71808 CDGB/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71808 CDGB/P4
Basic Information
System of measurement
Metric
Weight
0.031 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
52 mm
Outside diameter tolerance
-0.004mm to 0
Width
7 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
29
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1098 lbf
Radial static load rating
1102 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
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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71808 CDGB/P4 Bearing Product Overview & Core Advantages
The 71808 CDGB/P4 is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing from a universally matchable (SU) set, it offers outstanding versatility for preloaded arrangements. Its key characteristics include a light preload (Class B) and a 15° contact angle, enabling it to handle combined radial and axial loads simultaneously. Manufactured to P4 tolerance class, this bearing is ideal for high-precision, high-reliability machinery where rigidity and minimal runout are critical.
71808 CDGB/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71808 | Basic bearing series and size designation (40mm bore, 52mm OD, 7mm width). |
| C | 15° nominal contact angle. |
| D | Enhanced internal design for high-precision applications. |
| GB | Light preload (Class B). |
| /P4 | Dimensional and running accuracy to ISO P4 tolerance class, superior to standard ABEC 7. |
71808 CDGB/P4 Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The optimized internal geometry, combined with P4 tolerance class manufacturing, ensures exceptional dimensional stability and minimizes deflection under load, providing the high rigidity required for precise spindle applications.
- Superior High-Speed Capability: The phenolic resin cage is lightweight and exhibits excellent performance at high rotational speeds, contributing to a limiting speed of 56,000 rpm. The 15° contact angle is ideal for high-speed operation where axial loads are present.
- Optimized Load Capacity: The design is engineered to support significant combined loads. With a dynamic load rating of 1098 lbf and a static load rating of 1102 lbf, it offers reliable performance in demanding conditions.
- Universal Matching Design (SU): As part of a universally matchable set, individual 71808 CDGB/P4 bearings can be mounted together in any combination to achieve a specific preload without selective assembly, simplifying installation and inventory.
71808 CDGB/P4 Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for CNC applications.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
- Robotics: Precision joints and arm assemblies requiring high rigidity and accuracy.
