3308 A
Double Row Angular Contact Ball Bearings
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Part No.
Part No.
3308 A
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Double Row
Weight
0.93 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
53 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
14738 lbf
Radial static load rating
10800 lbf
Limiting speed
7.5 X 1000 rpm
Lubrication
Lubricated
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:
$ 18.07
/ each
In Stock
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3308 A Bearing Product Overview & Core Advantages
The 3308 A is a double row angular contact ball bearing designed for applications requiring high precision and exceptional rigidity. This metric bearing excels at simultaneously handling combined loads—significant radial forces and bidirectional axial loads—within a single, compact unit. Manufactured to a P6 (ABEC-3) tolerance class, it delivers the running accuracy essential for high-performance machinery. Its open design, when paired with high-quality lubrication, supports reliable operation at high speeds up to 7,500 rpm, making it a robust and dependable choice for demanding industrial environments.
3308 A Bearing Model Code Explained, Specifications & Naming Convention
The model number 3308 A can be broken down as follows:
- 3308: Basic series designation, indicating a double row angular contact ball bearing with a 40mm bore, 90mm OD, and 36.5mm width.
- A: Denotes a 30° contact angle. This specific angle optimizes the bearing's performance for carrying substantial axial loads in both directions while maintaining excellent radial load capacity.
3308 A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The double row design provides superior radial and axial stiffness compared to single row bearings. This construction enables it to support heavy combined loads effectively, with a dynamic load rating of 14,738 lbf and a static load rating of 10,800 lbf.
- Optimized for High-Speed Operation: The standard stainless steel cage ensures low friction and stable operation, contributing to the bearing's high limiting speed. The pre-lubrication facilitates immediate startup and smooth running.
- Precision Engineering: Built to P6 tolerance with tight dimensional controls on the bore diameter, outside diameter, and width, this bearing guarantees precise shaft positioning and minimal runout, which is critical for applications like machine tool spindles.
- Durable Material Construction: The rings and balls are made from high-grade chrome steel, offering excellent wear resistance and longevity, while the stainless steel cage provides corrosion resistance.
3308 A Bearing Typical Application Areas
The 3308 A bearing is ideally suited for a wide range of high-precision and high-load machinery, including:
- Machine Tool Spindles
- Industrial Gearboxes
- Pumps and Compressors
- Precision Agricultural Equipment
- Material Handling Systems
