S7007 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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S7007 CDGA/HCP4A Bearing Product Overview & Core Advantages
The S7007 CDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and speed. Engineered as a universally matchable single bearing (SU designation), it can be precisely paired with a second identical bearing to form a preloaded duplex set, delivering superior system rigidity. Its core advantages include the ability to accommodate combined radial and axial loads simultaneously, facilitated by a 15° contact angle. The use of ceramic balls and a phenolic cage contributes to lower friction, higher limiting speeds, and extended service life, making it an ideal choice for high-speed spindle applications.
S7007 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7007 | Basic bearing series and size designation (35mm bore, 62mm OD, 14mm width). |
| C | Specifies a 15° contact angle. |
| DG | Indicates the bearing is Universal Matchable (SU), allowing for controlled preload when mounted face-to-face or back-to-back with another bearing. |
| A | Denotes an Extra Light preload class, minimizing friction and heat generation at high speeds. |
| HCP4A | Defines the material and precision: H (Hybrid - Ceramic Balls), C (Phenolic Cage), and P4A (Super Precision Tolerance Class). |
S7007 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and provides electrical insulation, enabling higher limiting speeds (41,000 rpm) and longer service life.
- Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability and low friction at high rotational speeds, contributing to smooth operation and reduced vibration.
- Super-Precision P4A Tolerance: Manufactured to ABEC 7 / P4A precision class with extremely tight bore, OD, and width tolerances, this bearing ensures exceptional running accuracy, minimal runout, and superior system performance.
- Universal Matching & Preload: The Universal Matchable (SU) design allows for simplified assembly of preloaded pairs, delivering high system rigidity, precise shaft positioning, and improved dynamic response.
- Sealed & Pre-Lubricated: The sealed design with factory-applied grease lubrication protects against contamination and is suitable for the specified temperature range, offering a maintenance-free solution.
S7007 CDGA/HCP4A Bearing Typical Application Areas
The S7007 CDGA/HCP4A is engineered for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling spindles.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units (APUs).
- High-Speed Motors and Drives: Servo motors, spindle motors, and high-frequency electric motors.
- Medical and Laboratory Equipment: Dental handpieces, centrifuges, and precision instrumentation.
