7019 ACD/P4ATBTC
7000 Series Super Precision Angular Contact Ball Bearings
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7019 ACD/P4ATBTC Bearing Product Overview & Core Advantages
The 7019 ACD/P4ATBTC is a precision angular contact ball bearing supplied as a matched triplex set in a Back-to-Back (TBT) arrangement. Engineered to the exacting P4A tolerance class, this bearing is designed for applications demanding exceptional rotational accuracy, high system rigidity, and the capacity to handle significant combined loads. Its 25° contact angle is optimized for supporting high axial loads in both directions while simultaneously carrying radial loads, making it an ideal choice for high-performance, high-reliability machinery.
7019 ACD/P4ATBTC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7019 A | Basic bearing designation with a 25° contact angle. |
| C | Designates a Moderate preload (Class C) for optimized stiffness and minimal runout. |
| D | Indicates the bearing is part of a matched set. |
| P4A | Specifies a high precision tolerance class superior to ABEC 7, ensuring extreme dimensional and running accuracy. |
| TBT | Denotes the Triplex Back-to-Back arrangement of the three bearings in the set. |
| C (in TBTC) | Reiterates the Moderate preload (Class C) applied to the entire matched set. |
7019 ACD/P4ATBTC Bearing Structural Features & Performance Benefits
Exceptional Rigidity and Load Capacity: The triplex back-to-back configuration creates an extremely rigid bearing system that can withstand heavy combined radial and axial loads, as evidenced by its high dynamic (37,125 lbf) and static (51,300 lbf) load ratings. This arrangement also provides high moment stiffness.
Optimized High-Speed Performance: The phenolic resin cage offers excellent strength-to-weight ratio and operates smoothly at high speeds, contributing to the bearing's limiting speed of 15,000 rpm. The open design and factory-applied lubrication facilitate efficient heat dissipation.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on the 95 mm bore and 145 mm outside diameter, this bearing ensures minimal vibration and precise shaft positioning for critical applications.
7019 ACD/P4ATBTC Bearing Typical Application Areas
The 7019 ACD/P4ATBTC is engineered for high-precision, high-speed machinery where maximum rigidity and accuracy are paramount. Key applications include:
- Machine Tool Spindles for milling, grinding, and turning centers
- High-frequency Precision Spindles
- High-Speed Machining Centers
- Axles and gearboxes in demanding Aerospace and Defense equipment
- Other precision rotary systems requiring a preloaded, matched bearing set
