S7015 CD/P4ADGB
Sealed Super Precision Angular Contact Ball Bearings
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S7015 CD/P4ADGB Bearing Product Overview & Core Advantages
The S7015 CD/P4ADGB is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As a universal matchable (SU) bearing supplied in a pre-loaded duplex set, it is engineered to handle combined loads—significant radial and axial loads in both directions—simultaneously. Its P4A tolerance class ensures exceptional running accuracy, making it ideal for spindles requiring superior rotational precision, minimal runout, and high operational reliability.
S7015 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S7015 | Bearing Series & Size | Denotes a 75mm bore, 115mm OD, 40mm width super-precision bearing. |
| C | 15° Contact Angle | Optimized for high-speed operation with a balanced load capacity. |
| D | Duplex Arrangement | Two bearings are supplied as a pre-loaded set for immediate installation. |
| P4A | Tolerance Class | Exceeds ABEC 7/ISO P4 standards, offering extremely tight dimensional and running accuracy tolerances. |
| DB | Back-to-Back Mounting | The universal match (SU) bearings are pre-configured in a back-to-back (DB) arrangement, providing high moment rigidity. |
| GB | Light Preload (Class B) | A light preload is applied to eliminate internal clearance, ensuring high system stiffness and precise shaft positioning. |
S7015 CD/P4ADGB Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The duplex back-to-back (DB) arrangement creates a robust, statically determinate bearing system. This configuration provides exceptional moment stiffness and the ability to handle combined radial and axial loads from both directions, which is critical for machine tool spindles.
Super-Precision High-Speed Performance: The 15° contact angle and phenolic resin cage (TN9 style) are engineered for low friction and high rotational stability. This, combined with the P4A precision and optimized internal geometry, allows the bearing to achieve a high limiting speed of 28,000 rpm with minimal heat generation.
Optimized for Long-Term Reliability: The bearing is sealed and pre-lubricated with high-performance grease, offering a wide operating temperature range from -30°C to 110°C. This sealed design protects against contamination and provides a maintenance-free service life in clean environments.
S7015 CD/P4ADGB Bearing Typical Application Areas
The S7015 CD/P4ADGB is the bearing of choice for high-performance applications where speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and milling spindles.
- Precision Instrumentation: High-frequency spindles for PCB drilling and precision measuring equipment.
- High-Speed Drives: Motors and spindles in the aerospace and semiconductor manufacturing industries.
