7018 ACD/HCPA9ALDT
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7018 ACD/HCPA9ALDT
Basic Information
System of measurement
Metric
Weight
2.03 kg
Tolerance class
PA9A
Seal type
Open
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
48 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
27225 lbf
Radial static load rating
32175 lbf
Limiting speed
16 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
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
In Stock
Price available upon request.
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7018 ACD/HCPA9ALDT Bearing Product Overview & Core Advantages
The 7018 ACD/HCPA9ALDT is a precision duplex tandem angular contact ball bearing designed for high-performance applications. This matched set of two bearings is engineered to handle significant combined loads—primarily thrust loads in one direction—while offering exceptional rotational accuracy and system rigidity. Its defining features include a ceramic ball construction and a PA9A tolerance class, making it an ideal solution for high-speed machinery requiring maximum precision and reliability in a compact envelope.
7018 ACD/HCPA9ALDT Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| ACD | Angular Contact, Duplex Tandem arrangement | Bearings are pre-loaded and matched in a tandem configuration to handle high unidirectional thrust loads. |
| H | Ceramic Balls | Enables higher speeds, reduced friction, and longer service life, especially in demanding conditions. |
| C | 15° Contact Angle (Standard for this series) | Optimized for high thrust capacity and high-speed operation. |
| PA9A | High-Precision Tolerance Class | Guarantees extremely tight dimensional tolerances and runout accuracy for superior system performance. |
| L | Light Preload | Eliminates internal clearance for maximum rigidity and precise shaft positioning. |
| DT | Duplex Tandem | Confirms the matched set arrangement, where two bearings are paired to share the axial load. |
7018 ACD/HCPA9ALDT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem arrangement and applied preload create an exceptionally stiff bearing system capable of withstanding high thrust loads and moderate radial loads without deflection.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage significantly lowers rotating mass, enabling stable operation up to the limiting speed of 16,000 rpm.
- Precision Engineering: Manufactured to PA9A tolerance class with extremely tight bore and outside diameter tolerances, this bearing ensures minimal runout and vibration for ultra-precise applications.
- Optimized for System Integration: Supplied as a pre-lubricated and pre-matched set, it simplifies installation and guarantees the specified performance right out of the box, reducing assembly time and potential errors.
7018 ACD/HCPA9ALDT Bearing Typical Application Areas
This bearing is specifically designed for high-demand sectors, including:
- High-Speed Machine Tool Spindles: For CNC milling, grinding, and drilling centers where precision, speed, and rigidity are paramount.
- Precision Robotics: In high-accuracy robotic arms and joints requiring minimal backlash and high positional repeatability.
- Aerospace Actuation Systems: For flight control actuators and other critical systems demanding high reliability and performance.
- Advanced Medical Equipment: In high-speed dental handpieces and surgical drill spindles.
