71909 CE/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71909 CE/HCP4ADBA
Basic Information
System of measurement
Metric
Weight
0.23 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
68 mm
Outside diameter tolerance
-0.004mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3780 lbf
Radial static load rating
3082 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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71909 CE/HCP4ADBA Bearing Product Overview & Core Advantages
The 71909 CE/HCP4ADBA is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex back-to-back (DB) matched set delivers superior high rigidity and stability, enabling it to handle combined loads—significant radial and bidirectional axial loads simultaneously. Manufactured to the exacting P4A tolerance class, it features a 15° contact angle and ceramic balls for outstanding high-speed performance and extended service life. Its pre-lubricated and open design makes it an ideal, high-reliability component for precision machinery.
Model Code Breakdown
| Suffix Code | Technical Meaning |
|---|---|
| CE | Indicates a duplex bearing with a specific preload and matching. |
| HC | Refers to the hybrid ceramic construction (ceramic balls with steel rings). |
| P4A | Denotes a high-precision tolerance class exceeding ABEC 7 standards. |
| DB | Specifies the Back-to-Back arrangement of the matched set. |
| A | Signifies an Extra Light preload for minimal friction and high-speed operation. |
71909 CE/HCP4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a rigid bearing system that effectively resists moment loads, making it exceptionally stable under combined loads.
- Superior High-Speed Capability: The combination of hybrid ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a very high limiting speed of 41,000 rpm.
- Enhanced Load Capacity: The 15° contact angle is optimized to handle substantial bidirectional axial loads in addition to high radial loads.
- Precision Performance: Manufactured to P4A tolerance class with a chrome steel ring material, this bearing ensures minimal runout and vibration for ultra-precise rotational accuracy.
- Extended Service Life: Ceramic balls offer superior wear resistance, lower operating temperatures, and longer life, especially in high-speed applications.
71909 CE/HCP4ADBA Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, speed, and rigidity are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors and Spindles: Where extreme rotational speeds are required.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and navigation equipment.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
