7009 CD/P4ATBTA
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7009 CD/P4ATBTA Bearing Product Overview & Core Advantages
The 7009 CD/P4ATBTA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This triplex back-to-back (TBT) matched set consists of three individual bearings, preloaded to Extra light (Class A) specifications, delivering superior system stiffness and rotational accuracy. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high reliability, making it ideal for high-speed spindles and other precision machinery where minimal deflection is critical.
7009 CD/P4ATBTA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7009 | Basic bearing designation (45mm bore, 75mm OD) |
| CD | Contact angle of 15° |
| P4A | High precision tolerance class (superior to ABEC 7) |
| TBT | Triplex Back-to-Back matched arrangement |
| A | Extra light preload classification |
7009 CD/P4ATBTA Bearing Structural Features & Performance Benefits
High Rigidity & System Stiffness: The triplex back-to-back configuration creates an extremely rigid bearing system, effectively resisting moment loads and minimizing shaft deflection under operational stresses.
Optimized Load Capacity: With a 15° contact angle and three-bearing stack, this set provides excellent capacity for combined radial and axial loads. The dynamic load rating of 14,040 lbf ensures long service life under demanding conditions.
High-Speed Capability: The phenolic cage material and precision manufacturing contribute to stable operation at high rotational speeds, with a limiting speed of 46,000 rpm.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls on bore, outside diameter, and width, this bearing set guarantees exceptional running accuracy and minimal vibration.
Material Excellence: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and dimensional stability across the operating temperature range of -30°C to 110°C.
7009 CD/P4ATBTA Bearing Typical Application Areas
This precision bearing set is specifically engineered for applications requiring the highest levels of accuracy and rigidity:
- Machine Tool Spindles - High-speed machining centers, grinding spindles
- Precision Rotary Systems - Industrial robots, rotary tables
- High-Frequency Motors - Spindle motors, high-speed drives
- Medical Equipment - Dental handpieces, laboratory centrifuges
- Aerospace Components - Guidance systems, instrumentation
