7215 ACD/P4AQBTC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7215 ACD/P4AQBTC Bearing Product Overview & Core Advantages
The 7215 ACD/P4AQBTC is a precision quadruplex matched angular contact ball bearing designed for the most demanding applications. This high-precision P4A class bearing is pre-configured in a Quadruplex Tandem Back-to-Back (QBT) arrangement, delivering exceptional system rigidity and the ability to handle significant combined loads. Its open design, preloaded to Moderate / Class C, and optimized for high-speed operation up to 36,000 rpm, makes it an ideal choice for machine tool spindles and other high-performance machinery requiring maximum accuracy and stiffness.
7215 ACD/P4AQBTC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7215 | Basic bearing series, indicating a 75 mm bore, 130 mm OD, and 100 mm width. |
| ACD | Angular Contact design with a 25° contact angle. |
| P4A | Indicates a high-precision tolerance class for bore, outer diameter, and width. |
| QBT | Specifies the matched arrangement: Quadruplex Tandem Back-to-Back. |
| C | Denotes the Moderate preload level applied to the bearing set. |
7215 ACD/P4AQBTC Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The quadruplex QBT arrangement creates an extremely rigid bearing system, capable of withstanding heavy combined radial and axial loads from both directions. This configuration is essential for applications where minimal shaft deflection is critical.
High-Speed Capability: The combination of a lightweight, high-strength phenolic cage, a 25° contact angle, and factory-applied lubrication enables a high limiting speed of 36,000 rpm, making it suitable for high-speed spindle applications.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional control on all bearing dimensions (bore, OD, width), this set guarantees running accuracy, reduced vibration, and consistent performance.
Optimized Design: The use of chrome steel for rings and balls, along with 17 balls of 15.875 mm diameter, provides high durability and a long operational life under demanding conditions.
7215 ACD/P4AQBTC Bearing Typical Application Areas
This bearing is engineered for high-end industrial applications where precision, speed, and rigidity are paramount. Key sectors include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Articulated arms and high-accuracy positioning systems.
- High-Frequency Motors and Spindles: Where extreme rotational accuracy is required.
