S7018 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7018 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
1.02 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
90 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.009mm 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° to 110 °C
Radial dynamic load rating
16672 lbf
Radial static load rating
16200 lbf
Limiting speed
10 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1106.38
/ each
In Stock
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S7018 ACD/HCP4A Bearing Product Overview & Core Advantages
The S7018 ACD/HCP4A is a precision angular contact ball bearing engineered for applications demanding exceptional accuracy and reliability. Its design enables it to simultaneously support combined loads—significant radial loads and thrust loads in both directions. Featuring a P4 (ABEC-7) tolerance class, a ceramic ball material, and a phenolic cage, it is optimized for high-speed operation and offers superior rigidity and a long service life in a compact, single-row design.
Model Code In-Depth Analysis
| Model Segment | Technical Meaning |
|---|---|
| S7018 | Denotes the basic bearing series and size (90mm bore, 140mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates the bearing is supplied with a preload for enhanced rigidity. |
| HC | Refers to the Hybrid Ceramic construction (steel rings with ceramic balls). |
| P4A | Specifies the P4 (ABEC-7) tolerance class for ultra-precision operation. |
S7018 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The 25° contact angle and applied preload provide exceptional system stiffness, minimizing deflection under load and ensuring precise rotational accuracy, which is critical for precision machinery.
- Superior High-Speed Performance: The combination of lightweight phenolic resin cage and low-density ceramic balls reduces centrifugal forces, allowing for a very high limiting speed of 10,000 rpm. This makes it an ideal high-speed bearing.
- Enhanced Durability and Life: Hybrid ceramic construction offers superior resistance to wear and provides electrical insulation. The sealed design retains lubrication and protects against contamination, contributing to a long, maintenance-free service life.
- High Load Capacity: With a dynamic load rating of 16,672 lbf and a static load rating of 16,200 lbf, this bearing is capable of handling significant combined loads.
S7018 ACD/HCP4A Bearing Typical Application Areas
The S7018 ACD/HCP4A is ideally suited for high-performance applications across various industries, including:
- Machine Tool Spindles
- High-Frequency Motors and Spindles
- Precision Robotics
- Aerospace Actuation Systems
- Medical and Dental Equipment
