71801 CD/P4DBB
71800 Series Super Precision Angular Contact Ball Bearings
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71801 CD/P4DBB Bearing Product Overview & Core Advantages
The 71801 CD/P4DBB is a precision duplex pair of angular contact ball bearings designed for applications demanding exceptional rotational accuracy and rigidity. This matched Back-to-Back (DB) arrangement is preloaded to Light / Class B standards, providing outstanding operational stability and resistance to moment loads. Its compact design, featuring a 12 mm bore and 21 mm outside diameter, makes it ideal for high-speed spindles and other precision machinery where space is limited and performance is critical.
71801 CD/P4DBB Bearing Model Code Explained, Specifications & Naming Convention
- 71801: Basic bearing designation indicating a metric, light series angular contact ball bearing with a 12mm bore and 21mm outside diameter.
- C: Denotes a 15° contact angle, optimized for high-speed operation and combined loads.
- D: Indicates the bearing is part of a duplex pair.
- P4: Specifies a high-precision tolerance class, ensuring extremely tight dimensional and running accuracy.
- DB: Stands for Duplex Back-to-Back mounting. This arrangement increases rigidity and effectively handles combined radial and axial loads from both directions.
71801 CD/P4DBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back configuration creates a highly rigid bearing system that can withstand significant combined loads, including moment loads, making it superior to single bearings in challenging applications.
Precision & High-Speed Performance: Manufactured to P4 tolerance class, this bearing guarantees minimal runout and smooth operation. The 15° contact angle and phenolic resin cage contribute to excellent high-speed capabilities, with a limiting speed of 110,000 rpm.
Optimized Internal Geometry: With 14 precision balls and a carefully calculated contact angle, the bearing delivers high dynamic and static load ratings (760 lbf and 531 lbf respectively) for its compact size.
Pre-lubricated & Ready-to-Use: The bearing comes lubricated from the factory, simplifying installation and ensuring immediate, reliable performance.
71801 CD/P4DBB Bearing Typical Application Areas
The 71801 CD/P4DBB is engineered for high-performance applications where precision and speed are paramount. Its primary uses include:
- High-Frequency Spindles for PCB drilling and precision machining
- Precision Grinding Spindles
- High-Speed Machine Tool Applications
- Instrumentation and Medical Equipment requiring ultra-precise rotation
- Robotic Arm Joints and Precision Gearboxes
