7020 ACE/P4AQBCA
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7020 ACE/P4AQBCA Bearing Product Overview & Core Advantages
The 7020 ACE/P4AQBCA is a precision quadruplex angular contact ball bearing designed for applications requiring exceptional rigidity and accuracy. This P4A tolerance class bearing features a back-to-back quadruplex arrangement (QBC) that provides superior stability when handling combined radial and axial loads. With its extra light preload (Class A) and optimized 25° contact angle, it delivers high running accuracy and minimal deflection under operational stresses, making it ideal for high-precision machinery and equipment.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7020 | Standard bore diameter 100 mm, outside diameter 150 mm |
| ACE | Angular Contact, 25° contact angle, Extra light preload |
| P4A | High precision tolerance class with restricted width tolerance |
| QBC | Quadruplex Back-to-Back matched arrangement |
7020 ACE/P4AQBCA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The quadruplex back-to-back configuration creates an exceptionally rigid bearing system capable of withstanding heavy combined loads from multiple directions. This arrangement effectively counteracts moment loads and provides stable rotational characteristics.
Precision Performance: Manufactured to P4A tolerance class standards with tight dimensional controls (bore: -0.004mm to 0, width: -0.2mm to 0), this bearing ensures minimal runout and vibration. The extra light preload eliminates internal clearance while maintaining smooth operation.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio, reducing centrifugal forces and enabling stable operation at limiting speeds up to 20,000 rpm. The optimized ball quantity (27) and 12.7 mm ball diameter contribute to balanced load distribution.
Material Excellence: Constructed from chrome steel for both rings and balls, providing superior hardness, wear resistance, and dimensional stability across the operating temperature range of -30°C to 110°C.
7020 ACE/P4AQBCA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers requiring extreme accuracy and rigidity
- Precision Gearboxes: Industrial transmission systems demanding high load capacity and minimal deflection
- Robotic Systems: Articulated arms and precision positioning mechanisms
- Aerospace Components: Flight control systems and auxiliary power units
- Medical Equipment: High-speed dental handpieces and surgical tools
- Test & Measurement Instruments: Coordinate measuring machines and optical alignment systems
