71910 ACEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71910 ACEGA/P4A
Basic Information
System of measurement
Metric
Weight
0.13 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
72 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
7.144 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2722 lbf
Radial static load rating
1834 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
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:
$ 128.35
/ each
In Stock
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71910 ACEGA/P4A Bearing Product Overview & Core Advantages
The 71910 ACEGA/P4A is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As a single bearing with a 25° contact angle and Extra Light (A) preload, it is engineered to support combined loads, primarily handling high radial loads and axial loads in one direction. Manufactured to the exacting P4A tolerance class, it delivers exceptional running accuracy, low noise, and low vibration, making it ideal for high-precision spindles and other critical machinery where performance and reliability are paramount.
71910 ACEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 71910 ACEGA/P4A is decoded as follows:
- 71910: Denotes the bearing series and size (10mm bore x 72mm OD x 12mm width).
- AC: Angular Contact design with a 25° contact angle.
- E: Optimized internal design for high-speed operation.
- GA: Indicates a Universal Matchable (SU) bearing supplied in a set of two (Number of bearings in matched set: 2). These bearings are selectively matched to provide a specific preload or clearance when mounted together in a face-to-face or back-to-back arrangement.
- P4A: Specifies the tolerance class, which exceeds ABEC 7/ISO P4 standards, ensuring ultra-precision dimensions and running accuracy.
71910 ACEGA/P4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of a phenolic resin cage and an optimized internal (E-type) design significantly reduces centrifugal forces and friction, enabling a high limiting speed of 46,000 rpm.
- Super-Precision & Rigidity: Manufactured to P4A tolerances with an Extra Light preload, this bearing provides maximum shaft guidance, minimal runout, and high system rigidity for superior machining accuracy.
- High Load Capacity: The 25° contact angle and robust construction enable high radial dynamic load rating (2722 lbf) and static load rating (1834 lbf), effectively managing combined loads.
- Universal Matching: The GA suffix signifies that the bearing is supplied as a universally matchable pair. This allows for simplified installation and ensures consistent, predictable preload and performance in duplex configurations.
- Material Quality: Constructed from high-grade chrome steel for both rings and balls, ensuring long service life and consistent performance under high-stress conditions.
71910 ACEGA/P4A Bearing Typical Application Areas
This precision angular contact bearing is predominantly used in applications requiring high speed, high precision, and exceptional rigidity.
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling spindles and other high-frequency motor spindles.
- High-Speed Robotics: Arm joints and drive units requiring precise motion control.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
- Aerospace & Defense: Gyroscopes, radar systems, and other precision instrumentation.
