71807 CD/HCP4DGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71807 CD/HCP4DGA Bearing Product Overview & Core Advantages
The 71807 CD/HCP4DGA is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and performance. Its core advantage lies in its ability to accommodate combined loads (simultaneous radial and axial loads) with high running accuracy and rigidity. Manufactured to a P4 tolerance class, it guarantees superior dimensional and running precision. The use of a phenolic cage and ceramic balls contributes to lower friction, higher limiting speeds, and extended service life, making it an ideal choice for high-speed spindle applications and other precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71807 | Basic bearing series and size designation (35mm bore, 47mm OD, 14mm width). |
| CD | Indicates a universal matchable bearing designed for duplex pairs (DB/DF/DT arrangements). |
| HC | Signifies the use of Hybrid Ceramic components (ceramic balls with steel rings). |
| P4 | Denotes the tolerance class, corresponding to ABEC 7/ISO P4, ensuring very high precision. |
| DGA | Indicates a specific preload level (Extra light / Class A). |
71807 CD/HCP4DGA Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces centrifugal forces, lowers operating temperature, and enables higher limiting speeds. This construction also provides superior resistance to wear and a longer operational life.
- Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability and low friction at high speeds, contributing to smooth operation and reduced vibration.
- 15° Contact Angle & Universal Matchability: The 15° contact angle is optimized for high-speed applications requiring high axial rigidity. The universal matchable (SU) design allows two bearings to be paired in any configuration (back-to-back, face-to-face, or tandem) to perfectly suit the load and rigidity requirements of the application.
- Extra Light Preload (DGA): The predefined preload ensures minimal axial and radial play, resulting in high shaft positioning accuracy, increased system rigidity, and reduced noise and vibration levels.
71807 CD/HCP4DGA Bearing Typical Application Areas
This high-precision, high-speed bearing is engineered for the most demanding applications across various industries:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy servo motors.
- Medical Equipment: Dental handpieces, high-speed centrifuges, and imaging devices.
- Aerospace & Defense: Gyroscopes, navigation systems, and auxiliary power units (APUs).
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
