71801 CD/P4DBA
71800 Series Super Precision Angular Contact Ball Bearings
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71801 CD/P4DBA Bearing Product Overview & Core Advantages
The 71801 CD/P4DBA is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. This duplex back-to-back (DB) matched set features an Extra Light (Class A) preload, providing superior system stiffness and precise rotational accuracy. Its compact design, with a 12 mm bore, is engineered to handle combined loads efficiently, making it an ideal choice for high-speed, high-precision machinery where reliability is paramount.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71801 | Basic bearing designation: 12 mm bore, 21 mm OD. |
| C | 15° contact angle. |
| D | Duplex Back-to-Back (DB) matched arrangement. |
| P4 | High Precision tolerance class (superior to ABEC 7). |
| DBA | Specific preload designation: Extra Light (Class A) preload. |
71801 CD/P4DBA Bearing Structural Features & Performance Benefits
High Rigidity & Axial Stiffness: The duplex back-to-back (DB) configuration creates a wide, rigid support system that significantly increases resistance to moment loads, enhancing overall machine tool stability and precision.
Superior Load Capacity: The 15° contact angle is optimized to handle substantial combined radial and axial loads simultaneously, a critical requirement in precision spindles.
High-Speed Capability: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to the high limiting speed of 110,000 rpm. The bearing comes pre-lubricated for immediate high-speed operation.
Precision Performance: Manufactured to P4 tolerance class with a Class A preload, this bearing ensures minimal runout, low vibration, and exceptional rotational accuracy for the most demanding applications.
71801 CD/P4DBA Bearing Typical Application Areas
This high-precision bearing is engineered for advanced applications where speed, accuracy, and rigidity are non-negotiable. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling spindles.
- Precision Instrumentation: High-frequency spindles for PCB drilling and semiconductor manufacturing equipment.
- High-Speed Motors: Spindles for routers, dental handpieces, and other small, high-RPM electric motors.
