7018 ACD/P4AQBTB
7000 Series Super Precision Angular Contact Ball Bearings
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7018 ACD/P4AQBTB Bearing Product Overview & Core Advantages
The 7018 ACD/P4AQBTB is a high-precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and load capacity. This P4A tolerance class bearing features a Quadruplex Tandem Back-to-Back (QBT) matched arrangement, enabling it to handle significant combined loads (radial and axial) with superior stability. Its light preload (Class B) ensures precise rotational accuracy and minimal deflection, making it ideal for high-speed, high-rigidity machinery where uncompromising performance is critical.
7018 ACD/P4AQBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7018 | Basic bearing series, defining the standard dimensions (90mm bore, 140mm OD, 96mm width). |
| ACD | Angular Contact Design with a 25° contact angle, optimized for high axial load capacity. |
| P4A | Ultra-precision tolerance class exceeding ABEC 7, ensuring minimal runout and vibration for critical applications. |
| QBTB | Quadruplex Tandem Back-to-Back arrangement. Four bearings are matched and mounted in a back-to-back configuration to maximize system rigidity and moment load capacity. |
7018 ACD/P4AQBTB Bearing Structural Features & Performance Benefits
Optimized Rigidity & Load Distribution: The QBTB matched set creates an exceptionally stiff bearing system, effectively resisting complex combined loads and moment loads. This configuration significantly enhances the operational stability of the entire spindle or shaft assembly.
High-Speed Capability: The phenolic resin cage is lightweight and possesses excellent sliding properties, contributing to lower friction and enabling high limiting speeds of up to 15,000 rpm. The 25° contact angle provides an optimal balance between radial and axial load capacity for high-speed operation.
Precision & Reliability: Manufactured to P4A precision tolerances with a light preload, this bearing guarantees minimal running noise, reduced heat generation, and extended service life. The open seal type allows for customized lubrication schemes to match specific operational requirements.
Superior Load Ratings: With a dynamic load rating of 44,775 lbf and a static load rating of 65,250 lbf, this bearing set is engineered for heavy-duty performance and long-term durability under demanding conditions.
7018 ACD/P4AQBTB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring ultimate precision and rigidity.
- Precision Gearboxes: Applications demanding high torque capacity and minimal shaft deflection.
- Industrial Pumps & Compressors: For handling significant axial and radial forces in high-performance fluid handling systems.
- High-Frequency Spindles: PCB drilling, precision engraving, and other applications where high RPM and accuracy are paramount.
