7018 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7018 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
1.01 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
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
16 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:
$ 921.82
/ each
In Stock
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7018 ACD/HCP4A Bearing Product Overview & Core Advantages
The 7018 ACD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single-row bearing is distinguished by its 25° contact angle and is supplied with a P4 (ABEC-7) tolerance class, ensuring ultra-precise rotational accuracy. Its core advantages include the ability to accommodate high combined loads (radial and axial), superior high-speed capability facilitated by a phenolic cage and ceramic balls, and a preloaded design for enhanced system rigidity and reduced noise and vibration in operation.
7018 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7018 | Standard bearing series number, defining the basic dimensions: 90mm bore, 140mm OD, 24mm width. |
| ACD | Signifies a 25° contact angle and a specific internal design optimized for high stiffness and speed. |
| HCP4A | Indicates a P4 (ABEC-7) tolerance class and that the bearing is supplied with a preload for immediate high-rigidity performance. |
7018 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Preload: The bearing is supplied with a preload, which eliminates internal clearance. This significantly increases system stiffness, improves rotational accuracy, and dampens vibration, making it ideal for precision applications.
- Superior High-Speed Performance: The combination of a lightweight phenolic resin cage and low-density ceramic balls reduces centrifugal forces, allowing for a very high limiting speed of 16,000 rpm. This also reduces operating temperature and wear.
- High Load Capacity: The 25° contact angle is optimized to handle significant combined radial and axial loads simultaneously, providing robust performance in demanding conditions.
- Extended Service Life & Reliability: Ceramic balls offer superior wear resistance, lower thermal expansion, and electrical insulation properties compared to steel, contributing to longer bearing life and reliability in challenging environments.
7018 ACD/HCP4A Bearing Typical Application Areas
This precision angular contact ball bearing is designed for high-performance machinery where speed, accuracy, and rigidity are critical. Key applications include:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Grinding Spindles
- High-Frequency Motors
- Robotic Arm Drives
- Aerospace & Defense Instrumentation
