S71930 ACD/HCP4ATGA
Hybrid Ceramic Super Precision Bearings
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S71930 ACD/HCP4ATGA Bearing Product Overview & Core Advantages
The S71930 ACD/HCP4ATGA is a precision angular contact ball bearing engineered for the most demanding high-performance applications. Operating under the stringent P4A tolerance class, it delivers exceptional rotational accuracy and running smoothness. A key feature is its Universal Matchable (SU) designation, allowing three bearings to be precisely preloaded against each other in a set to achieve optimal system rigidity. Its construction with a ceramic ball and phenolic cage is optimized for high-speed operation, enabling a limiting speed of 11,000 rpm. This bearing is designed to handle combined loads efficiently, supporting significant radial loads and thrust loads in one direction simultaneously, making it an ideal, compact solution for spindles requiring high reliability and high rigidity.
S71930 ACD/HCP4ATGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S7 | Bearing Series | Denotes a high-precision angular contact ball bearing series. |
| 1930 | Bore & Series Size | Specifies the bore diameter of 150 mm and the cross-sectional dimensions. |
| AC | Contact Angle | Indicates a 25° contact angle, optimized for carrying high thrust loads. |
| D | Internal Design | Refers to specific internal geometry and optimized internal clearance. |
| HC | Hybrid Ceramic | Signifies the use of ceramic balls, which reduce friction, weight, and heat generation for superior high-speed performance. |
| P4A | Tolerance Class | Denotes an ultra-high precision grade with very tight dimensional and running accuracy tolerances. |
| TGA | Grease & Cage | Indicates the use of a phenolic cage and a specific high-performance grease lubrication suitable for the specified temperature range. |
S71930 ACD/HCP4ATGA Bearing Structural Features & Performance Benefits
- High Rigidity and Universal Matching: The Universal Matchable (SU) design allows for the assembly of multiple bearings (3 in a set) with a pre-defined preload (Extra light / Class A). This creates an exceptionally rigid bearing system that minimizes deflection under complex combined loads.
- Superior High-Speed Capability: The combination of lightweight ceramic balls and a robust phenolic cage significantly reduces centrifugal forces and ensures stable operation at the high limiting speed of 11,000 rpm.
- High Load Capacity: With a 25° contact angle and premium chrome steel rings, this bearing offers high radial dynamic load rating (52,650 lbf) and radial static load rating (84,375 lbf), making it capable of handling demanding combined loads.
- Sealed and Pre-Lubricated: As a sealed and grease-lubricated unit, it is protected from contamination and is effectively maintenance-free for its service life within the operating temperature range of -30°C to 110°C.
S71930 ACD/HCP4ATGA Bearing Typical Application Areas
The S71930 ACD/HCP4ATGA is ideally suited for high-precision, high-speed machinery where system rigidity and accuracy are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for integrally mounted motor applications.
- Robotics: High-accuracy joints and rotary actuators.
