71800 CD/P4DBA
71800 Series Super Precision Angular Contact Ball Bearings
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71800 CD/P4DBA Bearing Product Overview & Core Advantages
The 71800 CD/P4DBA is a metric duplex angular contact ball bearing designed for applications demanding high precision and exceptional rigidity. This matched pair in a back-to-back (DB) arrangement is preloaded to Extra light / Class A standards, providing superior axial and radial stability. Its primary advantage lies in its ability to handle combined loads—simultaneous radial and axial forces—with high running accuracy, making it ideal for high-speed spindles and precision machinery where minimal deflection is critical.
71800 CD/P4DBA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71800 CD/P4DBA provides detailed technical specifications:
- 71800: Basic bearing series, indicating a metric, ultra-light section bearing with a 10mm bore.
- C: Denotes a 15° contact angle, optimized for high-speed applications with significant axial loads.
- D: Indicates the bearing is part of a Duplex (matched pair) set.
- P4: Specifies a high-precision tolerance class (equivalent to ABEC 7), ensuring extremely tight dimensional and running accuracy.
- DB: Defines the Duplex Back-to-Back mounting arrangement, which increases moment rigidity and enhances operational stability.
- A: Specifies the Extra light preload level, minimizing friction and heat generation for optimal high-speed performance.
71800 CD/P4DBA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, crucial for maintaining precision under combined loads.
Optimized for High Speeds: Featuring a phenolic resin cage, this bearing is engineered for high-speed operation (limiting speed of 95,000 rpm). The lightweight cage, combined with the 15° contact angle and extra light preload, reduces centrifugal forces and friction, enabling smooth operation at extreme rotational velocities.
Superior Precision: Manufactured to P4 tolerance class, this bearing guarantees minimal runout and vibration, which is essential for applications requiring the highest levels of accuracy and surface finish.
Robust Load Capacity: The angular contact design and duplex pairing provide a high dynamic and static load rating (691 lbf and 441 lbf respectively), ensuring reliable performance under demanding operating conditions.
71800 CD/P4DBA Bearing Typical Application Areas
The 71800 CD/P4DBA is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- High-Frequency Spindles for PCB drilling and precision machining centers
- High-Speed Machine Tool Spindles for grinding, milling, and turning
- Precision Instrumentation and measuring equipment
- Dental Handpieces and medical drill systems
- Turbochargers and other high-speed rotating assemblies
