71830 CD/P4DFB
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71830 CD/P4DFB
Basic Information
System of measurement
Metric
Weight
2.2 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
150 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
190 mm
Outside diameter tolerance
-0.004mm to 0
Width
40 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
35
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
18720 lbf
Radial static load rating
32850 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Face-to-Face (DF)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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71830 CD/P4DFB Bearing Product Overview & Core Advantages
The 71830 CD/P4DFB is a precision duplex pair of angular contact ball bearings designed for applications requiring exceptional rotational accuracy and rigidity. This Face-to-Face (DF) matched set is preloaded to Light / Class B specifications, ensuring optimal performance under combined radial and axial loads. Manufactured to P4 tolerance class, it delivers high running accuracy and is ideal for high-speed spindles and other precision machinery where high rigidity and minimal runout are critical.
71830 CD/P4DFB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71830 | Basic bearing designation indicating a metric, angular contact ball bearing with a 150 mm bore, 190 mm OD, and 40 mm width. |
| C | Designates a 15° contact angle, optimized for high-speed operation and handling combined loads. |
| D | Indicates the bearing is part of a duplex pair (a matched set of two bearings). |
| P4 | Specifies the tolerance class, denoting very high precision with tight dimensional and running accuracy tolerances. |
| DF | Denotes the Face-to-Face mounting arrangement of the duplex pair, which provides high moment rigidity. |
| B | Specifies the Light preload (Class B) applied to the matched set, reducing axial play and enhancing system stiffness. |
71830 CD/P4DFB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex DF arrangement creates a highly rigid bearing system capable of withstanding significant combined loads (radial and axial loads acting simultaneously). The 15° contact angle is engineered to handle substantial thrust loads in both directions.
- Precision & High-Speed Performance: The P4 tolerance class ensures minimal runout and vibration, which is critical for high-speed applications up to 11,000 rpm. The lightweight phenolic cage contributes to lower centrifugal forces and smoother operation at high rotational speeds.
- Optimized Internal Geometry: With 35 precision balls of 11.112 mm diameter, the bearing provides a high load rating and stable operation. The open seal type allows for customized lubrication schemes to further optimize performance for specific operating conditions.
- Superior Material: Constructed from chrome steel for both rings and balls, the bearing offers high durability, wear resistance, and a long operational lifespan under demanding conditions.
71830 CD/P4DFB Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision and rigidity are paramount. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Especially in applications requiring precise shaft positioning and low noise.
- High-Frequency Motors and Spindles: Used in PCB drilling, semiconductor manufacturing, and other high-RPM processes.
- Medical and Laboratory Equipment: Centrifuges and other precision rotary devices.
- Robotics and Automation: High-accuracy rotary joints and arm assemblies.
