S71918 ACE/HCP4ATT
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S71918 ACE/HCP4ATT Bearing Product Overview & Core Advantages
The S71918 ACE/HCP4ATT is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and speed performance. This matched set bearing features a Triplex Tandem (3-DT) arrangement, enabling it to handle significant combined loads—both radial and axial—simultaneously. Manufactured to a P4A tolerance class with a 25° contact angle, it delivers superior running accuracy and positional stability. The use of ceramic balls and a phenolic cage contributes to reduced friction, lower operating temperatures, and higher limiting speeds, making it an ideal solution for high-performance spindle systems.
S71918 ACE/HCP4ATT Bearing Model Code Explained, Specifications & Naming Convention
| S71918 | Basic bearing series designation for high-precision angular contact bearings |
| ACE | Specific internal design and contact angle (25°) configuration |
| HC | Hybrid Ceramic construction with steel rings and ceramic balls |
| P4A | Ultra-precision tolerance class exceeding ABEC 7/ISO P4 standards |
| ATT | Triplex Tandem arrangement of three matched bearings |
S71918 ACE/HCP4ATT Bearing Structural Features & Performance Benefits
Enhanced Rigidity & Load Capacity: The Triplex Tandem arrangement provides exceptional system stiffness, enabling precise positioning under heavy combined loads. With a radial dynamic load rating of 14,040 lbf and static load rating of 15,300 lbf, this bearing set offers reliable performance in demanding applications.
Superior High-Speed Performance: The combination of ceramic balls and phenolic resin cage reduces centrifugal forces and maintains dimensional stability at high speeds, achieving a limiting speed of 15,000 rpm. The optimized internal geometry minimizes heat generation during high-speed operation.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore diameter tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for applications requiring exceptional accuracy.
Pre-lubricated & Sealed Design: Factory-filled with high-performance grease and featuring integral seals, this bearing offers maintenance-free operation within a temperature range of -30°C to 110°C.
S71918 ACE/HCP4ATT Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision milling applications
- Precision Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Semiconductor Manufacturing: Wafer handling robots, precision positioning stages, and inspection equipment
- High-Speed Automation: Robotics, pick-and-place systems, and precision assembly machinery
