated snap ring groove eliminates the need for complex housing shoulders or locknuts, reducing assembly time and cost while ensuring precise axial positioning.
- Contamination Resistance: The shielded design provides a primary defense against dust and debris, helping to maintain bearing integrity and extend service life in moderately dirty environments.
- Standard Precision & Clearance: Manufactured to ABEC 1 | ISO P0 tolerance class with CN radial internal clearance, ensuring reliable, cost-effective performance for general industrial applications.
311A-ZN Bearing Typical Application Areas
This bearing is commonly specified in applications requiring robust radial support and easy mounting. Key sectors include:
- Electric Motors and Gearboxes
- Industrial Pumps and Fans
- Agricultural Machinery
- Material Handling Conveyors
- Automotive Components (e.g., alternators, idler pulleys)
