305 NR
300 Series Snap Ring Bearings
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Part No.
Part No.
305 NR
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.24 kg
Tolerance class
P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
62 mm
Outside diameter tolerance
-0.013mm to 0
Width
17 mm
Width tolerance
-0.12mm to 0
Outer Ring Dimensions
Outer ring locating feature
Snap Ring (fitted)
Outside diameter of snap ring
67.7 mm
Width of snap ring
1.7 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
5148 lbf
Radial static load rating
3507 lbf
Limiting speed
13 X 1000 rpm
Lubrication
None
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:
$ 8.89
/ each
In Stock
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305 NR Bearing Product Overview & Core Advantages
The 305 NR is a single row deep groove ball bearing designed for exceptional radial load capacity and reliable operation. Its key distinguishing feature is the snap ring (NR designation) fitted to the outer ring, which provides secure axial location within the housing, simplifying assembly and reducing overall design space. Manufactured with precision P0 tolerance and standard CN radial clearance, this bearing offers a robust and cost-effective solution for a wide range of industrial applications requiring high reliability and straightforward mounting.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 305 | Standard bearing series number, defining the bearing dimensions (25mm bore, 62mm OD, 17mm width). |
| NR | Indicates a snap ring is fitted to the outer ring. This feature acts as a locating shoulder, eliminating the need for a machined shoulder in the housing. |
305 NR Bearing Structural Features & Performance Benefits
- Snap Ring for Simplified Design: The integrated snap ring provides positive axial location, reducing housing complexity, assembly time, and total cost. The outer ring snap ring diameter is 67.7 mm with a width of 1.7 mm.
- High Load Capacity: Constructed from chrome steel rings and balls, this bearing delivers a high radial dynamic load rating of 5148 lbf and a radial static load rating of 3507 lbf, ensuring durability under demanding conditions.
- Optimized for Speed: The stainless steel cage ensures stability and allows for a limiting speed of 13,000 rpm, making it suitable for various high-speed applications.
- Open Design & Versatility: The open (unsealed) construction allows for the application of the most suitable lubrication method for the operating environment, offering maximum flexibility.
- Precision Engineering: Built to P0 tolerance class with a bore diameter tolerance of -0.01mm to 0, ensuring consistent performance and interchangeability.
305 NR Bearing Typical Application Areas
This bearing is ideally suited for applications where radial loads are predominant and secure axial location is beneficial. Common uses include:
- Electric Motors and Generators
- Gearboxes and Transmission Systems
- Industrial Fans and Blowers
- Agricultural Machinery
- Material Handling Equipment
- Pumps and Compressors
