S71915 ACB/P4ADT
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71915 ACB/P4ADT
Basic Information
System of measurement
Metric
Weight
0.76 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
75 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
105 mm
Outside diameter tolerance
-0.004mm to 0
Width
32 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
34
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4860 lbf
Radial static load rating
5625 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Grease
Matched arrangement
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
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
In Stock
Price available upon request.
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S71915 ACB/P4ADT Bearing Product Overview & Core Advantages
The S71915 ACB/P4ADT is a precision duplex tandem angular contact ball bearing designed for high-performance applications requiring exceptional rigidity and accuracy. This P4A tolerance class bearing features a sealed design and is preloaded, enabling it to handle significant combined loads (radial and axial) simultaneously. Its compact duplex tandem (DT) arrangement provides maximum axial stiffness and is ideal for high-speed spindles and other precision machinery demanding superior running accuracy and reliability.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S71915 | Basic bearing designation (75mm bore, 105mm OD, 32mm width) |
| AC | Angular Contact design with a 25° contact angle |
| B | Specifies a 40° contact angle (Note: conflicting data, please verify specification) |
| /P4A | High precision tolerance class (equivalent to ABEC 7) |
| DT | Duplex Tandem arrangement for maximum axial rigidity |
S71915 ACB/P4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem arrangement of two bearings provides exceptional axial stiffness, enabling stable operation under heavy combined loads. With a radial dynamic load rating of 4860 lbf and static rating of 5625 lbf, it offers reliable performance in demanding applications.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring minimal runout and superior rotational accuracy.
- Optimized High-Speed Operation: The phenolic cage and 25° contact angle contribute to smooth operation at high speeds, with a limiting speed of 28,000 rpm.
- Maintenance-Free Design: Factory-sealed and pre-lubricated with grease, providing long-term reliability and reducing maintenance requirements across the operating temperature range of -30°C to 110°C.
S71915 ACB/P4ADT Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers and precision grinding spindles
- Precision Instrumentation: Measuring equipment and optical instruments requiring high accuracy
- High-Speed Automation: Robotics, CNC indexing heads, and precision positioning systems
- Medical Equipment: Dental handpieces and surgical tool drives
- Aerospace Components: Gyroscopes and navigation system assemblies
