7004 CE/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7004 CE/HCP4ADT
Basic Information
System of measurement
Metric
Weight
0.11 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
2722 lbf
Radial static load rating
1508 lbf
Limiting speed
63 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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7004 CE/HCP4ADT Bearing Product Overview & Core Advantages
The 7004 CE/HCP4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex tandem (DT) arrangement bearing set is preloaded and manufactured to a P4A tolerance class, ensuring ultra-high running accuracy and system rigidity. Its core advantages include the ability to handle high combined loads (radial and axial), superior high-speed capabilities facilitated by a phenolic cage and ceramic balls, and outstanding operational stability. This configuration is ideal for machine tool spindles and other high-precision machinery where maximum rigidity and rotational precision are critical.
7004 CE/HCP4ADT 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 high axial load capacity. |
| E | Optimized internal design for enhanced performance. |
| HC | Hybrid Ceramic: Features ceramic balls for reduced friction, higher speed, and longer service life. |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards for exceptional running accuracy. |
| DT | Duplex Tandem arrangement. Two bearings are mounted together to share the load in the same direction, significantly increasing axial load capacity and system rigidity. |
7004 CE/HCP4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem (DT) arrangement creates an extremely rigid bearing system capable of supporting high combined radial and axial loads in one direction. The 15° contact angle is specifically chosen to maximize axial load carrying capability.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a very high limiting speed of 63,000 rpm. This results in lower operating temperatures and less wear.
- Precision & Accuracy: Manufactured to a P4A tolerance class, this bearing ensures minimal runout and vibration, which is paramount for applications requiring extreme rotational precision.
- Preloaded Design: Supplied as a preloaded set, eliminating internal clearance and ensuring precise shaft positioning, immediate system response, and enhanced stiffness from startup.
7004 CE/HCP4ADT Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy joints and arm assemblies.
- High-Frequency Spindles: PCB drilling and routing machines.
- Medical Equipment: Dental handpieces and high-speed scanners.
- Aerospace Instrumentation: Gyroscopes and other precision navigation systems.
