S7004 ACE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7004 ACE/HCP4A
Basic Information
System of measurement
Metric
Weight
0.059 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
20 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
42 mm
Outside diameter tolerance
-0.006mm 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° to 110 °C
Radial dynamic load rating
1609 lbf
Radial static load rating
731 lbf
Limiting speed
58 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
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
Price:
$ 119.09
/ each
In Stock
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S7004 ACE/HCP4A Bearing Product Overview & Core Advantages
The S7004 ACE/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As a single-row bearing with a 25° contact angle and ceramic balls, it excels in handling combined loads, particularly high axial loads in one direction. Its P4 (ABEC-7) tolerance class and preload availability ensure superior running accuracy and minimal vibration, making it ideal for high-speed and high-reliability scenarios where performance is critical.
S7004 ACE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| S7004 | Standard designation for a 20mm bore, 42mm OD, 12mm width angular contact ball bearing. |
| ACE | Indicates a 25° contact angle and specific internal design optimized for high-speed operation. |
| HC | Signifies the use of Hybrid Ceramic balls (ceramic balls with steel rings), reducing friction and heat generation. |
| P4A | Denotes the P4 (ABEC-7) tolerance class, ensuring extremely tight dimensional and running accuracy. |
S7004 ACE/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of a phenolic resin cage, hybrid ceramic balls, and a 25° contact angle enables a high limiting speed of 58,000 rpm. The lightweight cage and lower density ceramic balls minimize centrifugal forces, critical for ultra-high-speed applications.
- Superior Rigidity and Load Capacity: The 25° contact angle provides excellent resistance to axial loads while maintaining good radial load capacity. The availability of preload further increases system stiffness, reducing deflection under load for enhanced machining or positioning accuracy.
- Reduced Friction and Heat: Ceramic balls are harder, smoother, and lighter than steel, leading to significantly lower friction, reduced operating temperatures, and extended bearing service life, especially at high speeds.
- Sealed and Lubricated for Longevity: As a sealed bearing that comes pre-lubricated, it is protected from contamination and is ready for immediate installation, offering a maintenance-free solution within its specified temperature range of -30°C to 110°C.
S7004 ACE/HCP4A Bearing Typical Application Areas
This bearing is engineered for high-performance machinery where speed, precision, and reliability are paramount. Key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and drilling spindles requiring P4-level precision and rigidity.
- Precision Robotics: In robot arm joints and CNC rotary tables demanding high positional accuracy and rapid movement.
- High-Frequency Spindles: Used in PCB drilling, dental handpieces, and other applications pushing the limits of rotational speed.
- Aerospace & Defense Systems: In gyroscopes, navigation systems, and other critical components where failure is not an option.
