S71910 ACB/P4ADBB
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71910 ACB/P4ADBB
Basic Information
System of measurement
Metric
Weight
0.28 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.004mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
29
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2678 lbf
Radial static load rating
2655 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Grease
Matched arrangement
Duplex Back-to-Back (DB)
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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S71910 ACB/P4ADBB Bearing Product Overview & Core Advantages
The S71910 ACB/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back arrangement provides superior stability and can accommodate combined loads (radial and axial loads from both directions simultaneously). Manufactured to P4A tolerance class, it delivers high running accuracy and is preloaded for immediate operational readiness, making it ideal for high-speed, high-precision machinery.
S71910 ACB/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| S | Designates a super-precision bearing series. |
| 71910 | Standard bearing designation (10mm bore x 72mm OD x 12mm width series). |
| ACB | Indicates a specific contact angle of 25° and internal design. |
| P4A | Specifies the tolerance class P4A, denoting very high dimensional and running accuracy. |
| DB | Denotes the Duplex Back-to-Back matched arrangement, providing high moment rigidity. |
S71910 ACB/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing the bearing's resistance to moment loads and ensuring exceptional stiffness for precise shaft positioning.
- Superior Load Capacity: With a 25° contact angle and duplex design, this bearing is engineered to handle significant combined radial and axial loads from both directions, making it suitable for complex loading conditions.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel components and optimized internal geometry contribute to a high limiting speed of 34,000 rpm.
- Precision & Reliability: Manufactured to P4A super-precision standards with tight dimensional tolerances, this bearing ensures minimal runout and vibration, which is critical for maintaining accuracy in high-performance applications.
- Preloaded & Ready-to-Use: Supplied as a matched set with light preload (Class B), the bearing pair is ready for installation, eliminating the need for on-site adjustment and ensuring consistent performance from startup.
S71910 ACB/P4ADBB Bearing Typical Application Areas
The S71910 ACB/P4ADBB is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Spindles: In PCB drilling machines, semiconductor manufacturing equipment.
- High-Frequency Motors: Used in spindle drives and other high-RPM electric motors.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
- Robotics: High-accuracy joints and actuators.
