7019 ACE/P4AQBCA
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7019 ACE/P4AQBCA Bearing Product Overview & Core Advantages
The 7019 ACE/P4AQBCA is a super-precision angular contact ball bearing configured in a Quadruplex Back-to-Back (QBC) matched set. Engineered for the most demanding applications, this bearing set delivers exceptional rotational accuracy and system rigidity. Its primary advantage lies in its ability to handle complex combined loads—significant radial and bidirectional axial loads—simultaneously, making it ideal for high-precision, high-stability machinery requiring maximum system stiffness and minimal runout.
7019 ACE/P4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7019 | Standard Bearing Series & Size | Defines the core dimensions: 95mm bore, 145mm OD, 96mm width. |
| ACE | 25° Contact Angle, Extra Light Preload | Optimized for high-speed operation and moderate axial load capacity. |
| P4A | Tolerance Class (Super Precision) | Exceeds ABEC 7/ISO P4 standards, ensuring ultra-precise running accuracy and minimal vibration. |
| QBC | Quadruplex Back-to-Back Matched Set | Four bearings are selectively matched and preloaded as a set to provide maximum system rigidity and moment load capacity. |
7019 ACE/P4AQBCA Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The Quadruplex Back-to-Back (QBC) arrangement is the key to this bearing's performance. By mounting four bearings in a back-to-back configuration, the set creates a highly rigid support system capable of withstanding heavy combined loads and significant moment loads, which is critical for maintaining precision under operational stress.
High-Speed Capability: The combination of a 25° contact angle, Extra Light preload (Class A), and a lightweight, high-strength phenolic cage allows for a high limiting speed of 15,000 rpm. This design minimizes friction and heat generation at high rotational velocities.
Super-Precision Performance: Manufactured to P4A tolerance class, these bearings exhibit extremely tight dimensional and running accuracy. This results in superior rotational precision, reduced noise, and extended service life in precision applications.
Optimized Material Selection: The use of high-grade chrome steel for both rings and balls ensures high durability and fatigue life. The open design, while requiring external lubrication, allows for optimized cooling and custom lubrication schemes for specific operating conditions.
7019 ACE/P4AQBCA Bearing Typical Application Areas
This super-precision quadruplex bearing set is specifically designed for high-end machinery where extreme accuracy, rigidity, and speed are non-negotiable. Key application areas include:
- High-Speed Machine Tool Spindles: For CNC machining centers, grinding spindles, and milling spindles requiring maximum rigidity and runout control.
- Precision Robotic Systems: Especially in robotic arm joints and high-accuracy rotary actuators.
- Advanced Medical Equipment: Used in the spindles of high-speed dental drills and precision medical imaging devices.
- Aerospace & Defense Systems: In gyroscopes, radar platforms, and other guidance systems demanding exceptional accuracy and reliability.
