7018 ACD/HCP4ALDT
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7018 ACD/HCP4ALDT Bearing Product Overview & Core Advantages
The 7018 ACD/HCP4ALDT is a precision duplex tandem angular contact ball bearing designed for the most demanding high-performance applications. Engineered to simultaneously handle combined radial and axial loads in a single direction, this bearing is characterized by its exceptional rigidity and high-speed capabilities. The combination of a phenolic cage, ceramic balls, and a P4A super-precision tolerance class ensures superior running accuracy, low heat generation, and extended service life, making it ideal for high-reliability machinery.
7018 ACD/HCP4ALDT Bearing Model Code Explained, Specifications & Naming Convention
- 7018: Basic series number, indicating a 90mm bore and 140mm outside diameter.
- ACD: Angular Contact, 25° contact angle design.
- HC: Hybrid Ceramic, signifying the use of ceramic balls.
- P4A: Tolerance Class stricter than ABEC 7/ISO P4, ensuring ultra-high precision.
- L: Light Preload applied to the bearing set.
- DT: Duplex Tandem arrangement, where two bearings are mounted to increase axial load capacity in one direction.
7018 ACD/HCP4ALDT Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex tandem (DT) arrangement stacks two bearings to provide maximum stiffness and significantly increased axial load capacity in one direction, which is critical for applications like machine tool spindles.
Superior High-Speed Performance: The phenolic resin cage offers excellent strength-to-weight ratio and operates smoothly at high speeds. Combined with ceramic (silicon nitride) balls that are lighter and harder than steel, the bearing achieves a lower centrifugal force, reduced friction, and a higher limiting speed of 16,000 rpm.
Precision & Longevity: The P4A tolerance class guarantees minimal runout and vibration. The open seal type allows for optimal lubrication flow, while the standard lubricant is suitable for a wide operating temperature range from -30°C to 110°C.
7018 ACD/HCP4ALDT Bearing Typical Application Areas
This high-precision, high-speed bearing is typically specified for:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Spindles in PCB drilling and routing machines
- High-Frequency Motors
- Aerospace & Defense Systems
- Medical Equipment (High-speed dental handpieces)
