71907 CE/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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71907 CE/P4ADBA Bearing Product Overview & Core Advantages
The 71907 CE/P4ADBA is a precision angular contact ball bearing designed for high-performance applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set is preloaded to Extra Light (Class A) specifications, ensuring minimal axial and radial play for superior system stability. Its primary advantage lies in its ability to handle combined loads (simultaneous radial and axial loads) efficiently, making it ideal for high-speed spindles and precision machinery where high rigidity and running accuracy are paramount.
71907 CE/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Bearing series and size designation (35mm bore, 55mm OD, 20mm width) |
| CE | Contact angle of 15°, optimized for combined load capacity |
| P4A | High precision tolerance class (superior to ABEC 7), ensuring minimal runout and vibration |
| DB | Duplex Back-to-Back arrangement for increased moment rigidity and axial stability |
| A | Extra Light preload for minimal friction while maintaining stiffness |
71907 CE/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The duplex back-to-back configuration creates a rigid bearing system that effectively resists moment loads and maintains precise shaft positioning. Combined with P4A tolerance class, this ensures exceptional running accuracy for demanding applications.
Superior Load Capacity: With a 15° contact angle and optimized internal geometry, this bearing efficiently handles combined radial and axial loads. The dynamic load rating of 2812 lbf and static load rating of 2092 lbf provide reliable performance under significant operating stresses.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at high speeds, contributing to the bearing's limiting speed of 56,000 rpm. This makes it suitable for high-speed spindle applications.
Premium Material Construction: Manufactured from chrome steel for both rings and balls, this bearing delivers high hardness, wear resistance, and long service life under demanding conditions.
71907 CE/P4ADBA Bearing Typical Application Areas
The 71907 CE/P4ADBA is specifically engineered for high-precision, high-speed applications including:
- Machine Tool Spindles - Particularly for CNC machining centers, grinding spindles, and milling applications
- High-Speed Motors - Where precision and minimal vibration are critical
- Precision Instrumentation - Medical equipment, measuring devices, and optical systems
- Aerospace Components - Guidance systems and auxiliary power units requiring high reliability
- Robotics - Joint and articulation mechanisms demanding high positional accuracy
