71918 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71918 CD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.47 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
125 mm
Outside diameter tolerance
-0.009mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
26
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
10688 lbf
Radial static load rating
11475 lbf
Limiting speed
19 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:
$ 1090.38
/ each
In Stock
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71918 CD/HCP4A Bearing Product Overview & Core Advantages
The 71918 CD/HCP4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and performance. Engineered to accommodate combined loads (simultaneous radial and axial loads), this bearing features a 15° contact angle optimized for high-speed operation. Its P4 (ABEC-7) tolerance class ensures minimal runout and vibration, making it ideal for high-rigidity applications. The combination of a ceramic ball and phenolic cage contributes to reduced friction, lower operating temperatures, and extended service life, particularly in demanding environments.
71918 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Benefit/Feature |
|---|---|---|
| CD | High Contact Angle (15°), Duplex Arrangement | Optimized for high axial load capacity and high-speed operation. |
| HC | Hybrid Ceramic (Silicon Nitride Balls) | Reduced weight, lower friction, higher speed capability, and longer life. |
| P4 | Precision Tolerance Class (ABEC-7) | Superior running accuracy, reduced vibration, and enhanced system performance. |
71918 CD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The use of ceramic (Si3N4) balls with a steel ring significantly reduces centrifugal forces, enabling higher limiting speeds (19,000 rpm). This combination also provides superior electrical resistance and operation in marginal lubrication conditions.
- Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability at high speeds and contributes to smooth operation and reduced cage wear.
- Precision Engineering: Manufactured to P4 tolerance with tight dimensional controls on bore, outside diameter, and width, ensuring predictable and precise performance in the most demanding high-precision assemblies.
- Optimized Load Capacity: The 15° contact angle and duplex design provide high rigidity and are capable of handling significant combined loads, making the bearing exceptionally stable under complex loading conditions.
71918 CD/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers where precision, speed, and rigidity are critical.
- Precision Robotics: Arm joints and rotary actuators requiring high accuracy and dynamic response.
- High-Frequency Spindles: PCB drilling, dental handpieces, and other applications demanding extreme rotational speeds.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other instrumentation requiring reliable performance under challenging conditions.
