718/6AC
Miniature Angular Contact Ball Bearings
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Basic Information
Main Dimensions
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Materials
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718/6AC Bearing Product Overview & Core Advantages
The 718/6AC is a miniature double row angular contact ball bearing engineered for applications requiring exceptional precision and reliability. This high-precision bearing is designed to accommodate combined loads—simultaneously handling significant radial loads and bidirectional axial loads. Its compact design, with a 6mm bore and 13mm outer diameter, makes it ideal for space-constrained, high-performance assemblies. Available in both sealed and open configurations, and with options for steel or ceramic balls, it offers versatility for demanding operational environments.
718/6AC Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Interpretation | Technical Significance |
|---|---|---|
| 718 | Series Designation | Denotes a miniature, double row angular contact ball bearing series. |
| 6 | Bore Diameter | Specifies a 6 mm bore diameter. |
| AC | Angular Contact | Indicates the bearing is of the angular contact type, optimized for combined loads. |
Key Configurations & Suffixes: This model is offered with various options, including Sealed or Open types, P5 (ABEC-5) or P4 (ABEC-13) precision classes, and Nylon or Phenolic cages. The 25° contact angle is a standard feature that balances axial and radial load capacity.
718/6AC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides superior rigidity and stability, enabling the bearing to support substantial combined loads (radial and bidirectional axial loads) effectively.
- Precision & High-Speed Performance: Manufactured to ABEC-5 (P5) or ABEC-13 (P4) tolerance classes, this bearing ensures smooth, quiet operation and is suitable for high-speed applications. The lightweight Nylon or Phenolic cage contributes to reduced centrifugal forces and lower operating temperatures.
- Material & Lubrication Versatility: The availability of Ceramic balls offers advantages in high-speed, high-temperature, or non-lubricated environments due to their lower density and corrosion resistance. The pre-lubricated and sealed versions provide long-term, maintenance-free operation by effectively retaining lubricant and excluding contaminants.
- Mounting Flexibility: As a Universal Matchable (SU) bearing, it can be mounted in various preload configurations (light, medium) by pairing bearings in specific arrangements, simplifying assembly and optimizing system performance.
718/6AC Bearing Typical Application Areas
- High-Speed Spindles in precision machining centers and PCB drilling machines
- Medical and Dental Handpieces
- Precision Instruments and optical encoders
- Small Motors and turbo-molecular pumps
- Robotics and automation joint assemblies
