71806 CD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71806 CD/P4DGA
Basic Information
System of measurement
Metric
Weight
0.052 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
14 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1609 lbf
Radial static load rating
1688 lbf
Limiting speed
83 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
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 CD/P4DGA Bearing Product Overview & Core Advantages
The 71806 CD/P4DGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. As a universal matchable (SU) bearing supplied in a pre-matched duplex set, it is engineered to accommodate combined loads (radial and axial) simultaneously. Its P4 tolerance class ensures ultra-precise running accuracy, while the extra light preload (Class A) minimizes friction and heat generation, making it ideal for high-rigidity and high-reliability spindle arrangements.
71806 CD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71806 CD/P4DGA is decoded as follows:
- 71806: Basic series designation for a high-precision, light series angular contact ball bearing.
- C: Signifies a 15° contact angle, optimized for high-speed operation and moderate axial loads.
- D: Indicates the bearing is part of a universally matchable (DU) pair. When two such bearings are mounted together in a specific arrangement (face-to-face, back-to-back, or tandem), they form a pre-loaded set.
- P4: Denotes a super-precision tolerance class per ISO standards, guaranteeing extremely tight dimensional and running accuracy for demanding applications.
- DGA: Indicates the bearing is lubricated and comes as part of a universally matchable duplex set.
71806 CD/P4DGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex set configuration provides significantly increased system rigidity and enables the bearing arrangement to support substantial combined radial and axial loads from both directions.
- Superior High-Speed Performance: The 15° contact angle and optimized internal geometry reduce heat generation and centrifugal forces. Combined with the lightweight phenolic resin cage, this allows for a very high limiting speed of 83,000 rpm.
- Ultra-Precision: Manufactured to P4 tolerance class, this bearing ensures minimal runout and vibration, which is critical for maintaining accuracy in precision machinery.
- Optimized for Matched Sets: The universal matchable (SU) design allows for flexible mounting in any preload configuration (Face-to-Face, Back-to-Back, or Tandem), simplifying assembly and ensuring consistent performance.
- High-Quality Materials: Constructed from chrome steel for both rings and balls, ensuring high durability, wear resistance, and a long operational life.
71806 CD/P4DGA Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for electric motors requiring ultra-high rotational speeds.
- Robotics: High-accuracy joints and arm assemblies.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
