71807 ACD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71807 ACD/P4DGA
Basic Information
System of measurement
Metric
Weight
0.056 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.004mm to 0
Width
14 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1580 lbf
Radial static load rating
1834 lbf
Limiting speed
56 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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71807 ACD/P4DGA Bearing Product Overview & Core Advantages
The 71807 ACD/P4DGA is a super-precision angular contact ball bearing designed for applications demanding the highest levels of accuracy and performance. As a universally matchable (SU) bearing supplied in a set of two, it is engineered to accommodate combined loads—significant radial loads and axial loads in one direction—simultaneously. Its P4 tolerance class and extra light preload (Class A) ensure exceptional running accuracy, low noise, and minimal heat generation, making it ideal for high-speed and high-rigidity spindle arrangements.
71807 ACD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71807 ACD/P4DGA provides a detailed technical specification:
- 71807: Basic model number denoting a super-precision, light series angular contact ball bearing.
- ACD: Contact Angle of 25° and a specific internal design optimized for universal matching.
- P4: Indicates the tolerance class, corresponding to ISO P4 / ABEC 7 precision levels for superior dimensional and running accuracy.
- DGA: Signifies the bearing is Lubricated with a high-performance grease suitable for the specified temperature range.
71807 ACD/P4DGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust construction provide high rigidity, enabling the bearing to handle demanding combined loads effectively.
- Super-Precision Performance: Manufactured to P4 tolerance standards, this bearing guarantees minimal runout and vibration, which is critical for maintaining precision in machining and positioning.
- High-Speed Capability: The lightweight phenolic resin cage and optimized internal geometry contribute to low friction and stable operation at high rotational speeds, with a limiting speed of 56,000 rpm.
- Universal Matchability (SU): Bearings in this set are universally matchable, allowing for flexible mounting arrangements (face-to-face, back-to-back, or tandem) to achieve the desired preload and stiffness without selective assembly.
- Ready-to-Install: The bearings are pre-lubricated, ensuring immediate operation and simplifying the installation process.
71807 ACD/P4DGA Bearing Typical Application Areas
This bearing is specified for high-performance applications where precision and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM electric motors.
- Medical Equipment: Centrifuges and high-speed dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
