1212 EKTN9/C3
1200 Series Self Aligning Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
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1212 EKTN9/C3 Bearing Product Overview & Core Advantages
The 1212 EKTN9/C3 is a metric double row angular contact ball bearing engineered for demanding applications requiring high rigidity and reliable performance under combined loads. Featuring a tapered bore design (1:12 ratio), this precision bearing offers exceptional running accuracy and stability. Its double row construction provides superior radial load capacity and can accommodate axial loads in both directions, making it an ideal compact solution for high-precision machinery where space constraints and high rigidity are critical factors.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 1212 | Standard bearing series designation with 60mm bore, 110mm OD |
| EK | Optimized internal design with reinforced contact angles |
| TN9 | Nylon cage, glass fiber reinforced, suitable for high-speed operation |
| C3 | Greater than normal radial internal clearance for thermal expansion management |
1212 EKTN9/C3 Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row angular contact design provides significantly increased bearing rigidity compared to single row bearings, enabling stable operation under heavy combined radial and axial loads. The optimized contact angles distribute loads evenly across both rows of precision-ground chrome steel balls.
High-Speed Capability: The TN9 nylon cage offers excellent performance at high rotational speeds (limiting speed: 8,000 rpm), reducing friction and heat generation while maintaining dimensional stability. The cage's lightweight construction minimizes centrifugal forces, contributing to the bearing's exceptional high-speed performance.
Tapered Bore Design: The 1:12 taper bore allows for precise mounting on tapered shafts or with adapter sleeves, ensuring secure fitment and eliminating internal clearance for applications requiring maximum running accuracy.
Pre-optimized Clearance: The C3 radial clearance provides adequate internal space for thermal expansion in applications with elevated operating temperatures or where interference fits are used, preventing premature bearing failure due to excessive preload.
1212 EKTN9/C3 Bearing Typical Application Areas
- Machine tool spindles and precision machining centers
- Industrial gearboxes and power transmission systems
- Pump and compressor shafts requiring high rigidity
- Material handling equipment and conveyor systems
- Electric motor applications with combined loading conditions
- Agricultural machinery and heavy-duty industrial equipment
