1308SK
1300 Series Self Aligning Ball Bearings
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Part No.
Part No.
1308SK
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Double Row
Weight
0.68 kg
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.012mm to 0
Bore type
Taper 1:12
Outside diameter
90 mm
Outside diameter tolerance
-0.015mm to 0
Width
23 mm
Width tolerance
-0.12mm to 0
Chamfer dimension
1.1 mm
Inner Ring Dimensions
Shoulder diameter inner ring
61.47 mm
Outer Ring Dimensions
Shoulder diameter outer ring
80.2 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
7605 lbf
Radial static load rating
2520 lbf
Limiting speed
9.5 X 1000 rpm
Lubrication
Lubricated
Radial internal clearance
CN
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Nylon
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
Price available upon request.
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1308SK Bearing Product Overview & Core Advantages
The 1308SK is a metric double row angular contact ball bearing engineered for applications requiring high precision and robust performance. Featuring a tapered bore (1:12) and open construction, this bearing delivers exceptional radial load capacity while maintaining dimensional stability. Its double row design provides high rigidity and is ideal for compact spaces where reliable operation under substantial loads is critical. Manufactured from chrome steel with a nylon cage, it offers excellent durability and smooth operation across a wide temperature range (-30° to 110°C).
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 1308 | Standard bearing series designation with 40mm bore, 90mm OD |
| SK | Indicates tapered bore (1:12) for precise shaft fitting and open seal type construction |
1308SK Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design provides superior stiffness and can handle significant radial loads (7605 lbf dynamic rating). The tapered bore ensures secure mounting on tapered shafts, enhancing system stability.
- Optimized for Precision: Manufactured with chrome steel rings and balls for consistent performance. The nylon cage reduces friction, supports smooth operation, and is suitable for high-speed applications (limiting speed: 9,500 rpm).
- Standard Internal Clearance & Lubrication: Features CN radial internal clearance for general applications and comes pre-lubricated for immediate use, reducing initial setup time.
- Dimensional Accuracy: Tight tolerances on bore (-0.012mm to 0), outside diameter (-0.015mm to 0), and width (-0.12mm to 0) ensure reliable fit and performance in precision assemblies.
1308SK Bearing Typical Application Areas
- Industrial Gearboxes and Transmissions
- Machine Tool Spindles and Precision Machinery
- Pumps and Compressors
- Material Handling Equipment
- Agricultural and Construction Machinery
