71918 ACD/P4ADGC
71900 Series Super Precision Angular Contact Ball Bearings
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71918 ACD/P4ADGC Bearing Product Overview & Core Advantages
The 71918 ACD/P4ADGC is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. Engineered to a P4A tolerance class, it offers superior running accuracy. Its key advantage lies in its Universal Matchable (SU) design, allowing two bearings to be universally paired for optimal performance in preloaded arrangements. This configuration provides high rigidity and the ability to support combined loads (radial and axial) simultaneously, making it ideal for high-speed, high-precision spindles and machinery.
71918 ACD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
- 71918: Basic model number indicating a light series, 90mm bore angular contact bearing.
- AC: Angular Contact design with a 25° contact angle.
- D: Signifies a Moderate Preload (Class C).
- P4A: Denotes a very high tolerance class for superior dimensional and running accuracy.
- DGC: Indicates the bearing is Lubricated and part of a Universal Matchable (SU) set.
71918 ACD/P4ADGC Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The angular contact design with a 25° contact angle and Universal Matchable (SU) pairing enables the bearing to handle significant combined radial and axial loads. The specified Moderate Preload (Class C) eliminates internal clearance, enhancing system stiffness and rotational accuracy.
High-Speed Performance: The lightweight Phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 15,000 rpm. The optimized internal geometry further supports stable operation at high velocities.
Precision Engineering: Manufactured to P4A tolerance standards with tight dimensional controls on the bore diameter, outside diameter, and width, this bearing ensures minimal runout and vibration for ultra-precise applications.
Durability: Constructed from Chrome Steel for both rings and balls, the bearing offers high wear resistance and a long operational life within a temperature range of -30°C to 110°C.
71918 ACD/P4ADGC Bearing Typical Application Areas
This precision bearing is ideally suited for applications where high speed, rigidity, and accuracy are paramount. Key industries and equipment include:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Equipment
- Industrial Pumps and Compressors
- Aerospace Control Systems
