S7004 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7004 ACDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.06 kg
Tolerance class
P4A
Seal type
Sealed
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
12 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1872 lbf
Radial static load rating
934 lbf
Limiting speed
100.5 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
3
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
In Stock
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S7004 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The S7004 ACDGA/HCP4A is a high-precision, double row angular contact ball bearing engineered for applications demanding exceptional accuracy and rigidity. Its design enables it to simultaneously support substantial combined loads (radial and bidirectional axial loads), making it an ideal solution for compact, high-performance systems. Featuring a P4A tolerance class, ceramic balls, and a phenolic cage, this bearing is optimized for high-speed operation and superior running accuracy, ensuring reliability in the most demanding precision environments.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S7004 | Basic bearing designation, indicating a metric series double row angular contact ball bearing with a 20mm bore. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Double row design for high rigidity and load capacity. |
| GA | Indicates a preload level of Extra Light (Class A). |
| HCP4A | High-Precision suffix. HC denotes a hybrid ceramic ball construction. P4A specifies an ultra-precision tolerance class superior to ABEC 7. |
S7004 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact configuration provides a rigid support system, capable of handling significant combined radial and axial loads from both directions without the need for complex bearing arrangements.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and ceramic (hybrid) balls reduces centrifugal forces and friction, enabling a high limiting speed of 100,500 rpm. This makes it an excellent high-speed bearing.
- Enhanced Precision and Longevity: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration. The ceramic balls are electrically insulating, less prone to wear, and perform well across a wide temperature range.
- Universal Matching & Preload: Designated as Universal Matchable (SU), these bearings can be universally paired in any combination to form a preloaded set, simplifying installation and ensuring consistent, precise performance.
S7004 ACDGA/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles for high-speed milling and grinding
- Precision Robotics and automation arms
- High-frequency Spindles in PCB drilling and routing
- Medical and Dental Equipment handpieces
- Aerospace instrumentation and control systems
