71804 CD/P4DGB
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71804 CD/P4DGB
Basic Information
System of measurement
Metric
Weight
0.036 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
20 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
32 mm
Outside diameter tolerance
-0.004mm to 0
Width
14 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
17
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1404 lbf
Radial static load rating
1192 lbf
Limiting speed
100.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
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
No drawings available at the moment, will be launched soon
Price:
$ 143.52
/ each
In Stock
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71804 CD/P4DGB Bearing Product Overview & Core Advantages
The 71804 CD/P4DGB is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a metric, single-row bearing, its core advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high rigidity. Manufactured to P4 tolerance class and featuring a Universal Matchable (SU) design, it enables simplified mounting of preloaded pairs for optimal stiffness and running accuracy. The phenolic cage and factory-applied lubrication contribute to its high limiting speed, making it an ideal choice for high-precision, high-reliability spindles and machinery.
71804 CD/P4DGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71804 | Basic bearing designation indicating the size series and 20mm bore diameter. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and moderate axial loads. |
| D | Indicates a Light preload / Class B. This internal preload ensures shaft rigidity and minimizes axial play, enhancing positional accuracy. |
| P4 | Denotes the tolerance class, signifying very high precision levels for dimensional and running accuracy. |
| DGB | Signifies that the bearing is Universal Matchable (SU). Two such bearings can be mounted in a universal arrangement (face-to-face, back-to-back, or tandem) to achieve the desired preload and stiffness. |
71804 CD/P4DGB Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class with a Light preload, this bearing provides superior shaft positioning and minimizes deflection under load, ensuring high running accuracy.
- Optimized for High Speeds: The lightweight phenolic cage reduces centrifugal forces, while the 15° contact angle and factory lubrication work in concert to achieve an exceptional limiting speed of 100,500 rpm.
- Universal Matching Capability: The Universal Matchable (SU) design allows for flexible mounting of bearing pairs without selective matching, simplifying assembly and enabling precise control over system preload and stiffness.
- Robust Load Capacity: With a dynamic load rating of 1404 lbf and static load rating of 1192 lbf, it reliably handles combined radial and axial loads in demanding applications.
- Durable Construction: Made from chrome steel for both rings and balls, the bearing offers high wear resistance and long service life.
71804 CD/P4DGB Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Systems: Encoders, measuring instruments, and rotary tables.
- High-Frequency Motors and Spindles: Where minimal runout and high rotational speeds are critical.
- Medical and Laboratory Equipment: Centrifuges and other precision rotary devices.
