7018 ACE/HCPA9ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7018 ACE/HCPA9ADGA
Basic Information
System of measurement
Metric
Weight
2.22 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
11.112 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
12442 lbf
Radial static load rating
13500 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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7018 ACE/HCPA9ADGA Bearing Product Overview & Core Advantages
The 7018 ACE/HCPA9ADGA is a high-precision angular contact ball bearing engineered for demanding applications. Its core advantage lies in its ability to handle combined loads (radial and axial) simultaneously with exceptional accuracy and stability. Featuring a universal matchable (SU) design, two bearings can be paired in a back-to-back or face-to-face arrangement to optimize stiffness and moment load capacity. Manufactured to a PA9A tolerance class with a 25° contact angle and an extra light preload (Class A), this bearing is ideal for high-speed, high-rigidity systems requiring superior rotational precision and reliability.
7018 ACE/HCPA9ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 7018 ACE/HCPA9ADGA is decoded as follows:
- 7018: Basic series designation, indicating a metric angular contact ball bearing with a 90mm bore, 140mm OD, and 48mm width.
- A: Denotes a 25° contact angle.
- CE: Indicates the use of ceramic (hybrid) balls.
- /HCPA9A: Specifies the tolerance class (PA9A) and preload (Class A - Extra Light).
- DGA: Signifies the bearing is universal matchable (SU) and supplied as part of a pre-defined set of two bearings.
7018 ACE/HCPA9ADGA Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The combination of chrome steel rings and ceramic balls significantly reduces friction and heat generation, enabling higher limiting speeds (15,000 rpm) and extended service life. Ceramic balls are also non-conductive and highly resistant to corrosion.
- High Rigidity & Load Capacity: The angular contact design and universal matching capability allow for configurations that provide high system rigidity and excellent capacity for combined radial and axial loads (Dynamic: 12,442 lbf, Static: 13,500 lbf).
- Precision & Stability: Manufactured to PA9A tolerance class with a phenolic cage, this bearing ensures smooth, quiet operation and minimal rotational runout, which is critical for high-precision applications.
- Optimized for High-Speed: The phenolic cage is lightweight and robust, contributing to the high limiting speed and stable performance under rapid acceleration and deceleration.
7018 ACE/HCPA9ADGA Bearing Typical Application Areas
This precision bearing is ideally suited for:
- Machine Tool Spindles
- High-Speed CNC Machining Centers
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Advanced Robotics and Automation Systems
