S71910 ACB/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71910 ACB/P4A
Basic Information
System of measurement
Metric
Weight
0.14 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.007mm to 0
Width
12 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° to 110 °C
Radial dynamic load rating
1638 lbf
Radial static load rating
1350 lbf
Limiting speed
22 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
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:
$ 485.71
/ each
In Stock
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S71910 ACB/P4A Bearing Product Overview & Core Advantages
The S71910 ACB/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Designed to accommodate combined loads (radial and axial loads in one direction), this bearing features a P4 (ABEC-7) tolerance class and is preloaded, ensuring minimal runout and superior system stability. Its compact cross-section, with a 50 mm bore, 72 mm outside diameter, and a narrow 12 mm width, makes it ideal for space-constrained, high-speed spindles and other precision machinery demanding high reliability and performance.
S71910 ACB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Designates a bearing from a specific high-precision series. |
| 71910 | The basic bearing designation, indicating a 50 mm bore, 72 mm OD, and 12 mm width. |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| B | Indicates a 40° contact angle variant. (Note: Specification data shows 25°, please verify application-specific variant). |
| P4A | Denotes a P4 (ABEC-7) tolerance class, signifying extremely tight dimensional and running accuracy for precision applications. |
S71910 ACB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to a P4 tolerance class with a phenolic resin cage, this bearing ensures minimal vibration and high running accuracy, which is critical for machine tool spindles. The specified preload further enhances system stiffness.
- Superior Load Capacity: The angular contact design with a 25° contact angle is optimized to handle significant combined radial and axial loads simultaneously, providing robust performance in demanding conditions.
- Optimized High-Speed Performance: The lightweight phenolic cage and precision-ground chrome steel components contribute to a high limiting speed of 22,000 rpm, making it suitable for very high-speed applications.
- Pre-Lubricated and Sealed: The bearing comes lubricated and sealed, protecting against contamination and providing long-term, maintenance-free operation within its specified temperature range.
S71910 ACB/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors and Spindles: Where minimal runout and high rigidity are paramount.
- Medical and Dental Equipment: High-speed handpieces and scanners.
- Aerospace Instrumentation: Gyroscopes and other precision navigation systems.
