71800 ACD/P4DFA
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71800 ACD/P4DFA
Basic Information
System of measurement
Metric
Weight
0.01 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
10 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
19 mm
Outside diameter tolerance
-0.004mm to 0
Width
10 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
2.381 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
655 lbf
Radial static load rating
418 lbf
Limiting speed
95 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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71800 ACD/P4DFA Bearing Product Overview & Core Advantages
The 71800 ACD/P4DFA is a super-precision metric angular contact ball bearing supplied as a duplex face-to-face (DF) matched set. Engineered for applications demanding the highest levels of accuracy and performance, this bearing excels at handling combined loads (radial and axial) simultaneously. Its P4 tolerance class ensures exceptional running accuracy, while the extra light preload (Class A) minimizes friction and heat generation, making it ideal for high-speed operation up to 95,000 rpm. The compact design, with a 10 mm bore, offers a high-performance solution in a minimal space.
71800 ACD/P4DFA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71800 ACD/P4DFA is decoded as follows:
- 71800: Basic series designation for a super-precision, small-bore angular contact ball bearing.
- A: Signifies Extra Light Preload (Class A), which provides minimal starting and running torque.
- C: Indicates a 25° Contact Angle, optimized for supporting higher axial loads.
- D: Denotes a Duplex (two-bearing) configuration.
- P4: Specifies the tolerance class, equivalent to ABEC 7, indicating very high precision in dimensions and running accuracy.
- DF: Defines the Duplex Face-to-Face mounting arrangement, which provides good rigidity and accommodates moment loads.
- A: Confirms the Class A Preload on the matched set.
71800 ACD/P4DFA Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The duplex face-to-face (DF) arrangement creates a highly rigid bearing system capable of withstanding significant combined radial and axial loads from both directions, as well as moment loads.
- Super-Precision Performance: Manufactured to P4 tolerance class, this bearing guarantees extremely tight dimensional control and superior running accuracy, which is critical for applications like high-speed spindles.
- Optimized High-Speed Operation: The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and stable operation at the limiting speed of 95,000 rpm. The standard lubrication is suitable for the specified temperature range.
- Premium Material Construction: Made from chrome steel for both rings and balls, the bearing offers high hardness, wear resistance, and a long operational life under demanding conditions.
71800 ACD/P4DFA Bearing Typical Application Areas
This bearing is specifically designed for high-precision, high-speed machinery, including:
- Machine Tool Spindles
- High-Frequency Machining Centers
- Precision Grinding Spindles
- Dental and Medical Handpiece Drives
- High-Speed Robotics and Automation
