7004 CD/P4ADGD
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7004 CD/P4ADGD
Basic Information
System of measurement
Metric
Weight
0.14 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
20 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
42 mm
Outside diameter tolerance
-0.004mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3150 lbf
Radial static load rating
1912 lbf
Limiting speed
121 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Heavy / Class D
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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7004 CD/P4ADGD Bearing Product Overview & Core Advantages
The 7004 CD/P4ADGD is a precision angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. Engineered to a P4A tolerance class, it offers superior running precision. Its key advantage lies in its Universal Matchable (SU) design and Heavy preload (Class D), enabling it to handle significant combined loads (radial and axial) simultaneously with high stiffness. This makes it an ideal choice for high-performance spindles and other precision machinery requiring minimal deflection under load.
7004 CD/P4ADGD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7004 | Basic bearing series and size designation (20mm bore, 42mm OD, 24mm width). |
| C | 15° contact angle, optimized for carrying high axial loads. |
| D | Heavy preload (Class D), providing maximum rigidity and rotational accuracy. |
| P4A | High precision tolerance class, exceeding ABEC 7 standards. |
| DGD | Universal Matchable (SU) designation. Two bearings are a "Universal Duplex" pair, supplied pre-ground to be mounted in either DB or DF configurations. |
7004 CD/P4ADGD Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The heavy preload and 15° contact angle work in concert to deliver exceptional stiffness, enabling the bearing to withstand substantial combined loads with minimal deformation. The Universal Matchable (SU) design ensures optimal load sharing in duplex pairs.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing guarantees smooth, quiet operation and high positional accuracy.
- High-Speed Capability: The lightweight, robust phenolic cage and optimized internal geometry contribute to a high limiting speed of 121,000 rpm, making it suitable for high-speed applications.
- Durability & Reliability: Constructed from chrome steel for both rings and balls, the bearing offers high fatigue life and wear resistance. It comes pre-lubricated for immediate operation.
7004 CD/P4ADGD Bearing Typical Application Areas
This bearing is specifically engineered for high-precision, high-rigidity applications, including:
- Machine Tool Spindles (e.g., CNC milling, grinding, and lathe spindles)
- High-Frequency Spindles
- Precision Gearboxes
- Robotic Drives and Actuators
- Medical and Dental Equipment Spindles
