71803 CD/P4DBB
71800 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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71803 CD/P4DBB Bearing Product Overview & Core Advantages
The 71803 CD/P4DBB is a precision duplex back-to-back angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This P4 tolerance class bearing is preloaded and matched as a set, enabling it to handle combined radial and axial loads simultaneously. Its compact design and light preload (Class B) make it ideal for high-speed spindles and other precision machinery where high rigidity and minimal runout are critical.
71803 CD/P4DBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71803 | Basic bearing designation (17mm bore, 26mm OD, 10mm width). |
| C | 15° contact angle, optimized for carrying axial loads. |
| D | Duplex bearing (two bearings supplied as a set). |
| P4 | High precision tolerance class, ensuring extremely tight dimensional and running accuracy. |
| DB | Matched arrangement: Back-to-Back (DB). This configuration provides high moment rigidity and excellent stability under complex loads. |
71803 CD/P4DBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a rigid bearing system that can withstand combined loads and tilting moments, making it significantly more rigid than a single bearing. The light preload eliminates internal clearance, ensuring precise shaft positioning and smooth operation under high-speed conditions.
High-Speed Performance: The phenolic resin cage is lightweight and possesses excellent sliding properties, contributing to lower friction and enabling the bearing to achieve its high limiting speed of 103,000 rpm. The open design and factory-applied lubrication further support efficient operation at high rotational speeds.
Precision & Accuracy: Manufactured to P4 tolerance standards with chrome steel rings and balls, this bearing guarantees minimal runout and superior running accuracy, which is essential for applications like machine tool spindles.
71803 CD/P4DBB Bearing Typical Application Areas
The 71803 CD/P4DBB is engineered for high-performance applications, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Instrumentation
- High-Frequency Motors
- Robotic Arm Joints
- Medical and Dental Equipment
