S71907 ACD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71907 ACD/P4A
Basic Information
System of measurement
Metric
Weight
0.077 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
55 mm
Outside diameter tolerance
-0.007mm to 0
Width
10 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
21
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2077 lbf
Radial static load rating
1395 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:
$ 334.91
/ each
In Stock
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S71907 ACD/P4A Bearing Product Overview & Core Advantages
The S71907 ACD/P4A is a high-precision, single-row angular contact ball bearing designed for demanding applications. Engineered to a P4 (ABEC-7) tolerance class, it offers exceptional running accuracy. Its key advantage lies in its ability to support combined loads, accommodating significant axial loads in one direction alongside radial loads. This is facilitated by a 25° contact angle. The bearing is preloaded and comes lubricated and sealed from the factory, making it a compact, ready-to-install solution for high-speed, high-rigidity spindles and precision mechanisms.
S71907 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71907 | Denotes the bearing series and size. 'S' often indicates a super-precision bearing series. |
| ACD | Signifies a 25° contact angle and that the bearing is supplied as a preloaded set (typically two bearings mounted as a duplex pair). |
| P4A | Indicates the tolerance class is P4 (equivalent to ABEC-7), a high-precision grade. The 'A' suffix may specify a tolerance deviation or special requirements within the P4 class. |
S71907 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to a P4 tolerance class, this bearing ensures minimal runout and vibration, which is critical for applications requiring extreme accuracy. The preload eliminates internal clearance, resulting in a stiff bearing system that resists deflection under load.
- Superior Load Capacity: The 25° contact angle is optimized to handle high axial loads in one direction in addition to radial loads, making it ideal for applications with significant thrust forces.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling stable operation at the high limiting speed of 22,000 rpm. The optimized internal geometry further contributes to low heat generation at high velocities.
- Ready-to-Install and Protected: Being factory lubricated and sealed, the bearing is protected from contamination and is supplied ready for immediate installation, reducing assembly time and ensuring optimal initial performance.
S71907 ACD/P4A Bearing Typical Application Areas
This precision bearing is engineered for high-performance machinery where accuracy, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Instruments: High-resolution measuring devices and optical scanners.
- High-Frequency Spindles: PCB drilling machines and dental handpieces.
- Robotics: High-accuracy joints and actuators in industrial robots.
