7203 ACD/P4ADBA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7203 ACD/P4ADBA
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
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 92.64
/ each
In Stock
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7203 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 7203 ACD/P4ADBA is a metric precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. This bearing is supplied as a duplex back-to-back (DB) matched pair with an Extra Light (Class A) preload, making it ideal for spindle arrangements where high system stiffness and precise rotational accuracy are paramount. Its 25° contact angle is optimized to support significant combined loads, handling both radial and axial forces simultaneously. Manufactured to the stringent P4A tolerance class, it ensures superior running accuracy and consistent performance in high-speed, high-precision environments.
7203 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7203 | Basic bearing series and size designation (17mm bore, 40mm OD). |
| AC | Angular Contact ball bearing. |
| D | Duplex (Two single bearings are paired). |
| P4A | High precision tolerance class, exceeding ABEC 7 standards, with specific running accuracy requirements. |
| DB | Matched arrangement: Back-to-Back. This configuration provides high moment rigidity. |
| A | Preload level: Extra Light (Class A). |
7203 ACD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Moment Load Capacity: The duplex back-to-back (DB) arrangement creates a wide effective spread between the load centers, significantly increasing the bearing's ability to resist moment loads and providing exceptional system stiffness.
- Optimized for Combined Loads: The 25° contact angle is engineered to efficiently support substantial radial and axial (thrust) loads in combination, a critical requirement for machine tool spindles.
- Superior High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 121,000 rpm (grease lubricated). The bearings are pre-lubricated for immediate operation.
- Precision & Accuracy: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, ensuring minimal runout and vibration for ultra-precise applications.
- Premium Material Construction: Made from high-grade chrome steel for both rings and balls, ensuring high durability, long service life, and consistent performance under demanding conditions.
7203 ACD/P4ADBA Bearing Typical Application Areas
This bearing is specifically engineered for high-performance machinery where precision and speed are critical. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for electric motors requiring high rotational accuracy.
- Robotic Drives: High-accuracy joints and rotary actuators.
