7203 ACD/P4ADBC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7203 ACD/P4ADBC
Basic Information
System of measurement
Metric
Weight
0.13 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
25 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
10
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3285 lbf
Radial static load rating
1800 lbf
Limiting speed
121 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
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7203 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 7203 ACD/P4ADBC is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement provides superior stability and is preloaded to Moderate (Class C) specifications, ensuring minimal axial and radial play under operating conditions. Its primary advantages include high load-carrying capacity for combined radial and axial loads, excellent high-speed performance, and outstanding operational precision, making it ideal for high-reliability machinery.
7203 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7203 | Basic bearing series, indicating a 17mm bore, 40mm OD, and 24mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (Two bearings supplied as a matched set). |
| P4A | High precision tolerance class (equivalent to ABEC 7). |
| DB | Back-to-Back mounting arrangement. |
| C | Moderate preload level (Class C). |
7203 ACD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) configuration creates a wide, rigid support system that effectively resists moment loads and maintains shaft positioning under combined loads.
- Superior Load Capacity: The 25° contact angle and robust construction with 10 precision balls enable high radial dynamic load rating (3285 lbf) and static load rating (1800 lbf), suitable for applications with significant axial and radial force components.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 121,000 rpm. The bearings are pre-lubricated for immediate operation.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on bore, OD, and width, ensuring minimal runout and vibration for smooth, accurate rotation.
- Durable Material Construction: Both rings and balls are made from chrome steel, providing high hardness, wear resistance, and a long service life within a temperature range of -30°C to 110°C.
7203 ACD/P4ADBC Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles for CNC machining centers and grinders
- High-Speed Spindles in precision manufacturing equipment
- Industrial Pumps and Compressors
- Precision Robotics and Automation Systems
- Medical and Dental Equipment Drives
- Aerospace Actuation Systems
