706C
Miniature Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Performance
Materials
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706C Bearing Product Overview & Core Advantages
The 706C is a high-precision double row angular contact ball bearing engineered for applications requiring exceptional accuracy and reliability. This precision bearing is distinguished by its ability to support combined loads, simultaneously carrying significant radial loads and bidirectional axial loads. Its compact design, defined by a 6 mm bore, 17 mm outside diameter, and 6 mm width, 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 design flexibility for demanding environments.
706C Bearing Model Code Explained, Specifications & Naming Convention
The 706C model number indicates a standard metric series double row angular contact ball bearing. The available suffixes and options define its specific configuration:
- Seal Type: Available as Sealed or Open. Sealed variants offer protection against contamination.
- Preload: "Available" indicates that bearings can be supplied with a preload for enhanced stiffness and rotational accuracy.
- Matched Arrangement (SU): "Universal Matchable" allows bearings to be mounted in any combination (back-to-back, face-to-face, or tandem) without a performance penalty.
- Ball Material: Options include Steel for standard performance or Ceramic for higher speed and reduced weight.
- Cage Material: Typically Nylon or Phenolic, contributing to low friction and high-speed capability.
- ABEC Rating: Available in high-precision P5 (ABEC-5) and ultra-precision P4 (ABEC-7) grades.
706C Bearing Structural Features & Performance Benefits
The 706C's performance is a direct result of its sophisticated design:
- High Rigidity & Load Capacity: The double row design and a 15° contact angle provide superior stiffness and the ability to handle substantial combined loads from multiple directions.
- Exceptional High-Speed Performance: The lightweight polymer cage (Nylon/Phenolic) and optimized internal geometry enable remarkable speed limits, with a grease limited speed of 90,000 r/min and an oil limited speed of 155,000 r/min, categorizing it as a true high-speed bearing.
- Precision Operation: Manufactured to ABEC P5/P4 tolerance classes, this bearing ensures minimal runout and vibration for smooth, precise rotation.
- Versatile & Long-Lasting: The "Universal Matchable" feature provides application flexibility, while the optional sealing and pre-lubrication contribute to long service life with minimal maintenance.
706C Bearing Typical Application Areas
The 706C is ideally suited for high-speed, high-precision applications across various industries, including:
- High-Speed Spindles: CNC machining centers, PCB drilling machines, and grinding spindles.
- Precision Instruments: Optical encoders, medical devices, and laboratory equipment.
- Turbo Machinery: Small turbines, compressors, and high-speed blowers.
- Robotics: Joint and arm assemblies requiring compact, rigid, and precise motion control.
