71818 CD/HCP4
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71818 CD/HCP4
Basic Information
System of measurement
Metric
Weight
0.25 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
90 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
115 mm
Outside diameter tolerance
-0.008mm to 0
Width
13 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
31
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
4860 lbf
Radial static load rating
5962 lbf
Limiting speed
20 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1131.53
/ each
In Stock
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71818 CD/HCP4 Bearing Product Overview & Core Advantages
The 71818 CD/HCP4 is a high-precision angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and rigidity. As a single-row bearing with a 15° contact angle, it is optimized to support high-speed operation and significant combined loads (radial and axial). Its construction with ceramic balls and a phenolic cage contributes to lower friction, higher limiting speeds, and extended service life. This bearing is supplied with a P4 (ABEC-7) tolerance class and is preloaded, ensuring superior running accuracy and minimal deflection under operational stresses.
Model Code Breakdown
The model number 71818 CD/HCP4 is decoded as follows:
- 71818: The basic bearing designation, indicating a metric, single-row angular contact ball bearing with a 90mm bore, 115mm OD, and 13mm width.
- CD: Signifies a specific internal design and contact angle (15°) optimized for high-precision applications.
- H: Indicates that the bearing is supplied with a preload to enhance rigidity and minimize axial/radial play.
- C: Denotes the use of a phenolic (polyamide) cage.
- P4: Specifies the tolerance class, equivalent to ABEC-7, denoting very high precision.
71818 CD/HCP4 Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The combination of a 15° contact angle and factory-applied preload provides exceptional system stiffness, critical for minimizing deflection in high-speed spindles and precision machinery.
- Superior High-Speed Capability: The lightweight phenolic cage and low-density ceramic balls reduce centrifugal forces, enabling a high limiting speed and stable operation at elevated RPMs.
- Enhanced Load Capacity: Designed to handle combined loads effectively, with a dynamic load rating of 4860 lbf and a static load rating of 5962 lbf.
- Optimized for Performance: The open seal type allows for customized lubrication strategies, while the P4 tolerance ensures consistent, high-precision performance. The ceramic balls also offer advantages in corrosive or high-temperature environments up to 110 °C.
71818 CD/HCP4 Bearing Typical Application Areas
This bearing is ideally suited 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 Robotics: Arm joints and high-accuracy rotary axes.
- Medical Equipment: Dental handpieces and imaging scanner rotors.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units.
- High-Frequency Motors and Spindles: Where low vibration and high rotational accuracy are required.
