71900 ACE/P4ADT
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71900 ACE/P4ADT
Basic Information
System of measurement
Metric
Weight
0.018 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
10 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
22 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
11
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
702 lbf
Radial static load rating
338 lbf
Limiting speed
165 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71900 ACE/P4ADT Bearing Product Overview & Core Advantages
The 71900 ACE/P4ADT is a super-precision angular contact ball bearing designed for the most demanding applications. Engineered as a duplex tandem (DT) arrangement, this matched pair is preloaded to deliver exceptional system rigidity and axial load capacity in a compact footprint. Its P4A tolerance class ensures ultra-high running accuracy, making it ideal for high-speed spindles and other precision machinery requiring uncompromising performance and reliability.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71900 | Basic bearing series and size designation. |
| ACE | Specific internal design with a 25° contact angle for optimal axial load capacity. |
| P4A | Super-precision tolerance class, exceeding ABEC 7/ISO P4 standards for superior running accuracy. |
| DT | Duplex Tandem arrangement. Two bearings are mounted together to multiply axial load capacity in one direction. |
71900 ACE/P4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Axial Load Capacity: The duplex tandem (DT) arrangement with preload creates an exceptionally stiff bearing system capable of handling heavy axial loads in one direction, which is critical for applications like machine tool spindles.
- Super-Precision Performance: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, enabling high rotational accuracy and superior surface finishes in machined parts.
- High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, while the open design and optimized internal geometry contribute to a high limiting speed of 165,000 rpm.
- Optimized Material & Design: Constructed from high-grade chrome steel for both rings and balls, ensuring high durability and long service life under demanding operating conditions.
71900 ACE/P4ADT Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications, including:
- High-Frequency Machine Tool Spindles (e.g., for milling, grinding, and drilling)
- Precision Grinding Spindles
- High-Speed Motors
- Medical and Dental Handpiece Drives
- Other precision machinery requiring super-precision, high rigidity, and high-speed operation.
