71905 CE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71905 CE/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
0.072 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
42 mm
Outside diameter tolerance
-0.004mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
16
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1960 lbf
Radial static load rating
1260 lbf
Limiting speed
100.5 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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71905 CE/HCP4ADGA Bearing Product Overview & Core Advantages
The 71905 CE/HCP4ADGA is a precision angular contact ball bearing engineered for applications demanding exceptional accuracy and high-speed performance. As a universal matchable (SU) bearing supplied in a pre-set pair, it is designed to accommodate combined loads (radial and axial) simultaneously. Its core advantages include superior running accuracy due to the P4A tolerance class, high-speed capability enabled by the phenolic cage and ceramic balls, and reliable operation across a wide temperature range. This bearing is ideal for high-reliability, high-precision machinery.
71905 CE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CE | Indicates a 15° contact angle. |
| HC | Refers to the Hybrid Ceramic construction, featuring ceramic balls and steel rings. |
| P4A | Denotes a very high precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| DGA | Signifies a Universal Matchable (SU) pair with Extra Light (A) preload, ready for installation as a duplex set. |
71905 CE/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and universal matching of the pair enable the bearing arrangement to support significant combined radial and axial loads from both directions, providing high system rigidity.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls reduces centrifugal forces and friction, allowing for a very high limiting speed of 100,500 rpm. This makes it an excellent high-speed bearing.
- Reduced Heat Generation & Long Service Life: Hybrid ceramic construction provides superior lubrication retention, reduced wear, and extended service life, especially in high-speed applications.
- Precision Operation: Manufactured to P4A tolerance class with a 25 mm bore diameter, this bearing ensures minimal runout and vibration for smooth, precise rotation.
71905 CE/HCP4ADGA Bearing Typical Application Areas
- High-Frequency Spindles for CNC machining centers and PCB drilling machines
- Precision Instrumentation and medical device rotors
- High-Speed Motors and turbo-molecular pumps
- Aerospace auxiliary systems and instrumentation
