71909 CD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71909 CD/P4ADGA Bearing Product Overview & Core Advantages
The 71909 CD/P4ADGA is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and reliability. This metric bearing features a universal matchable (SU) design, allowing two bearings to be paired in a back-to-back (DB) or face-to-face (DF) arrangement to optimize performance. Its extra light preload (Class A) ensures minimal deflection under operational stresses, making it ideal for high-speed spindles and precision machinery. The bearing is pre-lubricated for immediate use and operates efficiently within a temperature range of -30°C to 110°C.
71909 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71909 | Basic bearing designation indicating size series (719) and bore diameter (09×5=45mm) |
| CD | Contact angle designation (15° nominal contact angle) |
| P4A | High precision tolerance class with enhanced dimensional and running accuracy |
| DGA | Universal matchable bearing designation for precise bearing arrangements |
71909 CD/P4ADGA Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4A tolerance class, this bearing delivers exceptional dimensional stability and running accuracy for high-precision applications.
Optimized Contact Design: The 15° contact angle provides excellent performance for combined radial and axial loads, while the extra light preload ensures minimal friction and heat generation.
High-Speed Capability: The phenolic cage and optimized internal geometry enable limiting speeds up to 41,000 rpm, making it suitable for demanding high-speed applications.
Superior Material Quality: Constructed from chrome steel for both rings and balls, ensuring high durability and consistent performance under heavy dynamic and static loads (4770 lbf dynamic / 4275 lbf static).
71909 CD/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles
- Precision Instrumentation: Measuring equipment and optical devices
- High-Speed Motors: Industrial motors and servo drives
- Aerospace Components: Guidance systems and aircraft instrumentation
- Medical Equipment: Dental handpieces and surgical tools
- Robotics: Precision joints and positioning systems
