7012 ACDGB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7012 ACDGB/P4A Bearing Product Overview & Core Advantages
The 7012 ACDGB/P4A is a high-precision single row angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Engineered to accommodate primarily axial loads in one direction, combined with moderate radial loads, its defining features include a 25° contact angle and a P4A super-precision tolerance class. This bearing is universally matchable (SU), allowing for precise preload configuration when mounted in pairs or sets. Its compact design, featuring a phenolic cage and optimized internal geometry, makes it ideal for high-speed spindles and other precision machinery where rotational accuracy and high rigidity are paramount.
7012 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 7012 | Basic bearing series and size designation (60mm bore, 95mm OD, 18mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| DGB | Universal Matchable (SU) bearing, supplied as a Light preload (Class B) set of 3 bearings for precise axial and radial stiffness. |
| P4A | Indicates a super-precision tolerance class with running accuracy better than ABEC 7/ISO P4, ensuring minimal runout and vibration. |
7012 ACDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust internal geometry are optimized to handle significant one-direction axial loads and combined loads, providing exceptional system stiffness.
- Super-Precision Performance: Manufactured to P4A tolerance class, this bearing guarantees extremely tight dimensional and running accuracy, which is critical for applications requiring minimal vibration and high positional accuracy.
- High-Speed Capability: The lightweight phenolic resin cage ensures stable operation and reduced centrifugal forces, contributing to a high limiting speed of 35,000 rpm. This makes it suitable for demanding high-speed applications.
- Optimized for Matched Sets: As a universally matchable (SU) bearing supplied in a set of three with a light preload, it simplifies installation and ensures consistent, pre-determined performance in duplex or triplex arrangements.
7012 ACDGB/P4A Bearing Typical Application Areas
The 7012 ACDGB/P4A is ideally suited for high-performance machinery where precision and speed are non-negotiable. Key application areas include:
- Machine Tool Spindles (milling, grinding, and turning centers)
- High-Frequency Motors and Precision Spindles
- Robotic Drives and Rotary Tables
- Aerospace Positioning Systems
- Medical and Dental Equipment spindles
