71807 ACDGA/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71807 ACDGA/P4
Basic Information
System of measurement
Metric
Weight
0.028 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
7 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
981 lbf
Radial static load rating
911 lbf
Limiting speed
56 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
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
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In Stock
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71807 ACDGA/P4 Bearing Product Overview & Core Advantages
The 71807 ACDGA/P4 is a single-row angular contact ball bearing designed for applications demanding high precision and exceptional rotational accuracy. Characterized by its compact 7mm width and manufactured to P4 tolerance class, this bearing is engineered to handle combined loads, primarily thrust loads, with high reliability. Its phenolic resin cage and universal matchable (SU) design enable flexible mounting arrangements in high-speed, high-rigidity systems.
71807 ACDGA/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71807 | Basic bearing series and size designation (35mm bore, 47mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| DGA | Duplex arrangement designation (Universal Matchable - SU). |
| P4 | High precision tolerance class, ensuring minimal runout and superior running accuracy. |
71807 ACDGA/P4 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust construction are optimized to support significant thrust loads and moderate radial loads, providing stable and rigid shaft support.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling a high limiting speed of 56,000 rpm. This makes it ideal for high-speed spindles.
- Precision Engineering: Manufactured to P4 tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width, ensuring predictable performance and precise fit in demanding applications.
- Universal Matching: As a Universal Matchable (SU) bearing, it can be paired with another identical bearing in various preload configurations (back-to-back, face-to-face, or tandem) to achieve the desired system stiffness.
71807 ACDGA/P4 Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Robotic Drives and Actuators
- Medical and Dental Handpiece Drives
