7011 CD/P4ADBAGMM
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7011 CD/P4ADBAGMM Bearing Product Overview & Core Advantages
The 7011 CD/P4ADBAGMM is a precision duplex pair of angular contact ball bearings in a Back-to-Back (DB) arrangement. This configuration is engineered for applications requiring exceptional rotational accuracy and the ability to withstand combined loads (radial and axial loads from both directions simultaneously). Manufactured to the stringent P4A tolerance class, it delivers superior running precision and high system rigidity. The pre-loaded Extra light (Class A) duplex set ensures minimal axial and radial runout, making it ideal for high-speed, high-precision spindles and other demanding machinery.
7011 CD/P4ADBAGMM Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7011 | Basic bearing series, indicating a 55mm bore, 90mm OD, and 36mm width. |
| C | 15° contact angle, optimized for carrying significant axial loads. |
| D | Indicates the bearing is part of a duplex pair. |
| P4A | High-Precision Tolerance Class, exceeding ABEC 7/ISO P4 standards for dimensional and running accuracy. |
| DB | Back-to-Back Arrangement. This mounting provides high moment rigidity and excellent stability under complex loads. |
| A | Specifies the Extra light preload (Class A) on the matched set. |
| GMM | Indicates the bearing is grease lubricated with a specific, high-performance grease suitable for the stated temperature range. |
7011 CD/P4ADBAGMM Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex Back-to-Back (DB) arrangement creates a wide, stable support system that significantly increases the assembly's resistance to moment loads and tilting moments. This setup provides high running accuracy and is capable of supporting combined radial and bidirectional axial loads effectively.
High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces and reduces friction, contributing to the high limiting speed of 34,000 rpm. The 15° contact angle is a balanced design for both high-speed operation and axial load capacity.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on the bore, outside diameter, and width. This guarantees precise shaft and housing fits, reduced vibration, and superior performance in precision applications.
Material & Lubrication: Components are made from high-carbon chrome steel for durability and long service life. The bearings are pre-lubricated with grease, making them ready for immediate installation and use.
7011 CD/P4ADBAGMM Bearing Typical Application Areas
The 7011 CD/P4ADBAGMM is designed for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for CNC applications.
- Robotics: High-accuracy joints and rotary axes.
- Medical Equipment: Dental handpieces and small precision instruments.
