S7012 ACD/P4AQBCC
Sealed Super Precision Angular Contact Ball Bearings
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S7012 ACD/P4AQBCC Bearing Product Overview & Core Advantages
The S7012 ACD/P4AQBCC is a metric system, P4A super-precision double row angular contact ball bearing designed for the most demanding applications. Engineered as a Quadruplex Back-to-Back (QBC) matched set, this configuration delivers exceptional system rigidity and stability. Its primary advantage lies in its ability to support combined loads—significant radial and bidirectional axial loads—simultaneously, making it ideal for high-precision, high-reliability machinery requiring maximum stiffness and running accuracy.
S7012 ACD/P4AQBCC Bearing Model Code Explained, Specifications & Naming Convention
The model number S7012 ACD/P4AQBCC provides a detailed technical specification:
- S70: Denotes a series of high-precision angular contact ball bearings.
- 12: Indicates a bore diameter of 60 mm (12 x 5 = 60 mm).
- AC: Signifies Angular Contact design with a 25° contact angle.
- D: Represents a specific internal design and moderate preload (Class C).
- P4A: Specifies a super-precision tolerance class, exceeding ABEC 7/ISO P4 standards for superior running accuracy.
- QBCC: Defines the bearing as part of a Quadruplex Back-to-Back (QBC) matched set of 4 bearings, pre-configured for optimal performance.
S7012 ACD/P4AQBCC Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The Quadruplex Back-to-Back (QBC) arrangement creates an extremely rigid bearing system, effectively resisting complex moment loads. The double row design and 25° contact angle provide a high radial dynamic load rating of 22,725 lbf and a radial static load rating of 29,700 lbf, enabling reliable operation under heavy combined loads.
High-Speed Capability: The use of a lightweight, high-strength phenolic cage reduces centrifugal forces, contributing to a high limiting speed of 32,500 rpm. This makes the bearing suitable for high-speed spindle applications.
Precision and Longevity: Manufactured to P4A tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width, this bearing ensures minimal vibration and high positional accuracy. The sealed design and grease lubrication protect against contamination and provide long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
S7012 ACD/P4AQBCC Bearing Typical Application Areas
The S7012 ACD/P4AQBCC is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Robotic arm joints and high-accuracy actuators.
- High-Frequency Motors and Spindles: Motors for PCB drilling and dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and navigation equipment.
