705C
Miniature Angular Contact Ball Bearings
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Basic Information
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Materials
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705C Bearing Product Overview & Core Advantages
The 705C is a miniature angular contact ball bearing engineered for applications demanding high precision and extremely high rotational speeds. Its compact design (5 mm bore, 14 mm OD) makes it ideal for space-constrained assemblies. This bearing is distinguished by its ability to accommodate combined loads (radial and axial) simultaneously, offering superior running accuracy and rigidity. Available in both sealed and open variants, and with options for preload, it provides versatile solutions for critical high-speed machinery.
705C Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 705C | Basic bearing series number, indicating a metric series angular contact ball bearing with a 5mm bore. |
| Sealed / Open | Specifies the bearing's configuration. Sealed versions offer contaminant protection, while Open versions allow for custom lubrication schemes. |
| Preload | Indicates availability of a controlled internal axial load to eliminate internal clearance, enhancing system rigidity and rotational accuracy. |
| SU | Signifies Universal Matchable design, allowing bearings to be mounted in various preloaded arrangements (e.g., back-to-back, face-to-face). |
705C Bearing Structural Features & Performance Benefits
High-Speed Capability: The 705C is engineered for exceptional high-speed performance, with a grease limited speed of 83,000 r/min and an oil limited speed of 88,000 r/min. This is facilitated by lightweight cage materials like Nylon or Phenolic and optimized internal geometry.
Precision & Rigidity: Manufactured to ABEC 5/P5 and ABEC 7/P4 tolerance classes, this bearing ensures minimal runout and vibration. The 15° contact angle provides an optimal balance for handling combined loads while maintaining high rigidity.
Material & Lubrication Options: The availability of both steel and ceramic balls allows for performance tuning. Ceramic balls reduce weight and inertia for even higher speeds and offer non-conductive properties. The bearing comes pre-lubricated for immediate operation and long service life.
Load Capacity: With a dynamic load rating of 348.44 lbf and a static load rating of 116.9 lbf, it provides reliable performance in demanding applications.
705C Bearing Typical Application Areas
The 705C miniature precision bearing is ideally suited for applications where compact size, high speed, and accuracy are paramount. Key industries and equipment include:
- High-Speed Spindles for PCB drilling and precision machining
- Medical and Dental Handpieces
- High-Frequency Motors and Servo Drives
- Optical Scanners and Encoder Systems
- Instrumentation and Laboratory Equipment
