7003 ACD/HCP4ADBD
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7003 ACD/HCP4ADBD
Basic Information
System of measurement
Metric
Weight
0.066 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
35 mm
Outside diameter tolerance
-0.004mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2385 lbf
Radial static load rating
1395 lbf
Limiting speed
115 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Heavy / Class D
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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7003 ACD/HCP4ADBD Bearing Product Overview & Core Advantages
The 7003 ACD/HCP4ADBD is a precision duplex angular contact ball bearing set designed for applications demanding exceptional rigidity and accuracy. This matched back-to-back (DB) arrangement is preloaded to Heavy / Class D specifications, providing superior stiffness and runout control. Its construction, featuring a phenolic cage and ceramic balls, is optimized for high-speed operation and the ability to handle combined radial and axial loads simultaneously. This bearing set is an ideal solution for high-precision, high-reliability machinery where maximum system rigidity is paramount.
7003 ACD/HCP4ADBD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7003 | Basic bearing series and size designation (17mm bore, 35mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (two-bearing) set. |
| HCP4A | Indicates a high-precision P4A tolerance class and specific internal design/clearance for the matched set. |
| DB | Specifies the Back-to-Back mounting arrangement of the duplex pair. |
7003 ACD/HCP4ADBD Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) configuration with a Heavy preload creates a highly rigid bearing system that effectively resists moment loads and minimizes shaft deflection, ensuring precise rotational accuracy.
- Superior High-Speed Performance: The combination of a lightweight phenolic resin cage and low-density ceramic balls reduces centrifugal forces, lowers operating temperatures, and enables a high limiting speed of 115,000 rpm.
- Enhanced Load Capacity: The 25° contact angle is optimized to handle significant combined loads, providing robust support for both radial and axial forces in demanding applications.
- Precision & Longevity: Manufactured to P4A tolerance class with tight dimensional controls, this bearing ensures smooth, quiet operation and extended service life. The open design allows for customized lubrication schemes to suit specific operational needs.
7003 ACD/HCP4ADBD Bearing Typical Application Areas
This bearing is engineered for the most demanding precision applications, including:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Robotics and Automation Arms
- Advanced Medical and Dental Equipment Drives
- Aerospace Actuators and Instrumentation
