S7004 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7004 CD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.06 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
15 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
12
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1960 lbf
Radial static load rating
968 lbf
Limiting speed
50 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:
$ 119.4
/ each
In Stock
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S7004 CD/HCP4A Bearing Product Overview & Core Advantages
The S7004 CD/HCP4A is a high-precision, single-row angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and rigidity. Manufactured to P4 (ABEC-7) tolerance class, it is designed to handle combined loads, accommodating significant axial loads in one direction alongside radial loads. Its compact design, featuring a ceramic ball and phenolic cage, makes it an ideal solution for high-speed and high-reliability scenarios where minimal vibration and long service life are critical.
S7004 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7004 | Basic bearing series and size designation (20mm bore, 42mm OD, 12mm width). |
| C | Specifies a 15° contact angle, optimized for high-speed performance and axial load capacity. |
| D | Indicates a high preload for maximum rigidity and precise rotational accuracy. |
| HC | Refers to the Hybrid Ceramic construction, utilizing ceramic balls for reduced weight, lower friction, and higher speed capability. |
| P4A | Denotes the ABEC-7 / P4 precision tolerance class, ensuring extremely tight dimensional and running accuracy. |
S7004 CD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The combination of a 15° contact angle and a high preload (D) provides exceptional system stiffness, minimizing deflection under load for superior positional accuracy.
- Enhanced Speed and Performance: The hybrid ceramic design (HC) with silicon nitride balls and a lightweight phenolic cage significantly reduces centrifugal forces, enabling a high limiting speed of 50,000 rpm and lower operating temperatures.
- Superior Load Capacity: Engineered to support combined loads, with a dynamic load rating of 1960 lbf, making it robust for demanding applications.
- Sealed and Lubricated for Long Life: As a sealed and pre-lubricated unit, it is protected from contamination and is ready for immediate installation, offering a maintenance-free operational lifespan within its specified temperature range.
S7004 CD/HCP4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery requiring precision and speed, including:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Motors and Drives
- Aerospace Actuators and Instrumentation
- Semiconductor Manufacturing Equipment
