7210 ACD/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7210 ACD/P4A Bearing Product Overview & Core Advantages
The 7210 ACD/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring superior rotational accuracy and rigidity. Its defining characteristic is the 25° contact angle, which is optimized to support significant combined loads—handling both radial and axial forces efficiently in one direction. Manufactured to P4 (ABEC-7) tolerance class, this bearing ensures minimal runout and vibration, making it ideal for high-speed spindles and precision machinery. The phenolic cage contributes to smooth operation at the limiting speed of 22,000 rpm, while the preload availability enhances system stiffness and positioning accuracy.
7210 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle, optimized for high axial load capacity and rigidity. |
| P4A | Indicates P4 (ABEC-7) tolerance class with specific internal clearance and geometric accuracy for precision applications. |
7210 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and optimized raceway geometry enable the bearing to withstand high combined radial and axial loads. The availability of preload further increases system stiffness, reducing deflection under operational stresses.
- High-Speed Performance: The lightweight phenolic resin cage ensures excellent dimensional stability and low friction at high speeds, supporting the limiting speed of 22,000 rpm. This cage material also offers good resistance to centrifugal forces and thermal expansion.
- Precision & Accuracy: Manufactured to P4 (ABEC-7) tolerance standards, the bearing guarantees tight dimensional control (bore: -0.006mm to 0, OD: -0.008mm to 0) for minimal runout and vibration, critical in high-precision spindle applications.
- Material & Lubrication: Both rings and balls are made from high-grade chrome steel, providing high hardness, wear resistance, and fatigue life. The bearing comes lubricated for immediate use, suitable for a temperature range of -30°C to 110°C.
7210 ACD/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines requiring precision bearings with high rigidity and speed capability.
- Precision Industrial Pumps & Compressors: Applications demanding accurate shaft positioning and the ability to handle combined loads.
- High-Speed Robotic Drives: Joint and arm actuators where angular contact ball bearings provide axial rigidity and rotational accuracy.
- Medical & Laboratory Equipment: Centrifuges, dental handpieces, and imaging systems that operate at high speeds with minimal vibration.
