313-2ZNR
300 Series Snap Ring Bearings
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Part No.
Part No.
313-2ZNR
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
2.3 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
65 mm
Bore diameter tolerance
-0.015mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.018mm to 0
Width
33 mm
Width tolerance
-0.15mm to 0
Outer Ring Dimensions
Outer ring locating feature
Snap Ring (fitted)
Outside diameter of snap ring
149.7 mm
Width of snap ring
2.82 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
22931 lbf
Radial static load rating
20233 lbf
Limiting speed
4.3 X 1000 rpm
Lubrication
Grease
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
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313-2ZNR Bearing Product Overview & Core Advantages
The 313-2ZNR is a single row deep groove ball bearing designed for exceptional performance in demanding industrial applications. This shielded bearing features an integral snap ring on its outer ring, enabling simplified axial location within a housing. Manufactured from high-grade chrome steel with a stainless steel cage, it delivers reliable operation and a long service life. Its key advantages include high radial load capacity, the convenience of pre-applied grease lubrication, and robust contamination protection from its shielded design, making it a versatile and durable solution for a wide range of machinery.
313-2ZNR Bearing Model Code Explained, Specifications & Naming Convention
The model number 313-2ZNR provides specific technical information about the bearing's features:
- 313: The basic bearing series, indicating the dimensional series (width and outer diameter proportions) and a 65mm bore diameter.
- 2Z: Denotes that the bearing is equipped with non-contact shields on both sides. These shields protect the internal components from contamination while minimizing friction.
- N: Indicates that the bearing has a snap ring groove on its outer ring.
- R: Specifies that the bearing is supplied with the snap ring fitted onto the outer ring.
313-2ZNR Bearing Structural Features & Performance Benefits
- High Load Capacity & Rigidity: The single row deep groove raceway geometry is optimized to support high radial loads (dynamic: 22,931 lbf, static: 20,233 lbf). The robust construction using chrome steel rings and balls ensures dimensional stability under load.
- Simplified Assembly & Axial Location: The integrated snap ring (fitted) allows for secure axial positioning within a housing without the need for complex shoulder machining or additional components, reducing assembly time and cost.
- Contamination Protection & Low Maintenance: The non-contact shields (2Z) effectively protect the bearing interior from dust and debris, while the pre-applied grease lubrication provides long-term, maintenance-free operation within the specified temperature range (-30°C to 120°C).
- Precision & Speed: Built to P0 tolerance class and standard CN radial internal clearance, this bearing offers consistent performance and is capable of operating at a limiting speed of 4,300 rpm.
313-2ZNR Bearing Typical Application Areas
This bearing is ideally suited for applications requiring robust radial support and simplified housing design. Common uses include:
- Electric Motors and Generators
- Gearboxes and Transmission Systems
- Industrial Pumps and Compressors
- Material Handling Equipment (e.g., conveyor pulleys)
- Agricultural Machinery
- Any application where a snap ring is specified for secure outer ring location.
