7212 CDGA/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7212 CDGA/P4A Bearing Product Overview & Core Advantages
The 7212 CDGA/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a single bearing with Universal Matchable (SU) designation, it can be mounted with other bearings from the same manufacturing lot to form a pre-loaded set, optimizing system performance. Its P4A tolerance class ensures extremely tight dimensional and running accuracy, making it ideal for high-speed spindles and other precision machinery. The bearing is pre-lubricated and features an open design for controlled lubrication management in sophisticated systems.
7212 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7212 | Basic bearing series; 60 mm bore, 110 mm OD, 22 mm width. |
| C | 15° contact angle, optimized for combined loads. |
| DG | Universal Matchable (SU) bearing; can be paired for preload. |
| A | Extra light preload class for minimal friction and heat generation. |
| /P4A | High-precision tolerance class exceeding ABEC 7 standards. |
7212 CDGA/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for high-speed applications reaching up to 32,500 rpm.
Optimized Internal Geometry: The 15° contact angle and carefully sized chrome steel balls provide an excellent balance between radial load capacity (12,870 lbf dynamic) and axial load capacity.
High-Speed Capability: The phenolic cage offers low weight and excellent performance at high rotational speeds, contributing to the high limiting speed.
Universal Matching: The Universal Matchable (SU) feature allows for the creation of precisely pre-loaded bearing sets directly from stock, simplifying assembly and ensuring optimal system rigidity.
7212 CDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Where high rotational accuracy and low noise are required.
- High-Frequency Motors: Spindles for PCB drilling and other precision machining.
- Medical Equipment: High-speed centrifuges and dental handpieces.
- Aerospace Systems: Auxiliary drives and instrumentation requiring high reliability.
