7011 CDGB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7011 CDGB/P4A Bearing Product Overview & Core Advantages
The 7011 CDGB/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. As a single bearing that is Universal Matchable (SU), it enables simplified assembly into precisely preloaded pairs, offering outstanding operational reliability. Its key advantages include superior high-speed capability with a limiting speed of 34,000 rpm, excellent high rigidity due to its design and P4A tolerance class, and the ability to accommodate combined loads efficiently with a 15° contact angle. The open design with phenolic cage and pre-lubrication ensures optimal performance in a wide temperature range.
7011 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7011 | Basic bearing designation indicating a metric series angular contact ball bearing with a 55mm bore, 90mm OD, and 18mm width. |
| C | Specifies a 15° contact angle, optimized for high-speed applications and moderate axial load capacity. |
| DGB | Indicates a Universal Matchable (SU) bearing. Two such bearings can be mounted in a back-to-back (DB) arrangement to form a preloaded set, providing high rigidity and precise shaft positioning. |
| P4A | Denotes an ultra-precision tolerance class, superior to ABEC 7. This ensures extremely tight dimensional and running accuracy for applications requiring minimal runout and vibration. |
7011 CDGB/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: Manufactured to P4A tolerance class with a Light / Class B preload, this bearing delivers exceptional rotational accuracy and system stiffness, minimizing deflection under load.
Optimized for Combined Loads: The 15° contact angle is engineered to handle significant combined radial and axial loads simultaneously, making it ideal for complex loading conditions.
Superior High-Speed Performance: The lightweight phenolic resin cage and optimized internal geometry contribute to low friction and a high limiting speed of 34,000 rpm, enabling smooth operation in demanding high-speed spindles.
Universal Matching Design: The Universal Matchable (SU) feature allows for simplified installation of two bearings in a preloaded arrangement (typically back-to-back), eliminating the need for selective mounting and ensuring consistent, high-performance operation.
Durable Material Construction: Made from high-grade chrome steel for both rings and balls, the bearing offers high fatigue life and wear resistance.
7011 CDGB/P4A Bearing Typical Application Areas
The 7011 CDGB/P4A is ideally suited for high-precision, high-speed machinery where accuracy and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors and Spindles: Where minimal runout and high rotational speeds are required.
- Medical and Dental Equipment: High-speed handpieces and diagnostic scanners.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
