71806 ACDGA/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71806 ACDGA/P4
Basic Information
System of measurement
Metric
Weight
0.026 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
30 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
42 mm
Outside diameter tolerance
-0.004mm to 0
Width
7 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
936 lbf
Radial static load rating
799 lbf
Limiting speed
100.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
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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71806 ACDGA/P4 Bearing Product Overview & Core Advantages
The 71806 ACDGA/P4 is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing with a Universal Matchable (SU) designation, it can be universally paired with another bearing of the same type to form a duplex set, offering design flexibility for preload optimization. Its compact 7mm width and P4 tolerance class make it ideal for high-precision, high-reliability spindles and machinery where space is constrained and rigidity is paramount.
71806 ACDGA/P4 Bearing Model Code Explained, Specifications & Naming Convention
The model number 71806 ACDGA/P4 is decoded as follows:
- 71806: Basic series designation for a super-precision, light-weight angular contact ball bearing.
- AC: Angular Contact design with a 25° contact angle.
- D: Signifies a duplex ready bearing, part of a Universal Matchable (SU) pair.
- GA: Indicates a specific internal design and preload level. GA corresponds to an Extra Light (Class A) preload.
- P4: Denotes a super-precision tolerance class, ensuring extremely tight dimensional and running accuracy.
71806 ACDGA/P4 Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of a lightweight phenolic resin cage, a 25° contact angle, and optimized internal geometry enables a very high limiting speed of 100,500 rpm.
- Super-Precision Operation: Manufactured to P4 tolerance class with extremely tight bore, outside diameter, and width tolerances, this bearing guarantees exceptional running accuracy and minimal vibration.
- High Rigidity & Load Capacity: The angular contact design efficiently supports combined loads (radial and axial). The extra light preload (Class A) eliminates internal clearance, providing high system rigidity from startup.
- Universal Matching: As a Universal Matchable (SU) bearing, any two 71806 ACDGA/P4 bearings can be universally paired in any arrangement (back-to-back, face-to-face, or tandem), simplifying inventory and assembly for duplex sets.
- Material & Lubrication: Manufactured from high-grade chrome steel for both rings and balls, ensuring durability and long service life. The bearing is pre-lubricated for immediate operation.
71806 ACDGA/P4 Bearing Typical Application Areas
This precision bearing is engineered for the most demanding high-speed and high-accuracy applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for dental handpieces and small precision motors.
- Aerospace Instrumentation: Gyroscopes and other navigation systems.
