7015 ACD/P4AQBCB
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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7015 ACD/P4AQBCB Bearing Product Overview & Core Advantages
The 7015 ACD/P4AQBCB is a high-precision, quadruplex matched set of angular contact ball bearings arranged in a back-to-back (QBC) configuration. This specialized arrangement is engineered to deliver exceptional system rigidity and handle significant combined loads (radial and axial) simultaneously. Manufactured to the exacting P4A tolerance class, it is designed for applications demanding the highest levels of rotational accuracy and operational reliability in high-speed environments. The set is pre-lubricated and features a light preload (Class B) for optimal performance right from installation.
7015 ACD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7015 | Basic bearing series and size designation. | Defines the core bearing dimensions: 75mm bore, 115mm OD, 20mm width per bearing. |
| ACD | Angular Contact, 25° Contact Angle. | Optimized for carrying substantial axial loads in one direction, in addition to radial loads. |
| P4A | High-Precision Tolerance Class. | Exceeds ABEC 7 standards, ensuring extremely tight dimensional and running accuracy for superior performance. |
| QBC | Quadruplex Back-to-Back Arrangement. | Four bearings are supplied as a universally matched set, pre-configured to provide maximum moment stiffness and stability. |
7015 ACD/P4AQBCB Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The quadruplex back-to-back (QBC) arrangement creates an exceptionally stiff bearing system capable of resisting complex moment loads. This configuration significantly increases the radial dynamic load rating (29,925 lbf) and static load rating (41,850 lbf) of the assembly compared to a single bearing.
High-Speed Precision: The combination of a phenolic resin cage, a 25° contact angle, and P4A precision allows for smooth operation at high rotational speeds (limiting speed of 28,000 rpm). The phenolic cage offers excellent strength-to-weight ratio and operates effectively with minimal lubrication.
Pre-Configured for Performance: Supplied as a universally matched set with a light preload, this bearing group ensures consistent, predictable performance, eliminates internal clearance, and simplifies the installation process, reducing the risk of assembly errors.
Material Integrity: Constructed from high-grade chrome steel for both rings and balls, ensuring long-term durability, wear resistance, and consistent performance under demanding conditions.
7015 ACD/P4AQBCB Bearing Typical Application Areas
The 7015 ACD/P4AQBCB is engineered for the most demanding high-precision machinery. Its primary applications include:
- High-Frequency Machine Tool Spindles: For milling, grinding, and turning centers where extreme rigidity and running accuracy are paramount.
- Precision Robotic Drives: Used in robotic arms and joints requiring high moment load capacity and positional accuracy.
- Aerospace & Defense Systems: In gyroscopes, radar systems, and other instrumentation requiring the highest level of precision and reliability.
- High-Speed Pumps and Compressors: Where stable operation under combined loads at high speeds is critical.
