S7018 ACE/P4ADBA
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S7018 ACE/P4ADBA Bearing Product Overview & Core Advantages
The S7018 ACE/P4ADBA is a super-precision duplex back-to-back angular contact ball bearing designed for the most demanding applications. This metric system bearing is characterized by its P4A tolerance class and extra light preload (Class A), ensuring exceptional running accuracy and minimal heat generation. Its core advantage lies in its ability to handle combined radial and axial loads simultaneously with high rigidity and stability, making it an ideal choice for high-speed spindles and other precision machinery requiring supreme rotational accuracy.
S7018 ACE/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
- S7018: Basic model number denoting a 90mm bore, 140mm OD, 48mm width angular contact ball bearing.
- ACE: Internal design code specific to the manufacturer, indicating optimized internal geometry for performance.
- P4A: Tolerance class exceeding ABEC 7/ISO P4, specifying extremely tight dimensional and running accuracy tolerances.
- DB: Duplex Back-to-Back arrangement. This pre-matched set of two bearings provides high rigidity and can accommodate axial loads in both directions.
- A: Denotes Extra Light Preload (Class A), which minimizes friction and heat build-up, ideal for very high-speed operation.
S7018 ACE/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a rigid bearing system that effectively resists moment loads. This configuration, combined with a 25° contact angle, provides excellent capacity for combined loads.
Super-Precision Performance: Manufactured to a P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for achieving high surface finishes and positioning accuracy in machine tools.
Optimized for High Speeds: The phenolic resin cage is lightweight and exhibits excellent performance at high rotational speeds, contributing to the bearing's limiting speed of 15,000 rpm. The Class A preload further enhances high-speed capability by controlling deflection without excessive friction.
Sealed & Pre-Lubricated: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is ready for immediate installation, offering long-term, maintenance-free operation within its specified temperature range.
S7018 ACE/P4ADBA Bearing Typical Application Areas
The S7018 ACE/P4ADBA is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for electric motors requiring ultra-precise rotation.
- Robotics: High-accuracy joints and rotary axes.
