71910 ACD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71910 ACD/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
0.24 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.004mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
25
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4680 lbf
Radial static load rating
4410 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
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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71910 ACD/HCP4ADGA Bearing Product Overview & Core Advantages
The 71910 ACD/HCP4ADGA is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. As a universal matchable (SU) bearing supplied in a pre-lubricated, matched set of two, it delivers outstanding high-speed capability and rigidity. Its ceramic balls and phenolic cage contribute to lower friction and higher limiting speeds, making it ideal for applications where high rigidity and combination loads are present. This bearing is engineered for high reliability in precision machinery.
71910 ACD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle, optimized for supporting combined radial and axial loads. |
| HC | Hybrid Ceramic, indicating the use of ceramic balls for reduced weight, lower friction, and enhanced high-speed performance. |
| P4A | Denotes a high-precision tolerance class (superior to ABEC 7), ensuring extremely tight dimensional and running accuracy. |
| DGA | Universal Matchable (SU) arrangement. Two bearings are supplied as a pre-matched set (DB/DF configuration) for simplified installation and optimal preload. |
71910 ACD/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The double row angular contact design provides superior rigidity, enabling the bearing to handle significant combination loads (radial and axial loads simultaneously) with high stability.
- Exceptional High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a very high limiting speed of 46,000 rpm, minimizing heat generation and power loss.
- Precision and Longevity: Manufactured to a P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for the accuracy and smooth operation of precision spindles. The open design, when used in a properly sealed environment, allows for optimized lubrication management.
- Universal Matchability: Being Universal Matchable (SU), the two bearings in the set can be arranged in back-to-back (DB), face-to-face (DF), or tandem (DT) configurations, offering design flexibility to counteract specific load conditions like moment loads.
71910 ACD/HCP4ADGA Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Motors for robotics and aerospace systems.
- Medical Equipment: High-speed dental handpieces and centrifuges.
