7020 ACE/P4ADBG5GMM2
7000 Series Super Precision Angular Contact Ball Bearings
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7020 ACE/P4ADBG5GMM2 Bearing Product Overview & Core Advantages
The 7020 ACE/P4ADBG5GMM2 is a precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. This matched back-to-back arrangement (DB) provides superior stiffness and the ability to withstand combined radial and axial loads from both directions simultaneously. Manufactured to P4A tolerance class, it ensures high running accuracy and is preloaded for optimal performance in high-speed and high-precision machinery.
7020 ACE/P4ADBG5GMM2 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7020 | Standard bearing series designation (Bore: 100mm, OD: 150mm, Width: 48mm) |
| ACE | 25° contact angle design, optimized for high axial load capacity |
| P4A | High precision tolerance class (exceeds ABEC 7/ISO P4), ensuring minimal runout and vibration |
| DB | Duplex Back-to-Back mounting arrangement for high moment rigidity |
| G5 | Specific preload level for optimal stiffness and running accuracy |
| GMM2 | Grease lubrication specification and quantity for the matched set |
7020 ACE/P4ADBG5GMM2 Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) configuration creates a wide effective spread between load centers, significantly increasing moment stiffness. This enables the bearing set to handle substantial combined radial and axial loads and overturning moments. The 25° contact angle is specifically chosen to provide excellent axial load support.
Precision & High-Speed Performance: Manufactured to P4A precision class with tight dimensional tolerances on all bearing dimensions (bore, OD, width), this bearing ensures minimal runout for smooth, quiet operation. The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 20,000 rpm, making it suitable for demanding high-speed applications.
Durability & Reliability: Constructed from high-grade chrome steel for both rings and balls, the bearing offers excellent fatigue life and wear resistance. The set is supplied preloaded and pre-greased, ready for installation, which simplifies mounting and ensures consistent performance from startup.
7020 ACE/P4ADBG5GMM2 Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring extreme rigidity and running accuracy.
- Precision Gearboxes: Applications where low noise, high speed, and precise shaft positioning are critical.
- High-Frequency Motors & Spindles: Electric motor spindles and high-RPM drives.
- Industrial Pumps & Compressors: For handling significant axial and radial loads in rotary equipment.
- Robotics & Automation: Precision joints and arm linkages demanding high stiffness and repeatability.
