S71926 ACDGC/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71926 ACDGC/HCP4A
Basic Information
System of measurement
Metric
Weight
1.31 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
130 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
180 mm
Outside diameter tolerance
-0.004mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
27
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
19598 lbf
Radial static load rating
22950 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
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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S71926 ACDGC/HCP4A Bearing Product Overview & Core Advantages
The S71926 ACDGC/HCP4A is a high-precision double row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and reliability. This sealed bearing features a 25° contact angle and Moderate (Class C) preload, enabling it to simultaneously handle significant combined radial and axial loads from both directions. Its compact design, utilizing ceramic balls and a phenolic cage, delivers superior high-speed performance, reduced weight, and excellent operational stability, making it ideal for high-rigidity spindle systems.
S71926 ACDGC/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle. |
| GC | Specifies a Moderate preload (Class C) for optimal rigidity and running accuracy. |
| HC | Indicates the use of Hybrid Ceramic balls (Silicon Nitride), offering benefits like higher speed capability and reduced weight. |
| P4A | Denotes an ultra-high precision tolerance class, exceeding ABEC 7/ISO P4 standards, ensuring minimal runout and vibration. |
S71926 ACDGC/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design and Class C preload provide superior stiffness, effectively resisting deformation under complex combined loads. With a dynamic load rating of 19,598 lbf and static load rating of 22,950 lbf, it delivers robust performance.
- Exceptional High-Speed Performance: The combination of low-density ceramic balls and a lightweight phenolic resin cage significantly reduces centrifugal forces, enabling a high limiting speed of 11,000 rpm. This design minimizes friction and heat generation.
- Long-Term Reliability & Maintenance-Free Operation: The integral seals retain the factory-applied grease lubrication and effectively exclude contaminants. This sealed-for-life construction ensures consistent performance across a wide temperature range from -30°C to 110°C.
- Universal Matchability (SU): This bearing is universally matchable, allowing it to be mounted in sets (back-to-back, face-to-face, or tandem) with other SU-coded bearings without selective assembly to achieve specific preload or rigidity characteristics.
S71926 ACDGC/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance machinery where accuracy, speed, and rigidity are critical. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM electric motors.
- Medical Equipment: Centrifuges and high-speed dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
