7012 ACD/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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7012 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 7012 ACD/P4ADBA is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set is preloaded to Extra Light (Class A) specifications, ensuring minimal axial and radial runout for superior performance. Its primary advantage lies in its ability to handle combined loads—significant radial and axial loads in both directions—simultaneously, making it ideal for high-precision, high-rigidity systems. Manufactured to the exacting P4A tolerance class, this bearing guarantees outstanding dimensional stability and operational consistency.
7012 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7012 | Basic bearing series designation, indicating a 60mm bore, 95mm OD, and 36mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a Duplex Back-to-Back (DB) matched pair arrangement. |
| P4A | Specifies a high-precision tolerance class exceeding ABEC 7 standards, with enhanced running accuracy. |
| DB | Confirms the Back-to-Back mounting of the two bearings in the set. |
| A | Denotes the specific Extra Light preload applied to the matched set. |
7012 ACD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, providing exceptional operational stability.
- Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 14,040 lbf, this bearing is engineered to handle significant combined radial and axial loads from both directions simultaneously.
- Optimized High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces and reduces friction, contributing to a high limiting speed of 39,000 rpm. The bearing is supplied lubricated for immediate operation.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on the bore, outside diameter, and width, ensuring precise fitment and minimal vibration in high-speed spindles.
- Durable Construction: Components made from chrome steel provide high hardness and wear resistance, ensuring a long service life under demanding conditions.
7012 ACD/P4ADBA Bearing Typical Application Areas
This high-precision, preloaded bearing set is specifically designed for applications where maximum rigidity and running accuracy are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for CNC machining.
- Industrial Pumps & Compressors: For applications requiring precise axial location and high-speed operation.
- Robotics: High-accuracy joints and rotary actuators.
