S7012 ACD/P4AQBTC
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S7012 ACD/P4AQBTC Bearing Product Overview & Core Advantages
The S7012 ACD/P4AQBTC is a high-precision quadruplex angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. This matched set features a Quadruplex Tandem Back-to-Back (QBT) arrangement, providing superior stiffness and the ability to handle significant combined loads (radial and axial). With a P4A tolerance class and moderate preload (Class C), it is engineered for high-speed operation and reliable performance in the most demanding precision machinery.
S7012 ACD/P4AQBTC Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| S7012 | Basic bearing series, indicating a 60 mm bore, 95 mm OD, and 72 mm width. |
| ACD | Angular Contact Design with a 25° contact angle. |
| P4A | High precision tolerance class, exceeding ABEC 7 standards. |
| QBT | Quadruplex Tandem Back-to-Back arrangement of four matched bearings. |
| C | Indicates a moderate preload for optimal rigidity and speed performance. |
S7012 ACD/P4AQBTC Bearing Structural Features & Performance Benefits
Exceptional Rigidity and Load Capacity: The Quadruplex Tandem Back-to-Back (QBT) arrangement creates an extremely rigid bearing system, capable of withstanding heavy combined radial and axial loads from multiple directions. The 25° contact angle is optimized for high axial load carrying capacity.
High-Speed Performance: The phenolic cage ensures low friction and high strength at elevated rotational speeds, contributing to a high limiting speed of 32,500 rpm. The moderate preload (Class C) minimizes deflection while maintaining excellent high-speed characteristics.
Precision and Longevity: Manufactured to a P4A tolerance class with tight dimensional control on bore, OD, and width, this bearing ensures running accuracy and consistent performance. The sealed design retains factory-applied grease lubrication, protecting against contamination and providing long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
S7012 ACD/P4AQBTC Bearing Typical Application Areas
This high-precision quadruplex bearing set is ideally suited for applications requiring maximum rigidity and speed in a compact design:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Gearboxes
- High-Frequency Motors and Spindles
- Industrial Pumps and Compressors
- Aerospace and Defense Actuation Systems
