71818 CDGC/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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71818 CDGC/P4 Bearing Product Overview & Core Advantages
The 71818 CDGC/P4 is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4 tolerance class, it guarantees minimal runout and consistent performance. Its key advantage lies in its ability to support combined loads (radial and axial) efficiently, making it ideal for demanding setups. The bearing is universally matchable (SU), allowing for precise preload control when mounted in pairs. With a moderate preload (Class C) and a 15° contact angle, it offers an optimal balance between high-speed capability and stiffness.
71818 CDGC/P4 Bearing Model Code Explained, Specifications & Naming Convention
The model number 71818 CDGC/P4 can be broken down as follows:
- 71818: Basic bearing series, indicating a lightweight, ultra-precision angular contact design with a 90mm bore.
- C: Denotes a 15° contact angle, optimized for high-speed operation and moderate axial load capacity.
- D: Indicates the bearing is supplied with a moderate preload (Class C) for enhanced rigidity.
- GC: Specifies the internal clearance/preload group for universal matching.
- P4: The tolerance class, signifying superior dimensional and running accuracy exceeding ABEC 7 standards.
Note: This is an open (unsealed) bearing, supplied lubricated from the factory.
71818 CDGC/P4 Bearing Structural Features & Performance Benefits
The performance of the 71818 CDGC/P4 is a direct result of its precision engineering and material selection:
- High Rigidity & Precision: The P4 tolerance class ensures tight control over all bearing dimensions, leading to superior system rigidity and accuracy. The phenolic cage contributes to smooth operation at high speeds.
- Optimized Load Capacity: The 15° contact angle is engineered to handle significant combined loads. With a dynamic load rating of 4860 lbf and a static load rating of 5962 lbf, it provides reliable performance under stress.
- High-Speed Performance: The lightweight phenolic cage and optimized internal geometry allow for a high limiting speed of 15,000 rpm, making it a true high-speed bearing.
- Universal Matching Capability (SU): This feature allows two identical bearings to be mounted together in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement to support higher loads or achieve specific preload conditions.
71818 CDGC/P4 Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance machinery where accuracy and speed are critical. Common applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Gearboxes: Especially in robotics and aerospace actuation systems.
- High-Frequency Motors and Spindles: Used in PCB drilling and semiconductor manufacturing equipment.
- Medical and Laboratory Equipment: Such as centrifuges and high-resolution scanners.
