71913 CD/HCP4ADBC
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71913 CD/HCP4ADBC
Basic Information
System of measurement
Metric
Weight
0.35 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
65 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
26 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
7470 lbf
Radial static load rating
7538 lbf
Limiting speed
36 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
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
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71913 CD/HCP4ADBC Bearing Product Overview & Core Advantages
The 71913 CD/HCP4ADBC is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This matched pair in a back-to-back (DB) arrangement is preloaded to provide high rigidity and stable running characteristics, making it ideal for supporting combined loads (radial and axial). Manufactured to P4A tolerance class, it guarantees superior dimensional and running accuracy. The use of ceramic balls and a phenolic cage contributes to its capabilities as a high-speed bearing with a low thermal expansion coefficient and extended service life.
71913 CD/HCP4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71913 | Bearing series and size designation | Defines the core bearing dimensions: 65mm bore, 90mm OD, 26mm width. |
| CD | Duplex bearing with back-to-back arrangement | Two bearings are universally matched and mounted back-to-back to withstand moment loads and provide high rigidity. |
| HC | Hybrid Ceramic | Indicates the use of ceramic balls, which reduce friction, allow for higher speeds, and offer longer life. |
| P4A | Tolerance Class | Signifies high-precision manufacturing standards for dimensional and running accuracy, superior to ABEC 7. |
| DB | Back-to-Back Mounting | Reinforces the preloaded DB arrangement for optimal moment load capacity and system stiffness. |
| C | Moderate Preload | Specifies the preload level applied to the matched set, balancing rigidity and operational smoothness. |
71913 CD/HCP4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement with a moderate preload (Class C) creates a highly rigid bearing system that effectively resists moment loads and minimizes axial and radial deflection under operation.
- Superior High-Speed Performance: The combination of silicon nitride ceramic balls and a lightweight phenolic resin cage significantly reduces centrifugal forces and friction, enabling a high limiting speed of 36,000 rpm. This makes it an ideal high-speed angular contact bearing.
- Exceptional Load Capacity: With a 15° contact angle and a double-row equivalent design, this bearing set is engineered to handle significant combined radial and axial loads simultaneously.
- Precision and Accuracy: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing ensures precise shaft positioning and minimal runout for high-accuracy applications.
- Reduced Maintenance: The bearing is supplied lubricated and is an open type, allowing for optimal re-lubrication cycles or integration into centralized lubrication systems for long-term, reliable operation.
71913 CD/HCP4ADBC Bearing Typical Application Areas
This precision duplex bearing is specifically designed for high-performance machinery where speed, accuracy, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for electric vehicles and industrial automation.
- Robotics: High-accuracy joints and rotary actuators.
- Aerospace & Defense: Gyroscopes, radar systems, and other precision instrumentation.
