71901 ACD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71901 ACD/P4ADBA
Basic Information
System of measurement
Metric
Weight
0.02 kg
Tolerance class
P4A
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
25 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
13
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
936 lbf
Radial static load rating
531 lbf
Limiting speed
140 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
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 175.27
/ each
In Stock
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71901 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 71901 ACD/P4ADBA is a super-precision angular contact ball bearing designed for the most demanding applications. This duplex back-to-back (DB) matched pair delivers exceptional rotational accuracy and system rigidity. Its configuration is optimized to handle combined loads (radial and axial) simultaneously, making it ideal for high-speed spindles and precision machinery where maximum stability and minimal runout are critical. The P4A tolerance class and extra light preload (Class A) ensure superior performance in high-precision environments.
71901 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Basic bearing series and size designation (12mm bore, 24mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (Two bearings supplied as a matched set). |
| DB | Back-to-Back mounting arrangement for high moment rigidity. |
| P4A | Super-precision tolerance class, tighter than ABEC 7. |
| Open | No seal/shield, allowing for optimal high-speed performance and custom lubrication schemes. |
71901 ACD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The back-to-back duplex (DB) arrangement creates a wide effective spread, significantly increasing the system's resistance to moment loads and ensuring exceptional operational stability.
- Superior Load Capacity: The 25° contact angle is optimized to handle substantial combined radial and axial loads efficiently, a hallmark of angular contact ball bearings.
- Exceptional High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, while the open design minimizes friction, collectively enabling a high limiting speed of 140,000 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with an extra light preload, this bearing guarantees minimal vibration and ultra-precise running accuracy for critical applications.
- Premium Materials: Constructed from chrome steel for both rings and balls, ensuring high durability, wear resistance, and consistent performance.
71901 ACD/P4ADBA Bearing Typical Application Areas
This precision bearing is engineered for high-performance machinery, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy servo motors.
- Medical Equipment: Dental handpieces and surgical drill spindles.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and navigation instruments.
- High-Frequency Spindles: PCB drilling and routing machines.
