7020 ACD/P4AQBCB
7000 Series Super Precision Angular Contact Ball 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
7020 ACD/P4AQBCB Bearing Product Overview & Core Advantages
The 7020 ACD/P4AQBCB is a precision quadruplex matched set of angular contact ball bearings designed for the most demanding applications. This P4A tolerance class set is pre-configured in a Back-to-Back (QBC) arrangement, delivering exceptional system rigidity and stability. Its core advantage lies in its ability to handle significant combined loads—high radial loads and thrust loads in both directions—simultaneously. The light preload (Class B) ensures precise rotational accuracy and minimal run-out, making it ideal for high-speed, high-precision spindles where maximum performance and reliability are critical.
7020 ACD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7020 | Basic bearing series and size designation. | Defines the core dimensions: 100mm bore, 150mm OD. |
| ACD | Angular Contact, 25° Contact Angle. | Optimized for high axial load capacity and high-speed operation. |
| P4A | High Precision Tolerance Class. | Exceeds ABEC-7 standards, ensuring ultra-low noise, vibration, and run-out for superior performance. |
| QBC | Quadruplex Back-to-Back matched set. | Four bearings are selectively matched and pre-loaded as a unit to provide maximum moment stiffness and thermal stability. |
7020 ACD/P4AQBCB Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The quadruplex back-to-back configuration creates an exceptionally stiff bearing system, capable of resisting complex combined loads and substantial overturning moments. This is critical for maintaining precision under heavy cutting forces or dynamic loads.
High-Speed Capability: The phenolic resin cage is lightweight and robust, offering excellent performance at high rotational speeds with minimal centrifugal force and friction. The 25° contact angle provides an optimal balance between radial and axial load capacity for high-speed applications.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width. This guarantees precise shaft and housing fits, contributing to the overall accuracy and longevity of the machine tool spindle.
Premium Material & Lubrication: Constructed from high-grade chrome steel for both rings and balls, ensuring high durability and fatigue life. The bearings are pre-lubricated for immediate operation within a wide temperature range of -30°C to 110°C.
7020 ACD/P4AQBCB Bearing Typical Application Areas
The 7020 ACD/P4AQBCB is engineered for high-performance machinery requiring ultimate precision and stiffness. Its primary applications include:
- Machine Tool Spindles: High-speed CNC milling, grinding, and turning centers.
- Precision Spindles: For PCB drilling, high-frequency motorized spindles, and other precision machining equipment.
- High-Rigidity Rotary Tables: Indexing and rotary tables in machining and inspection systems.
- Advanced Robotics: High-precision joints and actuators requiring minimal deflection.
