7012 ACD/P4ATBTB
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7012 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The 7012 ACD/P4ATBTB is a high-precision angular contact ball bearing configured as a triplex back-to-back (TBT) matched set. This arrangement delivers exceptional system rigidity and is engineered to handle combined radial and axial loads simultaneously. Manufactured to a P4A tolerance class with a Light (Class B) preload, it is designed for applications demanding superior rotational accuracy, high-speed capability, and long-term operational stability in demanding environments.
Model Code Breakdown
| 7012 | Basic bearing series and size code (Bore: 60 mm, OD: 95 mm, Width: 18 mm per bearing). |
| ACD | Angular Contact design with a 25° contact angle. |
| P4A | Indicates a high-precision tolerance class (superior to ABEC 7), ensuring minimal runout and vibration. |
| TBT | Specifies a Triplex Back-to-Back matched set of three bearings, optimized for maximum moment stiffness. |
7012 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The triplex back-to-back configuration creates a highly rigid bearing system capable of supporting heavy combined loads and significant moment loads. The 25° contact angle is optimized for sustaining substantial axial loads in both directions.
High-Speed Performance: The use of a lightweight, durable phenolic resin cage reduces centrifugal forces, enabling stable operation at high rotational speeds up to 39,000 rpm.
Precision & Accuracy: Manufactured to P4A precision tolerances with a controlled light preload, this bearing set guarantees minimal axial and radial runout, which is critical for applications requiring high positional accuracy.
Material & Construction: Components are made from high-grade chrome steel, providing excellent wear resistance and fatigue life. The set comes pre-lubricated for immediate use.
7012 ACD/P4ATBTB Bearing Typical Application Areas
This precision bearing set is ideally suited for high-performance applications where rigidity, speed, and accuracy are paramount. Key industries and machinery include:
- Machine Tool Spindles (e.g., high-speed milling, grinding spindles)
- Precision Gearboxes
- High-Frequency Motors and Spindles
- Aerospace Actuation Systems
- Medical and Laboratory Centrifuges
