7024 ACDGB/PA9A
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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7024 ACDGB/PA9A Bearing Product Overview & Core Advantages
The 7024 ACDGB/PA9A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior running accuracy. Positioned as a universal matchable bearing (SU designation), it is designed to be mounted in sets (typically 3 bearings) to form a rigid, preloaded system. Its key characteristics include a 25° contact angle for optimal handling of combined radial and axial loads, a light preload (Class B) for minimal deflection, and adherence to the stringent PA9A tolerance class, making it ideal for high-speed, high-rigidity spindles and precision machinery.
7024 ACDGB/PA9A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7024 | Standard bearing size designation (120mm bore, 180mm OD, 28mm width) | Defines the core bearing dimensions. |
| AC | Angular Contact design | Optimized for combined loads. |
| DGB | Universal Matchable bearing (SU), supplied in a set for a specific preload (Light / Class B) | Ensures bearings are precision-matched for immediate installation without adjustment, providing consistent high rigidity. |
| PA9A | High-Precision Tolerance Class | Denotes extremely tight dimensional and running accuracy tolerances, crucial for high-speed and low-vibration operation. |
7024 ACDGB/PA9A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The single-row angular contact design, combined with the universal matching (SU) and light preload, creates a system with exceptional stiffness and minimal axial/radial play. This is critical for applications requiring high positional accuracy.
Superior Load Capacity: With a 25° contact angle, this bearing efficiently supports significant combined radial and axial loads simultaneously. The dynamic load rating of 24,975 lbf and static load rating of 26,100 lbf confirm its robust performance.
Optimized High-Speed Performance: The phenolic cage is lightweight and possesses excellent sliding properties, contributing to lower friction and higher limiting speeds (up to 10,000 rpm). The open design and factory-applied lubrication facilitate efficient heat dissipation.
Precision Materials: Constructed from chrome steel for both rings and balls, the bearing ensures high durability, wear resistance, and long service life under demanding operating conditions.
7024 ACDGB/PA9A Bearing Typical Application Areas
The 7024 ACDGB/PA9A is ideally suited for high-performance machinery where precision and speed are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines, precision grinding equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM applications.
- Robotics: High-accuracy rotary joints and arm assemblies.
