71901 CE/HCPA9ADBA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71901 CE/HCPA9ADBA
Basic Information
System of measurement
Metric
Weight
0.018 kg
Tolerance class
PA9A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
12 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
24 mm
Outside diameter tolerance
-0.004mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
776 lbf
Radial static load rating
396 lbf
Limiting speed
165 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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71901 CE/HCPA9ADBA Bearing Product Overview & Core Advantages
The 71901 CE/HCPA9ADBA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. This duplex back-to-back (DB) matched set is pre-loaded to Extra light (Class A) specifications, ensuring high system rigidity and minimal runout. A key advantage is its ability to support combined loads (radial and axial) simultaneously. The use of ceramic balls and a phenolic cage contributes to lower friction, higher limiting speeds, and extended service life, making it ideal for high-reliability, high-precision environments.
71901 CE/HCPA9ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CE | Indicates a duplex bearing with a specific internal design and contact angle. |
| HCPA9A | Specifies the high-precision tolerance class PA9A and the Extra light (A) preload. |
| DBA | Denotes the Duplex Back-to-Back arrangement of the matched set. |
71901 CE/HCPA9ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The duplex back-to-back (DB) arrangement provides superior rigidity against moment loads and precise shaft positioning, critical for machine tool spindles. The PA9A tolerance class ensures extremely tight dimensional control.
- High-Speed Capability: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage enables a very high limiting speed of 165,000 rpm, minimizing heat generation and power loss.
- Optimized Load Capacity: The 15° contact angle is optimized to handle significant combined radial and axial loads efficiently.
- Pre-lubricated & Ready-to-Install: The bearing is lubricated from the factory, simplifying installation and ensuring immediate, reliable operation within its specified temperature range.
71901 CE/HCPA9ADBA Bearing Typical Application Areas
This high-performance duplex angular contact bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring extreme precision and rigidity.
- High-Frequency Spindles: PCB drilling and precision engraving machines.
- Precision Instrumentation: Gyroscopes, optical encoders, and medical devices.
- Robotics: High-precision joints and arm assemblies.
