71813 CDGB/P4
71800 Series Super Precision Angular Contact Ball Bearings
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71813 CDGB/P4 Bearing Product Overview & Core Advantages
The 71813 CDGB/P4 is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a single bearing with a Universal Matchable (SU) designation, it is engineered to be paired with other bearings to form a precisely preloaded set, delivering superior system performance. Its P4 tolerance class ensures extremely tight dimensional and running accuracy, making it ideal for high-speed spindles and other precision machinery. The combination of a light preload (Class B) and a 15° contact angle provides optimal stiffness and handling of combined loads.
71813 CDGB/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71813 | Basic bearing series and size designation (65mm bore, 85mm OD, 10mm width). |
| C | 15° nominal contact angle. |
| D | A light preload is applied (Class B). |
| G | The bearing is supplied with a universal match designation, allowing it to be mounted in any combination to achieve a specific preload. |
| B | The bearing is supplied with a 40° contact angle modification for optimized performance in a universal match set. |
| /P4 | Denotes a high-precision tolerance class with very tight limits on bore, outside diameter, and width. |
71813 CDGB/P4 Bearing Structural Features & Performance Benefits
This bearing's performance is derived from its advanced construction. The use of a phenolic resin cage is critical for high-speed operation, offering excellent strength-to-weight ratio and reduced friction at the limiting speed of 36,000 rpm. The open seal type allows for optimal lubrication flow and heat dissipation, which is essential in high-velocity applications. Manufactured from high-grade chrome steel for both rings and balls, it ensures high durability and fatigue life under the specified dynamic and static load ratings. The light preload eliminates internal clearance, resulting in significantly increased system rigidity and precise shaft positioning without the need for complex adjustment during installation.
71813 CDGB/P4 Bearing Typical Application Areas
The 71813 CDGB/P4 is engineered for the most demanding precision applications. Its primary use is in machine tool spindles for milling, grinding, and turning centers, where high speed, rigidity, and accuracy are paramount. It is also ideally suited for high-speed precision spindles in PCB drilling, dental handpieces, and other automated equipment. Furthermore, its universal match capability makes it a cornerstone component in the assembly of high-precision bearing sets for robotics, aerospace positioning systems, and advanced medical instrumentation.
