S7018 ACE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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S7018 ACE/HCP4ADGA Bearing Product Overview & Core Advantages
The S7018 ACE/HCP4ADGA is a super-precision angular contact ball bearing engineered for the most demanding high-performance applications. As a universal matchable (SU) bearing supplied in a set of two, it is designed to accommodate combined loads (radial and axial) simultaneously with exceptional accuracy and rigidity. Its construction featuring ceramic balls and a P4A tolerance class ensures superior high-speed performance, reduced heat generation, and extended service life, making it an ideal choice for ultra-precise spindles and machinery requiring the highest levels of reliability and rotational accuracy.
S7018 ACE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S7018 | Basic bearing series and size designation. | Indicates a 90mm bore, 140mm OD, 48mm width super-precision bearing. |
| ACE | 25° contact angle, Extra light preload (Class A). | Optimizes stiffness and minimizes friction and heat at high speeds. |
| HC | Hybrid Ceramic construction. | Silicon Nitride (Si3N4) balls reduce weight, centrifugal force, and wear, enabling higher limiting speeds. |
| P4A | Tolerance class superior to ABEC 7 / ISO P4. | Guarantees extremely tight dimensional and running accuracy for superior system performance. |
| DGA | Sealed on both sides, pre-lubricated with grease. | Provides effective contamination exclusion and is ready for immediate use, offering long-term, maintenance-free operation. |
S7018 ACE/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and extra light preload (Class A) provide excellent resistance to deflection under complex combined loads, ensuring precise shaft positioning and system stability.
- Superior High-Speed Performance: The combination of hybrid ceramic balls (lower density than steel) and a lightweight phenolic cage significantly reduces centrifugal forces and friction, allowing the bearing to achieve its high limiting speed of 15,000 rpm with minimal heat generation.
- Extended Service Life & Reliability: The sealed design (DGA) effectively protects the precision-ground chrome steel rings and ceramic balls from contaminants. Pre-lubrication ensures optimal performance from the first rotation across a wide temperature range (-30°C to 110°C).
- Universal Matchability (SU): Supplied as a matched set of two bearings, they are manufactured to universal standards, allowing for flexible mounting arrangements (back-to-back, face-to-face, or tandem) to perfectly suit specific application requirements for preload and stiffness.
S7018 ACE/HCP4ADGA Bearing Typical Application Areas
This high-precision bearing is ideally suited for applications where extreme accuracy, high speed, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices and laboratory equipment.
- High-Frequency Motors & Spindles: PCB drilling spindles and dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
