7205 CD/P4ADBG27
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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7205 CD/P4ADBG27 Bearing Product Overview & Core Advantages
The 7205 CD/P4ADBG27 is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This duplex bearing set, arranged in a Back-to-Back (DB) configuration, is preloaded to provide superior system stiffness and minimize axial and radial runout. Its primary advantage lies in its ability to handle combined loads (simultaneous radial and axial loads) with high precision, making it ideal for high-speed, high-rigidity spindles and other critical machinery components.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7205 | Basic bearing series, indicating a 25mm bore, 52mm OD, and 30mm width. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| D | Indicates the bearing is part of a Duplex (DB) pair. |
| P4A | Denotes a high-precision tolerance class (superior to ABEC 7), ensuring minimal dimensional and running inaccuracies. |
| DB | Confirms the Back-to-Back mounting arrangement of the duplex set. |
| G27 | Specifies the preload level within the matched set. |
7205 CD/P4ADBG27 Bearing Structural Features & Performance Benefits
- High Rigidity & Preload: The Back-to-Back (DB) duplex arrangement with factory-applied preload creates a highly rigid bearing system that effectively resists moment loads and maintains precise shaft positioning under combined loads.
- Optimized for High Speeds: The 15° contact angle and lightweight phenolic resin cage are engineered to minimize centrifugal forces and friction, enabling stable operation at the high limiting speed of 100,500 rpm.
- Precision Performance: Manufactured to P4A tolerance class, this bearing guarantees extremely tight dimensional control (bore/OD tolerance: -0.004mm to 0) for applications requiring minimal runout and vibration.
- Superior Load Capacity: With a dynamic load rating of 4972 lbf and static load rating of 3285 lbf, it reliably handles significant radial and axial forces in demanding operational conditions.
- Material Quality: Components made from high-grade chrome steel ensure durability, long service life, and consistent performance.
7205 CD/P4ADBG27 Bearing Typical Application Areas
The 7205 CD/P4ADBG27 is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives: High-frequency motor spindles and servo drives.
- Robotics: Articulated arm joints and precision reducers.
- Aerospace & Defense: Gyroscopes, radar systems, and navigation equipment.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
