7024 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Ball & Washer Dimensions
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7024 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 7024 CDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. As a single bearing in a universally matchable (SU) set, it is engineered to accommodate combined loads, primarily handling high radial loads and axial loads in one direction. Its defining features include a P4A tolerance class for superior running accuracy, a ceramic ball and phenolic cage construction for high-speed capability, and an extra light preload (Class A) for optimal rigidity and minimal rotational friction. This configuration makes it ideal for high-speed spindles and other precision machinery where high rigidity and operational reliability are paramount.
7024 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7024 | Standard bore diameter (120 mm), outside diameter (180 mm), and width (28 mm) dimensions. | Defines the core bearing dimensions. |
| CDGA | 15° contact angle, extra light preload (Class A), and universal matchable (SU) designation. | Specifies the contact angle, preload class, and matching arrangement for optimal performance in a paired set. |
| HCP4A | Hybrid Ceramic with Phenolic cage and P4A tolerance class. | Indicates the use of ceramic balls and a phenolic cage for high-speed operation, combined with a very high precision tolerance class. |
7024 CDGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The use of ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and provides electrical insulation, enabling higher limiting speeds (16,000 rpm) and extended service life compared to all-steel designs.
Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability and low friction at high speeds, contributing to smooth operation and reduced vibration.
High-Precision P4A Tolerance: Manufactured to P4A tolerance class with tight dimensional and running accuracy tolerances (bore and OD tolerance: -0.004mm to 0), ensuring minimal runout and superior performance in precision applications.
Optimized Load Capacity: The 15° contact angle and robust design provide a high radial dynamic load rating of 25,650 lbf and a radial static load rating of 27,450 lbf, making it capable of handling significant combined loads.
Universal Matchability (SU): Designed as a universally matchable bearing, two identical bearings can be paired in a duplex set (back-to-back or face-to-face) without selective matching, simplifying installation and achieving pre-defined preload and stiffness.
7024 CDGA/HCP4A Bearing Typical Application Areas
The 7024 CDGA/HCP4A is ideally suited for high-performance machinery requiring high speed, high rigidity, and extreme precision. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling spindles and precision grinding spindles.
- High-Frequency Motors: Spindles for routers and other high-RPM electric motors.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical rotating assemblies.
