71828 CD/P4DGB
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71828 CD/P4DGB
Basic Information
System of measurement
Metric
Weight
1.6 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
140 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
175 mm
Outside diameter tolerance
-0.004mm to 0
Width
36 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
10.319 mm
Ball quantity
35
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
16380 lbf
Radial static load rating
28125 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
No drawings available at the moment, will be launched soon
In Stock
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71828 CD/P4DGB Bearing Product Overview & Core Advantages
The 71828 CD/P4DGB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and high-speed capability. As a universally matchable (SU) bearing supplied in a light preload (Class B) matched set, it enables simplified assembly and optimal performance in preloaded configurations. Its P4 tolerance class ensures ultra-precise running accuracy, making it ideal for high-rigidity spindles and other precision machinery where minimal runout and superior stability under combined loads are critical.
71828 CD/P4DGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Indicates a universal matchable (SU) bearing designed with a 15° contact angle. Two bearings can be paired in various arrangements (back-to-back, face-to-face, or tandem) to achieve the required rigidity and load capacity. |
| P4 | Denotes a high-precision tolerance class per ISO standards, specifying extremely tight limits on bore, outside diameter, and width dimensions, as well as running accuracy. |
| DGB | Signifies a matched set of two bearings supplied with a light preload (Class B). This preload eliminates internal clearance, enhancing system rigidity and rotational accuracy from startup. |
71828 CD/P4DGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 15° contact angle and universal matchable design allow the bearing to efficiently support combined radial and axial loads. When mounted in pairs, the system rigidity is significantly increased, making it suitable for applications with high moment loads.
- Superior High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 11,000 rpm. The open design facilitates efficient lubrication and cooling.
- Precision Engineering: Manufactured to P4 tolerance standards with a light preload, this bearing guarantees minimal vibration and exceptional running accuracy, which is paramount for precision spindles.
- Optimized Internal Geometry: With 35 high-grade chrome steel balls of 10.319 mm diameter, the bearing provides a high dynamic load rating of 16,380 lbf and a static load rating of 28,125 lbf for reliable, long-term performance.
71828 CD/P4DGB Bearing Typical Application Areas
The 71828 CD/P4DGB is engineered for high-performance applications where precision and speed are non-negotiable. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy robotic arms and joints.
- High-Frequency Motors and Spindles: Motors for PCB drilling and dental handpieces.
- Medical Equipment: Centrifuges and high-speed scanners.
- Aerospace & Defense Systems: Gyroscopes and navigation instruments.
