1218
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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1218 Bearing Product Overview & Core Advantages
The 1218 double row angular contact ball bearing represents a high-performance precision bearing solution engineered for demanding applications. Designed with a double row configuration, this bearing excels at simultaneously handling substantial radial loads while offering robust support. Its open design facilitates optimal lubrication flow, contributing to its impressive limiting speed of 5,300 rpm. Manufactured from high-grade chrome steel for both rings and balls, and featuring a durable stainless steel cage, the 1218 delivers exceptional reliability and long service life in high-precision, high-rigidity environments.
1218 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Significance |
|---|---|
| 1218 | Standard bearing designation indicating the bearing size with a 90mm bore and 160mm outside diameter. |
| Open | No integral seals or shields, allowing for higher speeds and custom lubrication systems. |
| Stainless Steel Cage | Cage material offering excellent corrosion resistance and durability for high-speed operation. |
1218 Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row ball complement and optimized internal geometry provide superior stiffness, making it ideal for applications requiring minimal shaft deflection. With a dynamic load rating of 12,870 lbf and a static load rating of 5,310 lbf, it is built to withstand significant combined loads.
Optimized High-Speed Performance: The lightweight, robust stainless steel cage ensures stable ball guidance, which is critical for maintaining performance at the high limiting speed. The open design minimizes friction and heat generation.
Precision & Durability: Manufactured from high-carbon chrome steel (AISI 52100 equivalent) and hardened to RC 60-65, the bearing offers exceptional wear resistance and dimensional stability under load. The tight bore diameter tolerance of -0.02mm to 0 ensures precise fits for high-precision assemblies.
1218 Bearing Typical Application Areas
- Machine Tool Spindles: Providing high rigidity and precision for milling, grinding, and turning centers.
- Industrial Gearboxes: Supporting shafts and handling radial loads in power transmission systems.
- Pumps and Compressors: Used in rotor assemblies where high-speed operation and reliability are paramount.
- Material Handling Equipment: Ideal for conveyor pulleys and other machinery requiring robust bearing solutions.
- Precision Industrial Machinery: Serving in applications demanding tight tolerances and long-term operational accuracy.
