S71928 ACD/P4ADGA
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71928 ACD/P4ADGA
Basic Information
System of measurement
Metric
Weight
3.37 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
140 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
190 mm
Outside diameter tolerance
-0.004mm to 0
Width
48 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
29
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
32850 lbf
Radial static load rating
49500 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Grease
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
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
Price available upon request.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S71928 ACD/P4ADGA Bearing Product Overview & Core Advantages
The S71928 ACD/P4ADGA is a precision double row angular contact ball bearing engineered for applications demanding exceptional accuracy and reliability. Its design enables it to simultaneously handle significant combined loads (radial and axial loads from both directions), making it an ideal solution for complex loading scenarios. Manufactured to the stringent P4A tolerance class and featuring a universal matchable (SU) design, this bearing offers superior running accuracy, high rigidity, and stable performance in high-speed operations. Its compact design and preloaded configuration ensure optimal performance in precision machinery.
S71928 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance & Advantage |
|---|---|---|
| ACD | 25° Contact Angle, Double Row Design | Optimized for carrying combined loads and providing high rigidity. |
| P4A | High Precision Tolerance Class | Exceeds ABEC-7 standards, ensuring minimal runout and vibration for superior precision. |
| DGA | Universal Matchable (SU), Grease Lubricated | Bearings can be mounted in any combination (face-to-face, back-to-back) without preload loss. Comes pre-lubricated for immediate use. |
S71928 ACD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design with a 25° contact angle provides superior stiffness and enables the bearing to support substantial radial dynamic load ratings of 32,850 lbf and radial static load ratings of 49,500 lbf, effectively managing complex combined loads.
- Precision & High-Speed Performance: Manufactured to P4A tolerance standards with a lightweight phenolic cage, this bearing ensures excellent dimensional stability and facilitates smooth operation at limiting speeds up to 11,000 rpm.
- Sealed & Ready-to-Use: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is maintenance-free within its specified temperature range of -30°C to 110°C, offering long service life and reliability.
- Universal Matchability (SU): This feature allows for flexible mounting arrangements in sets of two, simplifying installation and ensuring consistent preload and performance in matched bearing applications.
S71928 ACD/P4ADGA Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications where accuracy, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Providing the necessary rigidity and running accuracy.
- High-Frequency Motors and Spindles: Where low vibration and high-speed capability are critical.
- Medical and Laboratory Equipment: Such as centrifuges and precision scanners.
- Robotics and Automation: Particularly in high-accuracy rotary joints and arms.
