7011 ACDGD/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7011 ACDGD/P4A Bearing Product Overview & Core Advantages
The 7011 ACDGD/P4A is a single-row angular contact ball bearing designed for applications demanding exceptional precision and high rigidity. Engineered to accommodate combined loads (radial and axial), its primary function is to provide robust support in high-performance systems. A key feature is its Heavy preload (Class D) and P4A super-precision tolerance, which ensure minimal runout and superior rotational accuracy. The bearing is Universal Matchable (SU), allowing for precise axial clearance control when mounted in pairs. Its compact design, combined with a high limiting speed and a 25° contact angle, makes it an ideal choice for high-speed, high-rigidity applications requiring maximum operational reliability.
7011 ACDGD/P4A Bearing Model Code Explained, Specifications & Naming Convention
- 7011: Basic designation indicating a metric, single-row angular contact ball bearing with a 55mm bore and 90mm outside diameter.
- AC: Signifies Angular Contact design, optimized for combined loads.
- D: Denotes a Heavy preload (Class D), providing high initial rigidity and minimizing deflection under load.
- GD: Indicates the bearing is Lubricated from the factory.
- P4A: Specifies the tolerance class, representing super-precision levels with extremely tight dimensional and running accuracy tolerances.
7011 ACDGD/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The combination of a 25° contact angle and a Heavy preload (Class D) delivers superior system stiffness, critical for applications like machine tool spindles. The P4A tolerance class ensures exceptional running accuracy and low vibration.
Optimized Load Capacity: The angular contact design is inherently capable of supporting significant combined radial and axial loads simultaneously. The high-grade Chrome Steel construction for rings and balls provides excellent durability and load ratings.
High-Speed Capability: The lightweight Phenolic cage reduces centrifugal forces, contributing to a high limiting speed of 34,000 rpm. This makes the bearing suitable for demanding high-speed operations.
Universal Matching: As a Universal Matchable (SU) bearing, it can be paired with another identical bearing in a back-to-back (DB) or face-to-face (DF) arrangement to create a pre-loaded set, simplifying installation and optimizing performance.
7011 ACDGD/P4A Bearing Typical Application Areas
The 7011 ACDGD/P4A is ideally suited for high-precision, high-speed machinery where rigidity and accuracy are paramount. Key applications include:
- Machine Tool Spindles (milling, grinding, turning centers)
- High-Frequency Motors and Spindles
- Precision Robotics and Automation Equipment
- Aerospace Control Systems
- Medical and Dental Equipment Drives
