71907 ACD/HCP4ADGB
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
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71907 ACD/HCP4ADGB Bearing Product Overview & Core Advantages
The 71907 ACD/HCP4ADGB is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This universally matchable bearing features a light preload (Class B) and is supplied as a matched set of two bearings, enabling it to handle combined radial and axial loads simultaneously. Manufactured to a super-precision P4A tolerance class and utilizing ceramic balls and a phenolic cage, it delivers superior high-speed capability, reduced friction, and extended service life in precision machinery.
71907 ACD/HCP4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing series and size designation (35mm bore, 55mm OD, 20mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| D | The bearing has a higher load carrying capacity. |
| HC | Hybrid Ceramic: The rolling elements are ceramic balls. |
| P4A | The bearing is manufactured to a super-precision tolerance class (P4A), exceeding ABEC 7/ISO P4. |
| ADGB | Universal Matchable (SU) arrangement in a light preload (Class B). |
71907 ACD/HCP4ADGB Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The use of ceramic balls significantly reduces centrifugal forces, friction, and heat generation. This results in a higher limiting speed (56,000 rpm), reduced wear, and longer lubrication life compared to all-steel bearings.
Phenolic Cage: The lightweight and robust phenolic resin cage contributes to smooth operation at high speeds and offers excellent dimensional stability.
Super-Precision P4A Tolerance: The extremely tight dimensional tolerances on the bore, outside diameter, and width ensure minimal runout and superior rotational accuracy, which is critical for high-precision applications.
Universal Matchability & Preload: Supplied as a pre-matched duplex set with a light preload, these bearings are ready for installation to provide high system rigidity and precise axial and radial positioning without the need for complex adjustment.
71907 ACD/HCP4ADGB Bearing Typical Application Areas
This high-performance bearing is ideally suited for applications where high speed, high precision, and high rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy actuators.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
