71907 CBGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
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71907 CBGA/HCP4A Bearing Product Overview & Core Advantages
The 71907 CBGA/HCP4A is a single-row angular contact ball bearing engineered for ultra-high precision applications requiring exceptional rotational accuracy and speed capability. Manufactured to P4A tolerance class, this bearing delivers superior dimensional stability and running accuracy. Its core advantages include the ability to accommodate combined radial and axial loads in one direction, facilitated by a 15° contact angle. The use of a phenolic resin cage and ceramic balls enables outstanding high-speed performance and reduced rotational inertia, making it ideal for demanding, precision-driven machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing designation, indicating a high-precision, angular contact bearing series with a 35mm bore. |
| C | Specifies a 15° contact angle. |
| BGA | Indicates a universally matchable bearing designed for preloaded sets. |
| HCP4A | Denotes the tolerance class (P4A - superior precision) and material specification (HC - Hybrid Ceramic). |
71907 CBGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces friction, heat generation, and wear. This construction provides electrical insulation, higher limiting speed, and extended service life, especially in high-speed or electrically sensitive environments.
- Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability at high rotational speeds and is well-suited for the demanding conditions of high-speed spindles.
- Precision P4A Tolerance: Manufactured to ABEC 7 / ISO P4A standards, this bearing ensures minimal runout and vibration, which is critical for achieving high levels of machining accuracy and surface finish.
- Universal Matchability (SU): These bearings are universally matchable, allowing for easy assembly into preloaded duplex sets (e.g., DB, DF, DT) without selective matching, simplifying installation and inventory management.
- Pre-lubricated for Immediate Use: The bearing comes pre-lubricated, ensuring optimal performance from the first rotation and is suitable for the specified temperature range.
71907 CBGA/HCP4A Bearing Typical Application Areas
The 71907 CBGA/HCP4A is designed for high-performance applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy joints and arm assemblies.
- High-Frequency Motors and Spindles for PCB drilling and semiconductor manufacturing.
- Aerospace Gyroscopes and Instrumentation.
- Medical Equipment such as high-speed dental handpieces and surgical tools.
