S7203 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7203 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.056 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
17 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
40 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
7.144 mm
Ball quantity
10
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1989 lbf
Radial static load rating
900 lbf
Limiting speed
45 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:
$ 106.35
/ each
In Stock
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S7203 ACD/HCP4A Bearing Product Overview & Core Advantages
The S7203 ACD/HCP4A is a high-precision, single-row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and speed. Its primary advantage lies in its ability to accommodate combined loads—simultaneously handling significant radial loads and thrust loads in one direction—thanks to its defined 25° contact angle. This bearing is distinguished by its use of ceramic balls and a phenolic cage, which contribute to lower friction, higher limiting speeds, and reduced weight. Pre-loaded and pre-lubricated from the factory, it offers high rigidity and is ready for immediate installation in high-performance systems.
S7203 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7203 ACD/HCP4A | The complete bearing designation. |
| S | Indicates a bearing with a super-precision tolerance class. |
| 7203 | The standard size designation for a metric angular contact bearing with a 17mm bore, 40mm OD, and 12mm width. |
| ACD | Signifies a 25° contact angle and that the bearing is supplied with a preload for high rigidity. |
| HC | Denotes the use of Hybrid Ceramic components, specifically ceramic balls. |
| P4 (in HCP4A) | Corresponds to ABEC-7, specifying an extremely high precision tolerance class for minimal runout and vibration. |
| A (in HCP4A) | Indicates the bearing is sealed on both sides for protected, maintenance-free operation. |
S7203 ACD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of steel rings and ceramic balls significantly reduces friction and heat generation, enabling a high limiting speed of 45,000 rpm. It also provides electrical insulation and superior performance in lubricant-starved conditions.
- Phenolic Resin Cage: This lightweight and robust cage material offers excellent dimensional stability at high speeds, contributing to smooth operation and reduced centrifugal forces.
- 25° Contact Angle & Preload: The optimized contact angle provides an excellent balance between radial and axial load capacity. The factory-applied preload ensures high rigidity and precise shaft positioning, minimizing deflection under load.
- Sealed & Pre-Lubricated: The integral seals protect against contamination and retain lubricant, making the bearing maintenance-free and ideal for life-long lubrication applications within its specified temperature range of -30° to 110°C.
- Super-Precision P4 Tolerance: Manufactured to ABEC-7 (P4) standards, this bearing guarantees exceptional running accuracy, which is critical for applications demanding low vibration and high rotational precision.
S7203 ACD/HCP4A Bearing Typical Application Areas
This bearing is ideally suited for high-speed, high-precision machinery across various industries, including:
- High-Frequency CNC Spindles for milling, grinding, and routing
- Precision Machine Tool main shafts and ball screws
- High-Speed Motors and servo drives
- Aerospace & Defense instrumentation and control systems
- Medical & Dental handpieces and laboratory equipment
- Semiconductor Manufacturing equipment
