71913 ACB/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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71913 ACB/HCP4ADGA Bearing Product Overview & Core Advantages
The 71913 ACB/HCP4ADGA is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As a universal matchable (SU) bearing supplied in a pre-set duplex pair, it excels at handling combined radial and axial loads simultaneously. Its defining features include an Extra Light (A) preload, a P4A tolerance class for exceptional running accuracy, and ceramic balls that significantly enhance high-speed performance and service life. This configuration offers a compact, ready-to-install solution for spindles requiring maximum precision and reliability.
Model Code Breakdown
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71913 | Bearing series and size designation | Indicates a 65mm bore, 90mm OD, 26mm width super-precision bearing. |
| ACB | Angular Contact, 25° contact angle, Universal Matchable | Optimized for combined loads; bearings can be mounted in any combination (Back-to-Back, Face-to-Face, Tandem). |
| HC | Hybrid Ceramic | Features ceramic balls for lower density, reduced centrifugal force, and higher limiting speed. |
| P4A | Tolerance Class | Exceeds ABEC 7/ISO P4 standards, ensuring ultra-precise running accuracy and minimal runout. |
| DGA | Duplex pair, Ground for preload "A", Universal match | Supplied as a pre-ground duplex set with Extra Light preload for immediate high-performance operation. |
71913 ACB/HCP4ADGA Bearing Structural Features & Performance Benefits
- Super-Precision & High Rigidity: Manufactured to P4A tolerance class and paired with an Extra Light preload, this bearing provides exceptional rotational accuracy and system stiffness, critical for minimizing deflection under load.
- Enhanced High-Speed Capability: The combination of hybrid ceramic balls and a lightweight phenolic resin cage reduces centrifugal forces and friction, enabling a high limiting speed of 36,000 rpm. This makes it ideal for very high-speed spindle applications.
- Superior Load Capacity: The 25° contact angle and duplex pair configuration are engineered to handle significant combined radial and axial loads from both directions, providing stable and reliable support.
- Universal Matchability (SU): This feature allows for flexible mounting arrangements (DB, DF, DT) without a loss in preload or performance, simplifying system design and inventory management.
71913 ACB/HCP4ADGA Bearing Typical Application Areas
The 71913 ACB/HCP4ADGA is specified for high-performance machinery where precision, speed, and rigidity are paramount. Key industries and equipment include:
- High-Frequency CNC Spindles for milling, grinding, and drilling
- Precision Machine Tool main shafts and ball screws
- High-Speed Robotics and automation arms
- Aerospace auxiliary systems and instrumentation
- Medical and dental drill handpieces
