312-ZNR
300 Series Snap Ring Bearings
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Part No.
Part No.
312-ZNR
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
1.85 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.015mm to 0
Outside diameter
130 mm
Outside diameter tolerance
-0.018mm to 0
Width
31 mm
Width tolerance
-0.15mm to 0
Outer Ring Dimensions
Outer ring locating feature
Snap Ring (fitted)
Outside diameter of snap ring
139.7 mm
Width of snap ring
2.82 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
20525 lbf
Radial static load rating
17535 lbf
Limiting speed
6 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
No drawings available at the moment, will be launched soon
Price:
$ 37.83
/ each
In Stock
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312-ZNR Bearing Product Overview & Core Advantages
The 312-ZNR is a single row deep groove ball bearing designed for exceptional performance in demanding industrial applications. This metric bearing features a shielded design on one side and a unique snap ring on the outer ring, enabling simplified axial location within a housing. Manufactured to P0 tolerance class, it offers reliable operation and high precision. Its core advantages include a high radial dynamic load rating of 20,525 lbf, making it suitable for applications requiring robust radial load capacity and simplified assembly.
312-ZNR Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning | Advantage |
|---|---|---|
| Z | Shield on one side | Protects against contamination from one side while allowing for lubrication access or ventilation. |
| NR | Snap Ring groove and snap ring fitted on the outer ring | Eliminates the need for a complex housing shoulder, simplifying design and reducing assembly time and cost. |
312-ZNR Bearing Structural Features & Performance Benefits
- Simplified Axial Location: The integrated snap ring (located in a groove on the outer diameter) provides a positive axial locating feature, securing the bearing in the housing without additional components. This enhances design efficiency and bearing stability.
- Contamination Protection: The shielded (Z) side effectively retains the grease lubrication and excludes larger contaminants, contributing to longer service life and reduced maintenance.
- High Load Capacity: Constructed from chrome steel rings and balls with a stainless steel cage, this bearing is engineered to handle significant radial loads, as indicated by its high dynamic and static load ratings.
- Standard Precision & Clearance: The P0 tolerance class and CN radial internal clearance ensure consistent performance and interoperability, suitable for a wide range of general industrial applications.
312-ZNR Bearing Typical Application Areas
This bearing is ideally suited for applications where axial location is critical and housing design aims for simplicity. Common uses include:
- Electric Motors and Generators
- Gearboxes and Power Transmission Systems
- Industrial Fans and Blowers
- Agricultural Machinery
- Material Handling Equipment
