71906 ACE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71906 ACE/HCP4A
Basic Information
System of measurement
Metric
Weight
0.045 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
30 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.006mm to 0
Width
9 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
18
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1215 lbf
Radial static load rating
686 lbf
Limiting speed
70 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:
$ 236.06
/ each
In Stock
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71906 ACE/HCP4A Bearing Product Overview & Core Advantages
The 71906 ACE/HCP4A is a single-row angular contact ball bearing engineered for applications demanding ultra-high precision and exceptional rotational accuracy. Positioned in the P4 (ABEC-7) tolerance class, it is designed to simultaneously handle significant radial loads and axial loads in one direction. Its compact design, featuring a 9 mm width and a 25° contact angle, provides high rigidity and is ideally suited for high-speed spindles and other precision machinery where space is limited and performance is critical.
71906 ACE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACE | Indicates a 25° contact angle and a specific internal design optimized for high precision and high-speed operation. |
| HC | Signifies the use of Hybrid Ceramic components, specifically ceramic balls, which reduce friction, heat generation, and wear. |
| P4A | Denotes a P4 (ABEC-7) tolerance class with additional running accuracy requirements, ensuring minimal vibration and superior performance. |
71906 ACE/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, allowing for higher limiting speeds (70,000 rpm). This hybrid design also provides superior resistance to electrical erosion and operates effectively with less lubrication.
- High Rigidity and Load Capacity: The 25° contact angle is optimized to support substantial combined radial and axial loads. The phenolic resin cage ensures stable operation under high-speed and high-temperature conditions.
- Ultra-Precision Performance: Manufactured to P4 tolerance class, this bearing guarantees tight dimensional control (bore diameter tolerance: -0.005mm to 0) for applications requiring extreme running accuracy and minimal rotational vibration.
- Pre-Lubricated for Immediate Use: The bearing comes pre-lubricated, facilitating immediate installation and initial operation within its specified temperature range of -30° to 110°C.
71906 ACE/HCP4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for:
- High-Frequency CNC Spindles and Machine Tool Mandrels
- Precision Grinding Spindles
- High-Speed Dental and Medical Handpieces
- Aerospace Instrumentation and Gyroscopes
- High-Performance Robotic Drives and Servo Motors
