7019 CD/P4ATBTA
7000 Series Super Precision Angular Contact Ball Bearings
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7019 CD/P4ATBTA Bearing Product Overview & Core Advantages
The 7019 CD/P4ATBTA is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. This triplex matched set in a back-to-back (TBT) arrangement provides superior stiffness and stability, enabling it to handle significant combined loads (radial and axial) simultaneously. Manufactured to P4A tolerance class with an extra light preload (Class A), it is engineered for high-precision, high-speed spindle systems where minimal runout and thermal stability are critical. The open design and phenolic cage contribute to its high-performance capabilities.
7019 CD/P4ATBTA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7019 | Basic bearing series designation, indicating bore diameter (95 mm), outside diameter (145 mm), and width (72 mm). |
| CD | Indicates a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| P4A | Specifies the tolerance class (P4A), denoting very high dimensional and running accuracy, superior to ABEC 7. |
| TBT | Denotes the matched arrangement as Triplex Back-to-Back, consisting of three bearings pre-configured for maximum rigidity and moment load resistance. |
| A | Signifies the preload level as Extra Light (Class A), minimizing friction and heat generation for very high-speed applications. |
7019 CD/P4ATBTA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The triplex back-to-back (TBT) arrangement creates a highly rigid bearing system, effectively resisting complex moment loads and maintaining precise shaft positioning under heavy combined loads.
Superior Load Capacity: With a radial dynamic load rating of 39,150 lbf and a static load rating of 54,000 lbf, this bearing set is built for demanding applications. The 15° contact angle provides an optimal balance for handling both radial and axial forces.
High-Speed Performance: The phenolic cage offers excellent strength-to-weight ratio and smooth operation at high speeds, supporting a limiting speed of 15,000 rpm. The open design facilitates efficient lubrication and cooling.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore and OD tolerance: -0.004mm to 0), this bearing ensures minimal vibration and high running accuracy for precision machinery.
7019 CD/P4ATBTA Bearing Typical Application Areas
This high-precision triplex angular contact bearing set is ideally suited for:
- Machine Tool Spindles (CNC machining centers, grinding spindles)
- High-Speed Spindles for precision milling and drilling
- Precision Rotary Tables and indexing heads
- Industrial Robotics and automation equipment
- Aerospace Test Rigs and precision instrumentation
