7005 CD/P4ADBAGMM
7000 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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Materials
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7005 CD/P4ADBAGMM Bearing Product Overview & Core Advantages
The 7005 CD/P4ADBAGMM is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This matched set features a Back-to-Back (DB) arrangement, providing high resistance to moment loads and excellent operational stability. Manufactured to P4A tolerance class, it ensures superior running accuracy, making it ideal for high-speed spindles and other precision machinery. Its extra light preload (Class A) minimizes deflection under light loads, contributing to enhanced performance and longevity.
7005 CD/P4ADBAGMM Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7005 | Basic bearing series, indicating a 25mm bore, 47mm OD, and 24mm width. |
| C | 15° contact angle, optimized for combined radial and axial loads. |
| D | Duplex bearing (two single bearings supplied as a set). |
| P4A | High precision tolerance class, exceeding ABEC 7 standards for minimal runout and vibration. |
| DB | Back-to-Back arrangement, providing high rigidity and moment load capacity. |
| A | Extra light preload for minimal friction and optimal high-speed performance. |
| GMM | Grease lubrication with a standard grease fill, suitable for the specified temperature range. |
7005 CD/P4ADBAGMM Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex DB arrangement creates a rigid bearing system that effectively resists moment loads and tilting moments. This configuration, combined with the 15° contact angle, enables the bearing to support significant combined loads (radial and axial) simultaneously.
Precision & High-Speed Performance: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing ensures smooth, quiet operation with minimal vibration. The phenolic cage offers low weight and excellent high-speed characteristics, contributing to a limiting speed of 103,000 rpm. The extra light preload further enhances high-speed capability by reducing friction and heat generation.
Material & Durability: Constructed from chrome steel for both rings and balls, the bearing provides high hardness, wear resistance, and long service life. The open seal design allows for easy re-lubrication and is suitable for applications where external sealing is provided by the housing.
7005 CD/P4ADBAGMM Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring extreme precision and rigidity.
- Precision Drives: Servo motors, high-frequency spindles, and robotics.
- Medical Equipment: Dental handpieces and small precision surgical tools.
- Aerospace Instrumentation: Gyroscopes, navigation systems, and control surface actuators.
- High-Speed Compressors & Pumps: Applications demanding reliable performance at high rotational speeds.
