S71924 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71924 ACDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
1.01 kg
Tolerance class
P4A
Seal type
Sealed
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
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
16380 lbf
Radial static load rating
19462 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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S71924 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The S71924 ACDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This sealed bearing features a single, universal matchable design with an extra light preload (Class A), making it ideal for high-speed spindles and precision machinery. Its key advantage lies in its ability to accommodate combined radial and axial loads simultaneously, thanks to a 25° contact angle. The use of ceramic balls and a phenolic cage contributes to lower friction, higher limiting speeds, and extended service life, establishing it as a top-tier solution for high-reliability applications.
Model Code Breakdown
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design, optimized for combined loads. |
| DGA | Designates a specific internal geometry and preload (Extra light / Class A). |
| HC | Hybrid Ceramic, indicating the use of ceramic balls for enhanced performance. |
| P4A | High precision tolerance class, ensuring extremely tight dimensional and running accuracy. |
S71924 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces friction and heat generation. This allows for a higher limiting speed (11,000 rpm), reduced wear, and longer lubrication life compared to all-steel bearings.
- Precision & Rigidity: Manufactured to P4A tolerance class with an extra light preload, this bearing provides superior running accuracy, minimal deflection, and high system rigidity, which is critical for machining precision.
- Optimized Cage Design: The phenolic cage is lightweight and possesses excellent slip characteristics, further contributing to high-speed capability and smooth operation.
- Sealed & Pre-Lubricated: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is effectively maintenance-free within its specified temperature range (-30°C to 110°C).
- High Load Capacity: With a dynamic load rating of 16,380 lbf and a static load rating of 19,462 lbf, it reliably handles significant combined radial and axial loads.
S71924 ACDGA/HCP4A Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Speed Motors: Electric motors and generators requiring minimal runout and high durability.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
- Robotics: Precision joints and actuators where accuracy and reliability are paramount.
