306-2ZNR
300 Series Snap Ring Bearings
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Part No.
Part No.
306-2ZNR
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.37 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
30 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.013mm to 0
Width
19 mm
Width tolerance
-0.12mm to 0
Outer Ring Dimensions
Outer ring locating feature
Snap Ring (fitted)
Outside diameter of snap ring
78.6 mm
Width of snap ring
1.7 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
6677 lbf
Radial static load rating
4856 lbf
Limiting speed
8.8 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:
$ 11.82
/ each
In Stock
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306-2ZNR Bearing Product Overview & Core Advantages
The 306-2ZNR is a single row deep groove ball bearing designed for exceptional reliability in demanding applications. This metric precision bearing features integral shielded protection and a snap ring groove on its outer ring, enabling simplified axial location within a housing. Its optimized geometry and high-grade chrome steel construction deliver robust radial load capacity and consistent performance, making it an ideal choice for applications requiring high operational reliability and simplified assembly.
306-2ZNR Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| 306 | Standard bearing series designation with a 30 mm bore diameter. | Defines core dimensions and load characteristics. |
| 2Z | Bearing is shielded on both sides. | Provides effective protection against contamination while allowing for high-speed operation compared to contact seals. |
| NR | Outer ring has a snap ring groove and is supplied with a snap ring. | Facilitates secure and cost-effective axial location of the bearing in the housing, simplifying design and assembly. |
306-2ZNR Bearing Structural Features & Performance Benefits
- Optimized Single Row Design: The deep groove raceway and precision-ground components enable smooth operation and efficient handling of high radial loads (Dynamic: 6677 lbf / Static: 4856 lbf).
- Integrated Sealing & Lubrication: The non-contact steel shields (2Z) retain the factory-applied grease lubricant and effectively exclude contaminants, contributing to a long, maintenance-free service life within the specified temperature range (-30° to 120 °C).
- Snap Ring Groove for Secure Mounting: The outer ring snap ring groove and supplied snap ring provide a positive axial locating feature, enhancing bearing stability and simplifying housing design by eliminating the need for complex shoulders or end caps.
- High-Speed Capability: The combination of a low-friction stainless steel cage, precision manufacturing (P0 tolerance), and shielded design allows for a high limiting speed of 8,800 rpm.
306-2ZNR Bearing Typical Application Areas
This versatile bearing is commonly specified in:
- Electric Motors and Generators
- Gearboxes and Power Transmission Systems
- Industrial Pumps and Compressors
- Material Handling Equipment
- Agricultural Machinery
