S7018 ACB/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S7018 ACB/HCP4A
Basic Information
System of measurement
Metric
Weight
1.18 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
10.319 mm
Ball quantity
25
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
6075 lbf
Radial static load rating
5310 lbf
Limiting speed
13 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:
$ 1106.3
/ each
In Stock
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S7018 ACB/HCP4A Bearing Product Overview & Core Advantages
The S7018 ACB/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and reliability. This single-row bearing features a 25° contact angle and is supplied with a preload, delivering superior high rigidity and rotational accuracy. Its design is optimized to handle combined loads—significant radial loads and unidirectional axial loads—simultaneously. Manufactured to a P4 (ABEC-7) tolerance class and incorporating ceramic balls, it is an ideal solution for high-speed operation and extended service life in precision machinery.
S7018 ACB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S7018 ACB/HCP4A provides detailed technical specifications:
- S7018: Denotes the bearing series and size (90 mm bore, 140 mm OD, 24 mm width).
- ACB: Signifies Angular Contact Bearing.
- HCP4A: A composite suffix indicating:
- HC: Hybrid Ceramic construction, featuring steel rings and ceramic balls.
- P4: The tolerance class (equivalent to ABEC-7), ensuring ultra-precise dimensions and running accuracy.
- A: Indicates a 25° contact angle.
S7018 ACB/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces friction, heat generation, and wear. This construction enables higher limiting speeds, provides electrical insulation, and extends lubrication life.
- High Rigidity & Preload: The bearing is supplied with a preload, which eliminates internal clearance. This results in enhanced shaft positioning accuracy, superior stiffness, and reduced vibration and noise under load.
- High-Speed Capability: The lightweight phenolic resin cage and low-density ceramic balls reduce centrifugal forces, allowing the bearing to achieve a high limiting speed of 13,000 rpm. The pre-applied lubrication is formulated for stable performance at these elevated speeds.
- Precision Performance: Manufactured to P4 tolerance, this bearing guarantees minimal runout and consistent, high-precision rotation, which is critical for applications like machine tool spindles.
- Sealed & Lubricated for Life: The sealed design effectively excludes contaminants and retains the high-performance grease, making the bearing maintenance-free for its entire service life within the specified temperature range of -30°C to 110°C.
S7018 ACB/HCP4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for applications where speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors & Spindles: Motors for CNC machinery and PCB drilling.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
- Medical Equipment: High-speed dental handpieces and imaging scanner rotors.
