S7211 ACD/P4ADBBVP020
Sealed Super Precision Angular Contact Ball Bearings
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Main Dimensions
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S7211 ACD/P4ADBBVP020 Bearing Product Overview & Core Advantages
The S7211 ACD/P4ADBBVP020 is a metric duplex back-to-back angular contact ball bearing designed for high-precision applications requiring exceptional rigidity and accuracy. This P4A tolerance class bearing is preloaded (Light / Class B) and comes as a matched set, delivering superior performance in handling combined radial and axial loads. Its sealed design with grease lubrication ensures long-term reliability and minimal maintenance, making it ideal for demanding, high-speed machinery where precision and high rigidity are paramount.
Model Code Detailed Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S7211 | Basic bearing series and size designation (55mm bore, 100mm OD, 42mm width) |
| AC | Angular Contact design with a 25° contact angle |
| D | Duplex arrangement (Two bearings supplied as a set) |
| DB | Back-to-Back mounting configuration for high moment rigidity |
| P4A | High precision tolerance class (superior to ABEC 7) |
| VP020 | Vibration level specification indicating low noise operation |
S7211 ACD/P4ADBBVP020 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a rigid bearing system capable of withstanding heavy combined loads and moment loads. With a radial dynamic load rating of 19,170 lbf and static rating of 18,338 lbf, it provides robust support for demanding applications.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), ensuring exceptional running accuracy and minimal vibration.
- Optimized High-Speed Operation: The phenolic cage and grease lubrication enable stable performance at high rotational speeds up to 34,000 rpm, while the 25° contact angle provides excellent axial load capacity.
- Sealed & Pre-lubricated Design: Factory-sealed and pre-greased for immediate installation and long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
S7211 ACD/P4ADBBVP020 Bearing Typical Application Areas
This high-precision duplex bearing is specifically engineered for applications requiring exceptional accuracy and rigidity:
- Machine Tool Spindles - High-speed machining centers and precision grinding machines
- Precision Gearboxes - Industrial transmissions requiring minimal deflection
- High-Speed Motors - Servo motors and spindle drives
- Medical Equipment - CT scanners and high-speed dental handpieces
- Aerospace Components - Actuators and control surface mechanisms
