7018 ACD/HCP4ATBTC
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7018 ACD/HCP4ATBTC Bearing Product Overview & Core Advantages
The 7018 ACD/HCP4ATBTC is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This triplex back-to-back matched set configuration delivers superior stiffness and load distribution, making it ideal for applications subjected to combined radial and axial loads. Manufactured to P4A tolerance class and featuring a 25° contact angle, this bearing set ensures high running accuracy and reliable performance in high-speed, high-rigidity environments.
7018 ACD/HCP4ATBTC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7018 | Standard Bearing Series & Size | Defines the basic dimensions: 90mm bore, 140mm OD, 72mm width |
| ACD | Angular Contact Design | Optimized for combined loads with 25° contact angle |
| HCP4A | High Precision (P4A) Tolerance Class | Ensures extremely tight dimensional and running accuracy |
| TBT | Triplex Back-to-Back Arrangement | Three bearings matched for maximum rigidity and moment load capacity |
| C | Moderate Preload Class | Provides optimal stiffness while maintaining thermal stability |
7018 ACD/HCP4ATBTC Bearing Structural Features & Performance Benefits
Enhanced Rigidity & Load Capacity: The triplex back-to-back configuration creates an exceptionally rigid bearing system capable of handling heavy combined radial and axial loads, as well as significant moment loads. With a radial dynamic load rating of 36,675 lbf and static load rating of 48,600 lbf, this bearing set delivers reliable performance under demanding conditions.
High-Speed Performance: The combination of ceramic balls and phenolic cage enables superior high-speed operation, with a limiting speed of 16,000 rpm. The reduced weight and excellent thermal properties of these materials contribute to lower centrifugal forces and stable operation at elevated speeds.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore and OD tolerance: -0.004mm to 0), this bearing set ensures minimal runout and vibration for applications requiring high positional accuracy.
Material Excellence: Chrome steel rings provide durability and wear resistance, while ceramic balls offer reduced weight, higher stiffness, and improved corrosion resistance compared to steel balls.
7018 ACD/HCP4ATBTC Bearing Typical Application Areas
This high-precision triplex bearing set is specifically designed for applications requiring exceptional rigidity, accuracy, and speed capabilities:
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Rotary Tables - Indexing and positioning systems
- High-Speed Machining Centers - Aerospace and automotive manufacturing equipment
- Robotic Arm Joints - Precision automation and robotics
- Medical Equipment - CT scanners and high-speed medical imaging devices
- Aerospace Systems - Gyroscopes and navigation equipment
