707 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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707 CD/HCP4A Bearing Product Overview & Core Advantages
The 707 CD/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and high-speed performance. Its defining feature is the 15° contact angle, optimized to handle significant axial loads in one direction while supporting radial loads. Manufactured to the stringent P4 (ABEC-7) tolerance class, this bearing delivers exceptional running accuracy and rotational stability. The combination of a ceramic ball and phenolic cage contributes to lower friction, reduced weight, and superior performance at the limiting speed of 190,000 rpm, making it an ideal choice for high-velocity spindles and precision machinery.
707 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 707 | Bearing Series/Size Designation | Defines the core dimensions: 7mm bore, 19mm OD, 6mm width. |
| CD | Contact Angle & Design | Indicates a 15° contact angle, optimized for combined loads. |
| HC | Hybrid Ceramic | Signifies the use of ceramic balls for reduced density, lower friction, and higher speed capability. |
| P4A | Precision Class & Preload | Denotes a P4 (ABEC-7) tolerance and the availability of preload for enhanced rigidity and accuracy. |
707 CD/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The use of silicon nitride (Si3N4) ceramic balls with chrome steel rings results in a 60% reduction in ball density compared to all-steel designs. This drastically lowers centrifugal forces, enabling the bearing to achieve its exceptional limiting speed and reducing operating temperature.
Phenolic Resin Cage: The lightweight and robust phenolic cage provides excellent dimensional stability and guidance at high speeds, contributing to smooth operation and long service life.
High-Precision & Preload: Manufactured to P4 tolerance, this bearing ensures minimal runout and vibration. The availability of preload options allows for a rigid bearing setup, critical for applications requiring high system stiffness and precise shaft positioning.
Optimized Load Capacity: The 15° contact angle is engineered to efficiently support combined (radial and axial) loads, with a dynamic load rating of 565 lbf and a static load rating of 220 lbf.
707 CD/HCP4A Bearing Typical Application Areas
The 707 CD/HCP4A is specifically designed for high-performance applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- High-Speed Machine Tool Spindles: For CNC milling, grinding, and drilling centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense Systems: Gyroscopes, navigation instruments, and auxiliary power units.
- Semiconductor Manufacturing Equipment: Wafer handling robots and precision stages.
