S71915 CD/P4ADGA
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71915 CD/P4ADGA Bearing Product Overview & Core Advantages
The S71915 CD/P4ADGA is a super-precision angular contact ball bearing designed for the most demanding applications. Operating under the P4A tolerance class, it delivers exceptional rotational accuracy and running smoothness. Its core advantage lies in its ability to handle combined loads—significant radial loads alongside high thrust loads in both directions—making it ideal for high-speed spindles and other precision machinery requiring maximum rigidity and minimal runout. The extra light preload (Class A) ensures consistent performance and precise positioning under operational conditions.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S71915 | Bearing series and size designation (75mm bore, 105mm OD, 32mm width). |
| CD | Indicates a 15° contact angle and that the bearing is part of a universally matchable (SU) set. Two bearings are mounted in a back-to-back (DB) arrangement. |
| P4A | Specifies the tolerance class, denoting very high precision with enhanced running accuracy requirements. |
| DGA | Signifies that the bearing is sealed and pre-lubricated with grease. |
S71915 CD/P4ADGA Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The double-row design and 15° contact angle provide superior high rigidity and enable the bearing to support substantial combined loads (radial and bidirectional axial loads) simultaneously.
Super-Precision Performance: Manufactured to P4A tolerance class with a phenolic cage, this bearing ensures extremely low vibration and high running accuracy, which is critical for maintaining tight tolerances in precision equipment.
Optimized for High-Speed Operation: The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 28,000 rpm, making it a true high-speed bearing.
Maintenance-Free Operation: The integrated seals and factory-applied grease lubrication protect against contamination and provide long-term, maintenance-free service within the specified temperature range of -30°C to 110°C.
S71915 CD/P4ADGA Bearing Typical Application Areas
This super-precision angular contact ball bearing is engineered for high-performance applications, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Instrumentation
- High-Frequency Motors
- Medical Equipment Spindles
- Aerospace Control Systems
