71900 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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71900 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The 71900 ACDGA/HCP4A is a single-row angular contact ball bearing engineered for ultra-high precision and performance. Its defining characteristic is the 25° contact angle and P4A super-precision tolerance class, making it ideal for applications demanding exceptional rotational accuracy and rigidity. The bearing is universally matchable (SU), allowing for precise preload control when mounted in sets of three. Its compact design, with a 10 mm bore and 6 mm width, provides a high-performance solution in a minimal space, while the ceramic balls and phenolic cage contribute to superior high-speed capabilities and reduced weight.
71900 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| 71900 | Basic series code for a miniature, ultra-light series bearing. |
| AC | Angular Contact design, optimized for combined loads. |
| D | Light preload (often designated as 'A' in other series). |
| GA | Universal Matchable bearing. Can be paired in any combination to achieve a specific preload. |
| /HC | Hybrid Ceramic. Signifies the use of ceramic (silicon nitride) balls. |
| P4A | Super Precision Tolerance Class, exceeding ABEC 7/ISO P4 standards for runout and dimensional accuracy. |
71900 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, providing the stable and accurate rotation required for high-precision spindles. The 25° contact angle offers an optimal balance between radial and axial load capacity.
Enhanced High-Speed Performance: The combination of ceramic balls and a phenolic resin cage is critical for high-speed operation. Ceramic balls are lighter, reducing centrifugal force, and the phenolic cage offers excellent strength-to-weight ratio and smooth operation at the limiting speed of 165,000 rpm.
Superior Load Capacity: Despite its compact bearing dimensions (10x22x6 mm), it delivers a dynamic load rating of 544 lbf and a static load rating of 238 lbf, enabling it to handle significant combined loads.
Universal Matching for Optimal Preload: As a Universal Matchable (SU) bearing, it can be supplied in sets of three. This allows engineers to achieve a precise, extra-light preload in the application, maximizing system stiffness and lifespan without manual adjustment.
71900 ACDGA/HCP4A Bearing Typical Application Areas
This high-precision, high-speed angular contact ball bearing is specifically designed for demanding applications, including:
- High-Frequency Spindles: PCB drilling and milling spindles.
- Precision Instrumentation: Optical encoders, gyroscopes, and medical devices.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
- Dental Handpieces: High-speed drills requiring minimal vibration.
