7019 CD/PA9AQBTG70
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 CD/PA9AQBTG70 Bearing Product Overview & Core Advantages
The 7019 CD/PA9AQBTG70 is a precision quadruplex angular contact ball bearing designed for applications demanding exceptional stiffness and high load capacity. This matched set configuration, arranged in a Tandem Back-to-Back (QBT) arrangement, is engineered to handle complex combined loads including heavy radial and axial loads from multiple directions. Manufactured to an ultra-precise PA9A tolerance class, it delivers superior running accuracy and rotational stability, making it ideal for high-performance, high-reliability machinery.
Model Code Breakdown
- 7019: Basic series designation, indicating a bearing size with a 95mm bore, 145mm outside diameter, and 72mm width.
- C: Denotes a 15° contact angle, optimized for high axial load capacity.
- D: Indicates the bearing is supplied as a preloaded set for immediate high-rigidity performance.
- PA9A: Specifies the tolerance class, representing an extremely high level of dimensional and running accuracy.
- QBT: Defines the matched arrangement as a Quadruplex Tandem Back-to-Back set, consisting of three bearings.
- G: Specifies the internal clearance/ preload group.
- 70: A manufacturing or internal grouping code.
7019 CD/PA9AQBTG70 Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The quadruplex matched set in a Tandem Back-to-Back (QBT) arrangement provides an extremely rigid support system, capable of withstanding significant combined radial and axial loads. The 15° contact angle is specifically chosen to maximize axial load carrying ability.
Precision Engineering: Built to the stringent PA9A tolerance class, this bearing ensures minimal runout and vibration, which is critical for applications requiring high positional accuracy and smooth operation.
Optimized for High-Speed Operation: The lightweight and robust phenolic cage minimizes centrifugal forces, contributing to stable performance at the specified limiting speed of 15,000 rpm. The bearings are pre-lubricated for immediate operation within a temperature range of -30°C to 110°C.
Preloaded Design: Supplied as a preloaded set, the bearing eliminates internal clearance, providing immediate high stiffness and precise shaft positioning without the need for complex adjustment during installation.
7019 CD/PA9AQBTG70 Bearing Typical Application Areas
This high-precision, high-stiffness bearing set is ideally suited for the most demanding applications, including:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Gearboxes and Transmission Systems
- Industrial Pumps and Compressors
- Aerospace Actuation Systems
- High-Rigidity Robotic Arms and Rotary Tables
