71811 CDGA/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71811 CDGA/P4
Basic Information
System of measurement
Metric
Weight
0.081 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.004mm to 0
Width
9 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
29
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2272 lbf
Radial static load rating
2430 lbf
Limiting speed
34 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
No drawings available at the moment, will be launched soon
Price:
$ 90.46
/ each
In Stock
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71811 CDGA/P4 Bearing Product Overview & Core Advantages
The 71811 CDGA/P4 is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing with an Extra Light (A) preload and P4 tolerance class, it delivers superior running accuracy and minimal vibration. Its compact design, with a 9 mm width, makes it ideal for space-constrained, high-precision spindles and other machinery requiring high rigidity and reliable operation under combined loads.
71811 CDGA/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CDGA | Indicates a Universal Matchable (SU) bearing with a 15° contact angle and Extra Light (A) preload. This "C" designation signifies it is one of a set of three bearings (set of 3) manufactured to be universally interchangeable when mounted in a duplex arrangement. |
| P4 | Denotes the tolerance class, signifying superior dimensional and running accuracy exceeding standard ABEC-7 specifications. This is critical for high-speed, high-precision applications. |
71811 CDGA/P4 Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4 tolerance with an Extra Light preload, this bearing ensures minimal runout and high system stiffness, essential for precise positioning and reduced deflection under load.
- Optimized for High Speeds: The phenolic resin cage is lightweight and robust, enabling stable operation at the high limiting speed of 34,000 rpm. The open design and factory-applied lubrication facilitate efficient heat dissipation.
- Superior Load Capacity: The 15° contact angle is engineered to support significant combined loads (radial and axial), with a dynamic load rating of 2272 lbf and a static load rating of 2430 lbf.
- Universal Matching Capability (SU): As part of a universally matchable set, these bearings can be mounted in any combination (back-to-back, face-to-face, or tandem) without a loss in preload, offering exceptional design flexibility.
71811 CDGA/P4 Bearing Typical Application Areas
This bearing is engineered for the most demanding precision applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives: High-frequency motor spindles and servo drives.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and navigation instruments.
- Medical Equipment: Dental handpieces and high-speed surgical tools.
