307 NR
300 Series Snap Ring Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
307 NR
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.48 kg
Tolerance class
P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.012mm to 0
Outside diameter
80 mm
Outside diameter tolerance
-0.013mm to 0
Width
21 mm
Width tolerance
-0.12mm to 0
Outer Ring Dimensions
Outer ring locating feature
Snap Ring (fitted)
Outside diameter of snap ring
86.6 mm
Width of snap ring
1.7 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
7801 lbf
Radial static load rating
5957 lbf
Limiting speed
9.5 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:
$ 12.19
/ each
In Stock
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307 NR Bearing Product Overview & Core Advantages
The 307 NR is a single row deep groove ball bearing designed for robust performance in radial load applications. Its key distinguishing feature is the integral snap ring on the outer ring, which simplifies housing design by providing positive axial location without requiring complex machining. Manufactured to P0 tolerance class with standard CN radial internal clearance, this bearing offers reliable operation and high precision. The open design allows for versatile lubrication options, making it suitable for a wide range of industrial machinery.
307 NR Bearing Model Code Explained, Specifications & Naming Convention
The model designation 307 NR can be broken down as follows:
- 307: Standard bearing series number, indicating specific dimensions (35mm bore, 80mm OD, 21mm width).
- NR: Signifies that the bearing is fitted with a Snap Ring (fitted) on its outer ring. This feature acts as a locating shoulder, simplifying assembly and reducing housing costs.
307 NR Bearing Structural Features & Performance Benefits
- Snap Ring Locating Feature: The integrated snap ring provides a positive axial location for the bearing within the housing. This eliminates the need for complex shoulder machining, leading to simplified assembly and reduced total system cost.
- High Load Capacity: The single row deep groove construction is optimized to carry significant radial loads (Dynamic: 7801 lbf, Static: 5957 lbf).
- Precision & Reliability: Built to P0 tolerance class with a CN radial internal clearance, ensuring consistent performance and smooth operation.
- High-Speed Capability: With a limiting speed of 9,500 rpm, it is suitable for a variety of high-speed applications. The stainless steel cage ensures cage integrity and durability at high rotational speeds.
- Material Quality: Rings and balls made from chrome steel provide high hardness and wear resistance, contributing to a long service life.
307 NR Bearing Typical Application Areas
This bearing is ideal for applications requiring reliable radial load support and simplified axial location. Common uses include:
- Electric Motors and Generators
- Gearboxes and Transmission Systems
- Industrial Fans and Blowers
- Agricultural Machinery
- Conveyor Systems
- Any application where a snap ring groove in the housing is impractical or costly to machine.
