71812 CDGB/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71812 CDGB/P4
Basic Information
System of measurement
Metric
Weight
0.1 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
78 mm
Outside diameter tolerance
-0.004mm to 0
Width
10 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3038 lbf
Radial static load rating
3218 lbf
Limiting speed
33 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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71812 CDGB/P4 Bearing Product Overview & Core Advantages
The 71812 CDGB/P4 is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing in a universally matchable (SU) set, it is engineered to accommodate combined loads, primarily thrust loads in one direction, with a 15° contact angle. Its key advantages include high rigidity and outstanding running accuracy, making it ideal for high-precision, high-reliability spindles and machinery. The bearing comes pre-lubricated and features a P4 tolerance class for superior dimensional and running precision.
71812 CDGB/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71812 | Basic bearing designation, indicating a super-precision, light preload angular contact bearing with a 60mm bore. |
| C | 15° contact angle, optimized for high-speed operation. |
| D | Light preload (Class B). This internal preload ensures shaft rigidity and minimizes deflection under operational loads. |
| G | Universal Matchable (SU). The bearing can be paired with another identical bearing in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement to achieve specific stiffness and load-carrying characteristics. |
| B | Standard ring material and heat stabilization for operating temperatures up to 120°C. |
| /P4 | Indicates a high-precision tolerance class per ISO standards, ensuring extremely tight dimensional and running accuracy for demanding applications. |
71812 CDGB/P4 Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The angular contact design with a 15° contact angle and light preload (Class B) provides excellent shaft positioning accuracy and system stiffness, critical for minimizing deflection under high-speed and combined loads.
- Optimized for High Speeds: The phenolic resin cage is lightweight and possesses excellent sliding properties, contributing to lower friction, reduced heat generation, and a high limiting speed of 33,000 rpm. The open design allows for efficient lubrication management.
- Superior Load Capacity: Manufactured from high-grade chrome steel for both rings and balls, this bearing offers a high dynamic and static load rating, reliably handling significant radial and one-direction thrust loads.
- Universal Matching Capability (SU): As a universally matchable bearing, it enables precise preload and performance tuning when mounted in sets, providing design flexibility for complex spindle configurations.
71812 CDGB/P4 Bearing Typical Application Areas
This precision bearing is specifically engineered for high-performance machinery where speed, accuracy, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for integrally mounted motor applications.
- Robotics: High-precision joints and actuators.
