S7018 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S7018 ACDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
1.02 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
90 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
140 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
20
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
16672 lbf
Radial static load rating
16200 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S7018 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The S7018 ACDGA/HCP4A is a super-precision angular contact ball bearing engineered for the most demanding high-performance applications. This single bearing features a 25° contact angle and an extra light preload (Class A), making it exceptionally suited for systems requiring high rigidity, exceptional running accuracy, and superior high-speed capability. Its design is optimized to handle combined loads (radial and axial) simultaneously, providing stable and precise rotational performance in critical machinery. The use of ceramic balls and a phenolic cage further enhances its high-speed performance and durability.
S7018 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S7018 ACDGA/HCP4A provides detailed technical specifications through its suffixes:
- S70: Indicates a super-precision series angular contact ball bearing.
- 18: Specifies the bore diameter code (90 mm).
- A: Denotes a 25° contact angle.
- CD: Signifies a universally matchable (SU) bearing, allowing for precise preload control when mounted in pairs or sets.
- GA: Indicates a specific internal clearance and preload class; here, it signifies Extra Light Preload (Class A).
- /HC: Denotes the use of Hybrid Ceramic balls (Silicon Nitride).
- P4A: Specifies an ultra-high tolerance class superior to ABEC 7, ensuring extreme dimensional and running accuracy.
S7018 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The bearing's super-precision P4A tolerance and controlled preload deliver exceptional rotational accuracy and system stiffness, minimizing deflection under load.
- Superior High-Speed Performance: The combination of a lightweight phenolic resin cage and low-density ceramic balls significantly reduces centrifugal forces, enabling very high limiting speeds (up to 15,000 rpm with grease lubrication).
- Enhanced Durability and Life: Hybrid ceramic construction provides excellent wear resistance, reduced operating temperature, and extended service life compared to all-steel bearings, especially in high-speed applications.
- Universal Matching Design: The Universal Matchable (SU, CD suffix) feature allows these bearings to be mounted in pairs (back-to-back, face-to-face, or tandem) to support complex load configurations without the need for selective assembly.
- Sealed and Grease-Lubricated: The sealed design with pre-applied grease protects against contamination and provides long-term, maintenance-free operation within the specified temperature range.
S7018 ACDGA/HCP4A Bearing Typical Application Areas
The S7018 ACDGA/HCP4A is ideally suited for high-tech, high-speed machinery where precision and reliability are paramount. Key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Spindles: In PCB drilling, semiconductor manufacturing, and other precision machining equipment.
- High-Speed Motors and Drives: Used in electric vehicle powertrains, high-frequency motors, and turbochargers.
- Aerospace and Defense Systems: In gyroscopes, navigation systems, and auxiliary power units (APUs).
- Medical Equipment: For dental handpieces and high-speed centrifuges.
