718/6C
Miniature Angular Contact Ball Bearings
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718/6C Bearing Product Overview & Core Advantages
The 718/6C is a premium miniature angular contact ball bearing designed for applications demanding exceptional precision and reliability. Engineered to handle combined loads (simultaneous radial and axial forces), this bearing features a compact design with a 6mm bore, 13mm OD, and 5mm width, making it ideal for space-constrained, high-performance mechanisms. Its availability in P5 (ABEC-5) and P4 (ABEC-12) precision classes ensures superior running accuracy, while options for steel or ceramic balls and various cage materials provide tailored solutions for specific performance requirements, including high-speed operation and extended service life.
718/6C Bearing Model Code Explained, Specifications & Naming Convention
The model number 718/6C can be broken down as follows, with common suffixes explained:
- 718: Series designation for miniature angular contact ball bearings.
- 6: Nominal bore diameter in millimeters (6 mm).
- C: Denotes a 15° contact angle, optimized for handling higher axial loads.
Common optional suffixes and their technical meanings include:
- -2Z: Shielded on both sides for contaminant protection.
- -2RS: Sealed on both sides for enhanced protection.
- (No suffix): Open bearing for high-speed applications or custom lubrication.
- P5 / P4: Precision tolerance class (ABEC-5 / ABEC-12).
- Universal Matchable (SU): Bearings are pre-ground to allow for precise preload setting when mounted in pairs.
718/6C Bearing Structural Features & Performance Benefits
The 718/6C's design delivers distinct performance advantages in critical applications:
- High Rigidity and Precision: The angular contact design and availability in high ABEC ratings (P5/P4) provide exceptional rotational accuracy and stiffness, minimizing deflection under load.
- Superior Load Capacity: The 15° contact angle enables the bearing to efficiently support significant axial loads in one direction, as well as combined loads.
- High-Speed Capability: Options for lightweight nylon or phenolic cages reduce centrifugal forces, while the option for ceramic balls further enhances high-speed performance and reduces heat generation.
- Configuration Flexibility: The Universal Matchable (SU) designation allows for easy back-to-back (DB) or face-to-face (DF) mounting to create a rigid bearing set capable of supporting bidirectional axial loads and applying a precise preload.
718/6C Bearing Typical Application Areas
This miniature precision bearing is specified in demanding sectors where size, speed, and accuracy are critical. Key applications include:
- High-Speed Spindles: CNC machining centers, PCB drilling machines, and dental handpieces.
- Precision Instruments: Optical encoders, measuring devices, and laboratory equipment.
- Robotics and Automation: Small robotic joints, servo motors, and precision gearboxes.
- Medical Devices: Surgical tools, scanners, and pumps requiring reliable, quiet operation.
