7210 CDGB/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
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7210 CDGB/P4A Bearing Product Overview & Core Advantages
The 7210 CDGB/P4A is a high-precision single row angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Its primary advantage lies in its P4A super-precision tolerance class and Universal Matchable (SU) design, allowing for precise preload control when mounted in sets. This bearing is optimized to handle combined loads, primarily thrust loads in one direction, and is engineered for high-speed operation up to 41,000 rpm, making it an ideal choice for high-performance spindles and precision machinery.
7210 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7210 | Basic bearing designation: 50 mm bore, 90 mm OD, 20 mm width. |
| C | Designates a 15° contact angle, optimized for high-speed applications and high thrust capacity. |
| DGB | Indicates a Universal Matchable (SU) bearing. Two bearings can be mounted in a "back-to-back" (DB) arrangement to support combined loads. |
| P4A | Specifies the tolerance class, denoting superior dimensional and running accuracy beyond ABEC 7 (P4) standards, with specific focus on axial runout control. |
7210 CDGB/P4A Bearing Structural Features & Performance Benefits
High Precision & Rigidity: Manufactured to P4A super-precision standards, this bearing ensures minimal runout and vibration, critical for applications like machine tool spindles. The 15° contact angle provides an excellent balance between radial and axial load capacity, contributing to system rigidity.
Optimized for High Speeds: The phenolic resin cage is lightweight and possesses excellent sliding properties, reducing friction and centrifugal forces, which is essential for achieving the high limiting speed of 41,000 rpm.
Superior Load Capacity: With a dynamic load rating of 10,102 lbf and a static load rating of 7,650 lbf, it reliably handles significant combined loads. The universal matching (SU) feature allows for simplified mounting in preloaded sets (typically 2 or 3 bearings) to achieve the required stiffness and accuracy without selective assembly.
Material & Lubrication: Constructed from chrome steel for both rings and balls, ensuring high durability and fatigue life. The bearing is supplied lubricated for immediate use, suitable for an operating temperature range of -30°C to 110°C.
7210 CDGB/P4A Bearing Typical Application Areas
The 7210 CDGB/P4A is ideally suited for high-precision, high-speed rotational systems. Key application areas include:
- Machine Tool Spindles (milling, grinding, and turning centers)
- High-Frequency Motors and Spindles
- Precision Robotics and Automation Equipment
- Aerospace & Defense Instrumentation
- Medical Equipment such as dental handpieces and imaging devices
