1208KTNC3
1200 Series Self Aligning Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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1208KTNC3 Bearing Product Overview & Core Advantages
The 1208KTNC3 is a metric double row angular contact ball bearing engineered for applications requiring robust support for radial loads. Featuring a tapered bore (1:12) and a C3 radial internal clearance, it is designed for precise interference fits on tapered shafts, ensuring secure mounting and enhanced operational stability. Its double row construction provides high rigidity and load-carrying capacity in a compact 18 mm width, making it suitable for demanding industrial environments. Pre-lubricated and constructed with chrome steel rings and a durable nylon cage, this bearing offers reliable performance and is compliant with ROHS and REACH standards.
1208KTNC3 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
| 1208 | Basic designation: 40 mm bore diameter, 80 mm outside diameter |
| K | Tapered bore with 1:12 ratio for precise shaft mounting |
| TN | Nylon (polyamide) cage for reduced weight and smooth operation |
| C3 | Greater than normal radial internal clearance for thermal expansion applications |
1208KTNC3 Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row ball bearing design provides superior radial stiffness and increased radial dynamic load rating (4478 lbf), making it ideal for applications with significant radial forces.
Precision Tapered Bore: The 1:12 tapered bore enables precise axial positioning and secure interference fits on adapter sleeves or tapered shafts, preventing creep and maintaining alignment.
Optimized High-Speed Performance: The lightweight nylon cage (TN) reduces centrifugal forces, while the C3 clearance accommodates thermal expansion, collectively supporting a limiting speed of 11,000 rpm.
Durability & Maintenance: Manufactured from chrome steel for both rings and balls, the bearing ensures high wear resistance and longevity. The pre-lubrication and open seal type allow for easy re-lubrication in service, supporting operation within a temperature range of -30°C to 110°C.
1208KTNC3 Bearing Typical Application Areas
- Electric Motors & Generators – For rotor support where tapered shafts are used.
- Industrial Gearboxes – Handling radial loads in compact spaces.
- Material Handling Equipment – Conveyor pulleys and rollers requiring high radial load capacity.
- Agricultural Machinery – Implement wheels and drivelines with tapered mounting.
- Ventilation & Pump Systems – Fans and pumps operating at moderate to high speeds.
