7001 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7001 CDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.018 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
12 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
28 mm
Outside diameter tolerance
-0.004mm to 0
Width
8 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
10
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1010 lbf
Radial static load rating
428 lbf
Limiting speed
100 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 64.2
/ each
In Stock
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7001 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 7001 CDGA/HCP4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. Engineered with a 15° contact angle and an Extra Light (A) preload, this bearing is optimized to handle combined radial and axial loads simultaneously. Its construction features a phenolic resin cage and ceramic balls, contributing to lower friction, reduced weight, and superior performance at high rotational speeds. As a P4A tolerance class bearing, it guarantees extremely tight dimensional and running accuracy, making it ideal for high-reliability, precision machinery.
7001 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit / Implication |
|---|---|---|
| 7001 | Basic bearing series designation, indicating a metric, light series bearing with a 12mm bore. | Defines the core bearing dimensions. |
| C | 15° nominal contact angle. | Optimized for high-speed operation and good axial load capacity. |
| DG | Universal Matchable bearing designation. | Can be mounted in tandem, back-to-back, or face-to-face arrangements with another identical bearing to adjust stiffness and load capacity. |
| A | Extra Light preload. | Minimizes friction and heat generation, ideal for achieving very high limiting speeds. |
| HC | Hybrid Ceramic construction (Ceramic balls with steel rings). | Provides higher speed capability, longer service life, and reduced electrical arcing risk. |
| P4A | High-Precision Tolerance Class (superior to ABEC 7). | Ensures extremely low runout and vibration for superior rotational accuracy. |
7001 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The use of silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces and friction, enabling a higher limiting speed of 100,000 rpm. This construction also offers superior resistance to wear and a longer operational lifespan compared to all-steel bearings.
- Phenolic Resin Cage: The lightweight and robust phenolic cage (often designated as "TV" or similar) contributes to smooth operation at high speeds, excellent dimensional stability, and provides good sliding properties.
- Precision & Rigidity: Manufactured to P4A tolerance class with a 15° contact angle, this bearing provides high running accuracy and system rigidity, effectively managing combined loads.
- Universal Matching (SU): The "DG" suffix indicates that this is a universal matchable bearing. Two such bearings can be paired in a set to create a pre-loaded duplex arrangement, dramatically increasing axial and radial stiffness for the most demanding applications.
7001 CDGA/HCP4A Bearing Typical Application Areas
The 7001 CDGA/HCP4A is engineered for high-performance applications where speed, precision, and reliability are critical. Key industries and equipment include:
- High-Speed Machine Tool Spindles: For CNC milling, grinding, and drilling machines requiring extreme rotational accuracy.
- Precision Instrumentation: Used in high-speed scanners, measuring devices, and optical systems.
- Aerospace & Defense Systems: Applications in gyroscopes, navigation systems, and auxiliary power units (APUs).
- High-Frequency Electric Motors & Spindles: Ideal for motors in robotics, PCB drilling, and dental handpieces.
