3308 DNRCBM
Double Row Angular Contact Ball Bearings
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Part No.
Part No.
3308 DNRCBM
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Double Row
Weight
1.2 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.013mm to 0
Width
36.5 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
1.5 mm
Distance from side face to load point
71 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
61.15 mm
Outer Ring Dimensions
Shoulder diameter outer ring
77.47 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
11115 lbf
Radial static load rating
9338 lbf
Limiting speed
7 X 1000 rpm
Lubrication
Lubricated
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Brass
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 54.12
/ each
In Stock
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3308 DNRCBM Bearing Product Overview & Core Advantages
The 3308 DNRCBM is a double row angular contact ball bearing designed for applications requiring high precision and exceptional rigidity. This precision bearing excels at simultaneously handling combined radial and axial loads from both directions, making it ideal for complex loading scenarios. Its compact design, featuring a 40 mm bore and 90 mm outside diameter, provides a robust solution for high-reliability machinery. Manufactured to a P6 (ABEC-3) tolerance class, it ensures consistent performance and long service life in demanding operational environments.
3308 DNRCBM Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| D | Double Row Construction |
| NR | Snap Ring Groove on the Outer Ring |
| C | Specific Internal Design & Contact Angle |
| BM | Brass Cage |
3308 DNRCBM Bearing Structural Features & Performance Benefits
- High Rigidity: The double row design significantly increases the bearing's moment stiffness, providing superior support and reducing deflection under heavy or moment loads.
- Superior Load Capacity: Engineered to handle substantial combined loads (radial and bidirectional axial loads), with a dynamic load rating of 11115 lbf and a static load rating of 9338 lbf.
- Optimized for Performance: The brass cage (BM) ensures stability and reliability at high rotational speeds, contributing to a limiting speed of 7,000 rpm. The open seal type allows for optimal lubrication management.
- Precision & Durability: Manufactured from chrome steel for both rings and balls, this bearing offers high wear resistance and dimensional stability, reinforced by the P6 precision tolerance.
3308 DNRCBM Bearing Typical Application Areas
This bearing is ideally suited for:
- Machine Tool Spindles
- Gearboxes and Transmission Systems
- Industrial Pumps and Compressors
- Precision Agricultural and Construction Equipment
- Applications requiring a snap ring for secure axial location
