7011 CDGA/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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7011 CDGA/P4A Bearing Product Overview & Core Advantages
The 7011 CDGA/P4A is a single row angular contact ball bearing engineered for ultra-high precision applications. Positioned in the P4A tolerance class, it delivers exceptional running accuracy and dimensional stability. Its core advantage lies in its ability to support high combined loads (radial and axial) in one direction, making it ideal for demanding, high-speed spindles and precision machinery where rigidity and minimal runout are critical. The Universal Matchable (SU) designation allows for precise preload control when mounted in pairs, further enhancing system performance.
7011 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
- 7011: Basic designation denoting a metric, single row angular contact ball bearing with a 55mm bore, 90mm OD, and 18mm width.
- C: Signifies a 15° contact angle, optimized for high-speed operation with moderate axial load capacity.
- D: Indicates the bearing is supplied as part of a universally matchable pair (SU).
- GA: Denotes a specific preload level – Extra Light (Class A).
- P4A: Specifies the tolerance class, exceeding ABEC 7/ISO Class 4 standards for superior dimensional and running accuracy.
7011 CDGA/P4A Bearing Structural Features & Performance Benefits
High Precision & Rigidity: Manufactured to P4A tolerance standards with an open seal design, this bearing ensures minimal vibration and exceptional rotational accuracy. The phenolic resin cage provides high strength with low weight, contributing to smooth operation at high speeds.
Optimized Load Capacity: The 15° contact angle is engineered to efficiently handle combined radial and axial loads simultaneously. The high-grade chrome steel construction for both rings and balls ensures high dynamic (8932 lbf) and static (7312 lbf) load ratings.
Superior High-Speed Performance: The combination of the lightweight phenolic cage, precision-ground components, and optimized internal geometry enables a high limiting speed of 34,000 rpm. The bearing is pre-lubricated for immediate operation within a temperature range of -30°C to 110°C.
7011 CDGA/P4A Bearing Typical Application Areas
The 7011 CDGA/P4A is the preferred choice for high-performance applications requiring supreme precision and speed, including:
- Machine Tool Spindles (CNC machining centers, grinding spindles)
- High-Frequency Motors
- Precision Instrumentation
- Robotic Drives
- Dental and Medical Handpieces
