S71915 CD/P4ADBA
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71915 CD/P4ADBA
Basic Information
System of measurement
Metric
Weight
0.72 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
15 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
13162 lbf
Radial static load rating
16875 lbf
Limiting speed
28 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
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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S71915 CD/P4ADBA Bearing Product Overview & Core Advantages
The S71915 CD/P4ADBA is a precision duplex pair of metric angular contact ball bearings arranged in a Back-to-Back (DB) configuration. This high-performance assembly is designed to handle combined radial and axial loads simultaneously, offering exceptional rotational accuracy and system rigidity. Manufactured to the stringent P4A tolerance class and preloaded to Extra Light (Class A), it is engineered for applications demanding high precision, high speed, and reliable operation in a compact footprint.
S71915 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Code | Technical Meaning |
|---|---|---|
| Prefix | S | Signifies a super-precision bearing. |
| Size Series | 71915 | Defines the bearing dimensions: 75mm bore, 105mm OD, 32mm width. |
| Arrangement | CD | Indicates a Duplex pair in Back-to-Back (DB) arrangement with a specific preload. |
| Tolerance Class | P4A | Denotes an extremely high precision tolerance class for superior running accuracy. |
| Suffix | DBA | Specifies the preload level (A = Extra Light) for the duplex set. |
S71915 CD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The Back-to-Back (DB) duplex arrangement creates a wide effective spread, significantly increasing moment stiffness and operational stability, making it ideal for applications subjected to overturning moments.
- Superior Load Capacity: With a 15° contact angle and duplex design, this bearing pair is optimized to handle significant combined loads (radial and bidirectional axial loads) efficiently.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the grease lubrication and precision construction enable a high limiting speed of 28,000 rpm.
- Precision & Accuracy: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, ensuring minimal runout and superior rotational accuracy.
- Sealed & Lubricated for Life: As a sealed unit pre-lubricated with grease, it is protected from contamination and is maintenance-free within its specified temperature range of -30°C to 110°C.
S71915 CD/P4ADBA Bearing Typical Application Areas
The S71915 CD/P4ADBA is engineered for high-performance machinery requiring utmost precision and speed. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and High-Frequency Motors.
- Industrial Pumps and Compressors.
- Robotic Arms and Automated Positioning Systems.
- Medical Equipment and Analytical Instruments.
