1208KJ
1200 Series Self Aligning Ball Bearings
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Part No.
Part No.
1208KJ
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Double Row
Weight
0.42 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
80 mm
Outside diameter tolerance
-0.013mm to 0
Width
18 mm
Width tolerance
-0.12mm to 0
Chamfer dimension
1.1 mm
Inner Ring Dimensions
Shoulder diameter inner ring
53.85 mm
Outer Ring Dimensions
Shoulder diameter outer ring
67.5 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
4478 lbf
Radial static load rating
1564 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Lubricated
Radial internal clearance
CN
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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1208KJ Bearing Product Overview & Core Advantages
The 1208KJ is a metric double row angular contact ball bearing designed for demanding applications requiring high precision and reliability. Featuring a 1:12 tapered bore for secure shaft mounting, this bearing excels at handling significant combined radial and axial loads simultaneously. Its compact double row design provides superior rigidity and stability in a relatively narrow width, making it an ideal solution for space-constrained, high-performance machinery. Manufactured from high-grade chrome steel and pre-lubricated for immediate use, it offers dependable operation within a wide temperature range.
1208KJ Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 1208 | Standard bore diameter code (40 mm) and dimension series. |
| K | Indicates a tapered bore with a 1:12 taper ratio for precise interference fit on the shaft. |
| J | Specifies the internal radial clearance group is CN (Normal clearance). |
1208KJ Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row ball construction provides exceptional stiffness, enabling the bearing to support substantial combined loads (radial and axial) without significant deflection.
- Tapered Bore Design: The 1:12 tapered bore ensures a secure, interference fit on a tapered shaft adapter, eliminating inner ring creep and enhancing operational stability under heavy loads and vibration.
- Optimized Material & Construction: Components made from chrome steel and a steel cage offer high strength, durability, and consistent performance at the specified limiting speed of 11,000 rpm.
- Pre-Lubricated & Ready-to-Use: The bearing comes pre-lubricated, simplifying installation and providing immediate protection, suitable for a standard operating temperature range of -30°C to 110°C.
- Precise Dimensional Tolerances: Tight tolerances on the bore diameter, outside diameter, and width ensure precise fitment and reliable performance in high-accuracy assemblies.
1208KJ Bearing Typical Application Areas
This bearing is ideally suited for applications requiring robust support and high precision, including:
- Machine Tool Spindles
- Gearboxes and Transmissions
- Industrial Pumps and Compressors
- Agricultural Machinery
- Material Handling Equipment
