7015 ACD/P4ADT
7000 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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7015 ACD/P4ADT Bearing Product Overview & Core Advantages
The 7015 ACD/P4ADT is a precision angular contact ball bearing supplied as a matched duplex tandem (DT) set to a P4A tolerance class. This configuration is engineered for applications requiring exceptional high rigidity and the capacity to handle significant axial loads in a single direction. The tandem arrangement effectively doubles the axial load capacity compared to a single bearing, making it ideal for high-precision spindles and other demanding machinery. The bearings are pre-lubricated and feature an open design, optimized for controlled lubrication systems in high-performance environments.
7015 ACD/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
- 7015: Basic series designation; 75 mm bore, 115 mm OD, 40 mm width.
- A: Denotes a 30° contact angle (Note: Specification sheet indicates 25°; A-series is commonly 30°. Please verify application requirements).
- C: Indicates the bearing has a universal match design for specific duplex arrangements.
- D: Signifies the bearing is one of a pair in a Duplex set.
- P4A: The tolerance class, specifying extremely tight dimensional and running accuracy (superior to ABEC 7 / ISO P4).
- DT: The Duplex Tandem arrangement, where two bearings are mounted together to share axial loads in the same direction.
7015 ACD/P4ADT Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex tandem arrangement provides superior stiffness and dramatically increases the axial load-carrying capability, making it suitable for resisting heavy thrust loads. The 25° contact angle is optimized for a high thrust-to-radial load ratio.
Precision Performance: Manufactured to a P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for applications like high-speed machining spindles.
Optimized for High-Speed Operation: The lightweight phenolic resin cage ensures stable operation and lower friction at high rotational speeds, contributing to the bearing's limiting speed of 28,000 rpm.
Material & Construction: Made from high-grade chrome steel for both rings and balls, the bearing offers excellent durability and fatigue resistance. The open seal type allows for efficient lubrication management in complex systems.
7015 ACD/P4ADT Bearing Typical Application Areas
This precision tandem bearing set is specifically designed for high-performance applications, including:
- Machine Tool Spindles: Especially for milling, grinding, and turning centers requiring high rigidity and precision.
- High-Speed Spindles: Used in PCB drilling, precision engraving, and other high-RPM machinery.
- Pumps and Compressors: Where precise shaft positioning and handling of significant axial loads are critical.
- Precision Rotary Axes: In industrial robots, indexing tables, and other automated equipment.
