71814 CD/P4DGB
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71814 CD/P4DGB
Basic Information
System of measurement
Metric
Weight
0.27 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
70 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
31
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
5062 lbf
Radial static load rating
7200 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 471.5
/ each
In Stock
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71814 CD/P4DGB Bearing Product Overview & Core Advantages
The 71814 CD/P4DGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4 tolerance class, it offers superior dimensional and running accuracy. Its universal matchable (SU) design allows two bearings to be paired in a back-to-back or face-to-face arrangement, simplifying mounting and enabling optimal performance under combined loads (radial and axial). Pre-loaded with a light preload (Class B), this bearing is ideal for high-speed spindles and other precision machinery requiring high rigidity and minimal runout.
71814 CD/P4DGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71814 | Basic bearing designation, indicating a metric, single-row angular contact ball bearing with a 70mm bore, 90mm OD, and 20mm width. |
| CD | Indicates a 15° contact angle and a specific internal design optimized for high-speed operation and universal matching. |
| P4 | Denotes a high-precision tolerance class superior to ABEC-7, ensuring extremely tight dimensional and running accuracy. |
| DGB | Signifies that the bearing is Universal Matchable (SU) and supplied as part of a matched set of 2 bearings, ready for duplex mounting. |
71814 CD/P4DGB Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance with a 15° contact angle, this bearing provides exceptional running accuracy and stiffness, which is critical for minimizing deflection in high-speed spindles.
- Optimized for Combined Loads: The angular contact design efficiently supports combined radial and axial loads in one direction. The universal matchable (SU) feature allows pairs to be arranged to handle bidirectional axial loads and increase overall system rigidity.
- High-Speed Capability: The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and stable operation at the high limiting speed of 28,000 rpm. The standard light preload ensures consistent performance at speed.
- Superior Material Construction: Made from high-grade chrome steel for both rings and balls, the bearing ensures high durability, wear resistance, and a long operational life under demanding conditions.
71814 CD/P4DGB Bearing Typical Application Areas
This precision bearing is ideally suited for applications where high speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy joints and arm assemblies.
- High-Frequency Motors and Spindles: Where minimal runout and vibration are required.
- Medical and Dental Equipment: High-speed handpieces and imaging devices.
- Aerospace and Defense Systems: Gyroscopes, radar equipment, and navigation systems.
