7203 CD/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7203 CD/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
17 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
40 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
7.144 mm
Ball quantity
10
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3398 lbf
Radial static load rating
1868 lbf
Limiting speed
103 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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7203 CD/HCP4ADT Bearing Product Overview & Core Advantages
The 7203 CD/HCP4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional performance. This duplex tandem (DT) arrangement bearing set is preloaded and manufactured to ABEC 7 / 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 for critical machinery.
7203 CD/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| 7203 | Basic bearing series, with 17 mm bore, 40 mm OD, and 12 mm width per bearing. |
| C | Specifies a 15° contact angle, optimized for high axial load capacity. |
| D | Indicates the bearing is part of a Duplex set. |
| HC | Signifies the use of Hybrid Ceramic balls (Silicon Nitride), which reduce friction and heat generation. |
| P4A | Denotes a high-precision tolerance class (equivalent to ABEC 7), guaranteeing minimal runout and vibration. |
| DT | Specifies the Duplex Tandem arrangement, where two bearings are mounted together to increase axial load capacity in one direction. |
7203 CD/HCP4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem arrangement and preload create an exceptionally rigid bearing system capable of supporting high combined loads. This configuration significantly increases the axial load capacity compared to a single bearing.
- Superior High-Speed Performance: The combination of a lightweight phenolic resin cage and low-density ceramic balls reduces centrifugal forces, lowers operating temperature, and allows for a very high limiting speed of 103,000 rpm.
- Enhanced Durability and Longevity: Hybrid ceramic construction provides excellent wear resistance, electrical insulation, and the ability to operate with minimal lubrication. The P4A precision ensures smooth, quiet operation with extended service life.
- Pre-Lubricated for Immediate Use: The bearing comes lubricated, ready for installation and immediate operation within its specified temperature range.
7203 CD/HCP4ADT Bearing Typical Application Areas
This high-performance bearing set is ideally suited for applications where high speed, high precision, and high rigidity are paramount. Typical uses include:
- Machine Tool Spindles for CNC milling and grinding machines
- High-frequency Spindles for PCB Drilling
- High-Speed Motors and turbo-molecular pumps
- Precision instruments and medical equipment
