7205 CD/P4ADBG27GMM
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7205 CD/P4ADBG27GMM Bearing Product Overview & Core Advantages
The 7205 CD/P4ADBG27GMM is a precision angular contact ball bearing supplied as a matched duplex pair in a Back-to-Back (DB) arrangement. Engineered for exceptional performance, this bearing is designed to handle combined loads—simultaneously supporting significant radial loads and axial loads from both directions. Its P4A super-precision tolerance and 15° contact angle deliver superior running accuracy and high rigidity, making it ideal for demanding applications requiring high rotational speeds and operational stability. The preloaded DB configuration ensures minimal axial and radial runout, providing outstanding system stiffness.
7205 CD/P4ADBG27GMM Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7205 | Basic bearing series; 25 mm bore, 52 mm OD, 30 mm width. |
| C | 15° nominal contact angle. |
| D | Duplex bearing set. |
| P4A | Super-precision tolerance class (exceeds ABEC 7/ISO P4). |
| DB | Back-to-Back mounting arrangement. |
| G27GMM | Preload code and internal clearance specification for the matched set. |
7205 CD/P4ADBG27GMM Bearing Structural Features & Performance Benefits
- High Rigidity & System Stability: The duplex Back-to-Back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and provides exceptional operational stability.
- Superior Load Capacity: The angular contact design with a 15° contact angle is optimized to carry combined (radial and axial) loads efficiently in both directions.
- High-Speed Capability: The lightweight and robust phenolic resin cage reduces centrifugal forces, enabling smooth operation at the high limiting speed of 100,500 rpm.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional control on bore, OD, and width, ensuring minimal vibration and high running accuracy.
- Premium Materials: Manufactured from chrome steel for rings and balls, providing high fatigue life and durability under demanding conditions.
7205 CD/P4ADBG27GMM Bearing Typical Application Areas
This high-precision, high-speed bearing is ideally suited for applications where rigidity, accuracy, and speed are critical. Typical uses include:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Gearboxes
- High-Frequency Motors and Spindles
- Medical and Dental Equipment (e.g., high-speed handpieces)
- Aerospace Actuation Systems
- Robotic Arm Joints and Precision Drives
