S71930 CD/P4AQBCC
Sealed Super Precision Angular Contact Ball Bearings
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Main Dimensions
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S71930 CD/P4AQBCC Bearing Product Overview & Core Advantages
The S71930 CD/P4AQBCC is a super-precision angular contact ball bearing designed for the most demanding industrial applications. Its Quadruplex Back-to-Back (QBC) matched arrangement provides exceptional system rigidity and stability, enabling it to handle complex combined loads (radial and axial) simultaneously. Manufactured to an ultra-precise P4A tolerance class, this bearing is engineered for high-speed operation, superior running accuracy, and long-term reliability in precision machinery.
S71930 CD/P4AQBCC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | High-precision bearing series |
| 1930 | Standard bore (150 mm) & outside diameter (210 mm) dimensions |
| CD | Moderate preload (Class C) |
| P4A | Ultra-high precision tolerance class, exceeding ABEC 7 |
| QBCC | Quadruplex Back-to-Back (QBC) matched set, universal mounting |
S71930 CD/P4AQBCC Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The Quadruplex Back-to-Back (QBC) configuration creates an extremely stiff bearing system, ideal for applications where minimal shaft deflection under heavy combined loads is critical. The 15° contact angle is optimized for supporting significant axial loads in both directions.
High-Speed Capability: The lightweight, durable phenolic resin cage ensures stable operation and reduced centrifugal forces at high rotational speeds, contributing to the bearing's impressive limiting speed of 11,000 rpm.
Precision and Longevity: Manufactured from high-grade chrome steel and held to P4A tolerances, this bearing guarantees exceptional running accuracy and smooth operation. The sealed design with pre-applied grease lubrication protects against contamination and ensures consistent performance within a temperature range of -30°C to 110°C.
S71930 CD/P4AQBCC Bearing Typical Application Areas
The S71930 CD/P4AQBCC is the bearing of choice for high-performance machinery requiring maximum precision and rigidity. Its primary applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications demanding the highest levels of rotational accuracy.
- High-Frequency Machining Centers: Where rapid acceleration and deceleration are required.
- Industrial Pumps and Compressors: For robust performance under demanding conditions.
