71815 ACD/P4DFA
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71815 ACD/P4DFA
Basic Information
System of measurement
Metric
Weight
0.28 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
75 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
95 mm
Outside diameter tolerance
-0.004mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
33
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4860 lbf
Radial static load rating
7200 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Face-to-Face (DF)
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
No drawings available at the moment, will be launched soon
In Stock
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71815 ACD/P4DFA Bearing Product Overview & Core Advantages
The 71815 ACD/P4DFA is a super-precision angular contact ball bearing designed for the most demanding applications. This duplex face-to-face (DF) matched set delivers exceptional rotational accuracy and system rigidity. Its core advantage lies in its ability to handle combined radial and axial loads simultaneously, making it ideal for high-speed spindles and precision machinery where high rigidity and minimal runout are critical. The P4 tolerance class ensures superior dimensional and running accuracy for unparalleled performance.
71815 ACD/P4DFA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71815 ACD/P4DFA provides a detailed technical specification:
- 71815: Basic bearing series and size designation (75mm bore, 95mm OD, 20mm width).
- AC: Angular Contact design with a 25° contact angle.
- D: Indicates a Duplex (two-bearing) set.
- P4: Denotes a high-precision tolerance class, superior to ABEC-7.
- DF: Specifies the Duplex Face-to-Face mounting arrangement.
- A: Signifies an Extra Light preload for optimal high-speed performance.
71815 ACD/P4DFA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex face-to-face (DF) arrangement creates a highly rigid bearing system that can withstand significant combined loads and moment loads, ensuring stability under complex operating conditions.
- Super-Precision Performance: Manufactured to P4 tolerance class, this bearing guarantees minimal runout and vibration, which is essential for achieving high surface finishes and machining accuracy.
- Optimized High-Speed Capability: The phenolic resin cage is lightweight and robust, enabling smooth operation at the high limiting speed of 28,000 rpm. The 25° contact angle provides an excellent balance between radial and axial load capacity for high-speed applications.
- Enhanced Durability: Constructed from high-grade chrome steel for both rings and balls, the bearing offers high fatigue life and wear resistance. The set is pre-lubricated for immediate use.
71815 ACD/P4DFA Bearing Typical Application Areas
This bearing is engineered for high-performance machinery where precision and speed are non-negotiable. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Motors
- Medical & Dental Equipment Spindles
- Aerospace Test Equipment
