71830 ACD/P4DGB
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71830 ACD/P4DGB
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
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
35
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
17842 lbf
Radial static load rating
30825 lbf
Limiting speed
11 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
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In Stock
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71830 ACD/P4DGB Bearing Product Overview & Core Advantages
The 71830 ACD/P4DGB is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This universal matchable bearing comes in a set of two, pre-loaded to Light / Class B specifications, ensuring optimal performance when mounted in a back-to-back (DB) or face-to-face (DF) arrangement. Its key advantages include the ability to handle combined loads (radial and axial) simultaneously, superior running accuracy due to its P4 tolerance class, and high-speed capability supported by a phenolic cage. The open design allows for custom lubrication schemes to suit specific operational needs.
71830 ACD/P4DGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Contact Angle of 25° and a phenolic (resin) cage. |
| P4 | Indicates a high-precision tolerance class with extremely tight dimensional and running accuracy tolerances. |
| DGB | Signifies a Universal Matchable (SU) bearing. Two bearings are supplied as a pre-set, light preload (Class B) matched pair. |
71830 ACD/P4DGB Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The double row angular contact design provides high rigidity, enabling the bearing to support significant combined radial and axial loads from both directions. The 25° contact angle is optimized for axial load carrying capacity.
- Precision and High-Speed Performance: Manufactured to a P4 tolerance class, this bearing guarantees superior running accuracy and minimal vibration. The lightweight phenolic cage is ideal for high-speed applications, contributing to a limiting speed of 11,000 rpm by reducing centrifugal forces and allowing efficient lubrication.
- Universal Matchability: As a Universal Matchable (SU) pair, these bearings simplify installation. They can be mounted in various arrangements (DB, DF) without the need for selective shimming, ensuring consistent, pre-determined preload and performance.
- Durable Construction: Made from chrome steel for both rings and balls, the bearing offers high fatigue life and wear resistance, suitable for a wide temperature range from -30°C to 110°C.
71830 ACD/P4DGB Bearing Typical Application Areas
This precision bearing is engineered for high-performance machinery where accuracy and speed are critical. Key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Gearboxes: In robotics, aerospace, and other high-tech industries.
- High-Frequency Motors and Spindles
- Medical Equipment: Such as dental handpieces and imaging devices.
- Test and Measurement Equipment
