71924 ACEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71924 ACEGA/P4A
Basic Information
System of measurement
Metric
Weight
1.1 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
120 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
165 mm
Outside diameter tolerance
-0.004mm to 0
Width
22 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
14.288 mm
Ball quantity
24
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
10102 lbf
Radial static load rating
8550 lbf
Limiting speed
10 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
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71924 ACEGA/P4A Bearing Product Overview & Core Advantages
The 71924 ACEGA/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this single-row bearing features an extra light preload (Class A) and is universally matchable (SU), allowing for precise axial play adjustment when mounted in pairs. Its optimized 25° contact angle enables it to support combined radial and axial loads simultaneously, making it an ideal solution for high-speed spindles and precision machinery where uncompromising performance is critical.
71924 ACEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71924 | Basic bearing series and size designation (120mm bore, 165mm OD, 22mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| EGA | Specific internal design and universal matching (SU) configuration for optimized pairing. |
| P4A | Indicates a high-precision tolerance class with enhanced running accuracy requirements. |
71924 ACEGA/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4A tolerance standards with extremely tight dimensional tolerances on the bore, outside diameter, and width. This ensures minimal runout and superior system stability under load.
- Optimized Load Capacity: The 25° contact angle is engineered to efficiently handle significant combined radial and axial loads. With a dynamic load rating of 10,102 lbf and a static load rating of 8,550 lbf, it offers reliable performance in strenuous conditions.
- High-Speed Capability: The lightweight and robust phenolic resin cage minimizes centrifugal forces, contributing to a high limiting speed of 10,000 rpm. This makes it suitable for high-rotation applications.
- Precision Matching: As a Universal Matchable (SU) bearing, it can be paired with another identical bearing to achieve a specific preload or axial clearance without selective mounting, simplifying installation and enhancing operational accuracy.
- Superior Materials: Constructed from high-grade chrome steel for both rings and balls, ensuring long service life and consistent performance across a temperature range of -30°C to 110°C.
71924 ACEGA/P4A Bearing Typical Application Areas
This bearing is specifically engineered for high-performance machinery, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Applications requiring minimal backlash and high positional accuracy.
- High-Frequency Motors and Spindles: Where rapid acceleration and deceleration are common.
- Medical and Laboratory Equipment: Centrifuges and other precision instruments.
- Robotics and Automation: High-accuracy rotary joints and arm assemblies.
