718/5C
Miniature Angular Contact Ball Bearings
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Part No.
Part No.
718/5C
Basic Information
System of measurement
Metric
ABEC rating
P5(ABEC-5),P4(ABEC-10)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
5 mm
Outside diameter
11 mm
Width
5 mm
Contact angle
15 °
Performance
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Preload
Available
Materials
Ball material
Steel,Ceramic
Cage material
Nylon,Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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718/5C Bearing Product Overview & Core Advantages
The 718/5C is a miniature precision angular contact ball bearing designed for applications requiring exceptional accuracy and reliability. This high-speed bearing features a 15° contact angle, enabling it to handle combined loads—significant radial loads alongside substantial axial loads in one direction. Its compact design, with a 5mm bore and 11mm outside diameter, makes it ideal for space-constrained, high-performance assemblies. Available in both sealed and open variants, and with options for steel or ceramic balls, it offers versatility for demanding precision engineering applications.
718/5C Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 718 | Series designation for miniature, high-precision angular contact ball bearings. |
| 5 | Bore diameter code (5 mm). |
| C | Designates a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| (Options: Sealed/Open) | Indicates availability with seals for contamination protection or open for custom lubrication. |
| (Options: P5/P4) | Specifies ABEC rating (P5/ABEC-5 or P4/ABEC-10), defining the level of precision and running accuracy. |
718/5C Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to ABEC P5/P4 tolerance classes, this bearing ensures minimal runout and vibration, providing stable and precise rotational performance essential for sensitive equipment.
- Superior Load Capacity: The 15° contact angle is engineered to support significant combined loads, offering excellent performance where radial and single-direction axial loads are present simultaneously.
- Optimized High-Speed Performance: The use of lightweight nylon or phenolic cages reduces centrifugal forces, enabling higher limiting speeds and smoother operation. The option for ceramic balls further enhances speed capability and reduces friction.
- Versatile and Configurable: As a Universal Matchable (SU) bearing, the 718/5C can be mounted in pairs (back-to-back, face-to-face, or tandem) to adjust preload and stiffness, increasing application flexibility and system rigidity.
718/5C Bearing Typical Application Areas
This miniature precision bearing is critical in applications where space, speed, and accuracy are paramount. Key industries and equipment include:
- High-Speed Spindles for PCB drilling and precision machining
- Medical and Dental Handpieces
- Optical Encoders and Precision Instruments
- Small Motors and Robotics for joint and drive mechanisms
- Aerospace Guidance Systems
