71812 CDGA/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 71812 CDGA/P4 is a metric single-row angular contact ball bearing designed for applications demanding exceptional precision and reliability. As a P4 tolerance class bearing, it delivers superior running accuracy and dimensional stability. Its 15° contact angle is optimized to efficiently support combined loads (radial and axial loads simultaneously). The bearing comes pre-lubricated and is part of a Universal Matchable (SU) set, allowing for precise preload control when mounted in pairs. This combination of high precision, specific load handling, and matching capability makes it ideal for high-performance, high-rigidity applications.
71812 CDGA/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71812 | Basic bearing series and size designation | Indicates a metric, single-row angular contact bearing with a 60mm bore, 78mm OD, and 10mm width. |
| C | 15° Contact Angle | Optimized for handling combined radial and axial loads. |
| DG | Universal Matchable Bearing (SU designation) | Can be mounted in pairs (back-to-back, face-to-face, or tandem) to support higher loads or moments. |
| A | Extra Light Preload | Provides minimal internal clearance for high rotational accuracy and rigidity. |
| P4 | Tolerance Class | Denotes a high-precision bearing with extremely tight dimensional and running accuracy tolerances. |
Structural Features and Performance Benefits
High Precision and Rigidity: The P4 tolerance class ensures minimal runout and precise dimensional control, which is critical for applications requiring high positional accuracy. The extra light preload (A) eliminates internal clearance, resulting in superior system stiffness and reduced vibration.
Optimized Load Capacity: The 15° contact angle design allows this angular contact ball bearing to carry significant radial loads and axial loads in one direction simultaneously. Its dynamic load rating of 3038 lbf and static load rating of 3218 lbf confirm its robust performance.
High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 33,000 rpm. This makes it suitable for high-speed spindle applications.
Material and Construction: Manufactured from chrome steel for both rings and balls, the bearing offers high hardness and durability. The open seal design allows for efficient lubrication management in controlled environments.
71812 CDGA/P4 Bearing Typical Application Areas
The 71812 CDGA/P4 is engineered for high-performance machinery where precision and speed are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and rotary actuators requiring high rigidity and accuracy.
- High-Frequency Motors and Spindles: Applications demanding low vibration and high rotational speeds.
- Medical and Dental Equipment: High-speed handpieces and precision rotary tools.
- Aerospace Actuation Systems: Control surface actuators and other precision mechanisms.
