71910 ACE/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71910 ACE/P4A
Basic Information
System of measurement
Metric
Weight
0.13 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.007mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
21
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2722 lbf
Radial static load rating
1834 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
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
Price:
$ 404.58
/ each
In Stock
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71910 ACE/P4A Bearing Product Overview & Core Advantages
The 71910 ACE/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to P4 (ABEC-7) tolerance class, this bearing is optimized to handle combined loads, carrying significant axial loads in one direction alongside radial loads. Its phenolic cage and 25° contact angle contribute to superior high-speed performance and operational stability, making it an ideal choice for demanding, high-accuracy spindle systems.
71910 ACE/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 71910 ACE/P4A is decoded as follows:
- 71910: Denotes the bearing series and size (50mm bore, 72mm OD, 12mm width).
- ACE: Indicates a 25° contact angle and optimized internal design for high-speed operation.
- P4A: Specifies the tolerance class P4 (ABEC-7), ensuring extremely tight dimensional and running accuracy.
71910 ACE/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance standards, the bearing ensures minimal runout and vibration, which is critical for precision machining and high-speed applications.
- Optimized for High Speeds: The lightweight phenolic cage reduces centrifugal forces, enabling a high limiting speed of 36,000 rpm. The 25° contact angle provides an excellent balance between radial and axial load capacity.
- Superior Load Capacity: With a dynamic load rating of 2722 lbf and a static load rating of 1834 lbf, this bearing reliably handles combined loads in high-performance environments.
- Pre-lubricated and Open Design: The open seal type allows for custom lubrication regimes, while the pre-lubricated state ensures immediate operational readiness.
71910 ACE/P4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for:
- Machine Tool Spindles
- High-Speed Motors and Grinding Spindles
- Precision Instrumentation
- Robotic Arm Joints and Precision Gearboxes
