S7024 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7024 CDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
1.78 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
120 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
180 mm
Outside diameter tolerance
-0.004mm to 0
Width
28 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
19.05 mm
Ball quantity
22
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
25650 lbf
Radial static load rating
27450 lbf
Limiting speed
10 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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S7024 CDGA/HCP4A Bearing Product Overview & Core Advantages
The S7024 CDGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional speed and rigidity. This single bearing features a 15° contact angle and is manufactured to P4A super-precision tolerance, ensuring minimal runout and superior rotational accuracy. Its core advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high stability. The use of ceramic balls and a phenolic cage significantly contributes to its high-speed capability, low friction, and extended service life, making it ideal for ultra-precise, high-reliability spindle systems.
S7024 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| S7024 | Basic bearing designation, indicating a 120mm bore, 180mm OD, 28mm width angular contact bearing. |
| C | 15° nominal contact angle. |
| DG | Universal Matchable (SU) bearing. Two bearings can be mounted in a universal arrangement (face-to-face or back-to-back). |
| A | Extra light preload class. |
| HC | Hybrid Ceramic: The rolling elements are ceramic balls. |
| P4A | Super-precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
S7024 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls reduces centrifugal forces, lowers operating temperature, and allows for higher limiting speeds. Ceramic's non-conductive properties also mitigate electrical arcing damage.
- High-Speed Phenolic Cage: The lightweight and robust phenolic resin cage ensures excellent dimensional stability and guidance at very high rotational speeds, contributing to the bearing's smooth operation and high limiting speed of 10,000 rpm.
- Super-Precision P4A Tolerance: Manufactured to the tightest dimensional and running accuracy standards, this ensures minimal vibration and precise shaft positioning, which is critical for high-precision machining and metrology.
- Optimized Grease Lubrication: Pre-lubricated with high-performance grease suitable for the specified temperature range (-30°C to 110°C), providing long-term, maintenance-free operation in sealed applications.
- Universal Matchability (SU): The DG suffix indicates that these bearings are universal matchable, allowing for simplified mounting in preload-adjusted pairs (typically in sets of 4) to achieve optimal system stiffness and running accuracy.
S7024 CDGA/HCP4A Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed CNC milling, grinding, and turning centers.
- Precision Spindles: PCB drilling spindles, high-frequency motor spindles.
- Aerospace & Defense: Gyroscopes, navigation systems, and auxiliary power units (APUs).
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
