71803 CD/P4DBA
71800 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71803 CD/P4DBA
Basic Information
System of measurement
Metric
Weight
0.02 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
17 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
26 mm
Outside diameter tolerance
-0.004mm to 0
Width
10 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
2.381 mm
Ball quantity
18
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
848 lbf
Radial static load rating
720 lbf
Limiting speed
103 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:
$ 131.18
/ each
In Stock
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71803 CD/P4DBA Bearing Product Overview & Core Advantages
The 71803 CD/P4DBA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set features an Extra Light (A) preload and a P4 tolerance class, making it ideal for high-speed spindles and other precision machinery. Its primary advantage lies in its ability to support combined loads (radial and axial) simultaneously while maintaining high running accuracy and system stiffness in a compact envelope.
71803 CD/P4DBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Duplex bearing in a Back-to-Back (DB) arrangement. This configuration provides high moment rigidity. |
| P4 | Indicates a high-precision tolerance class per ISO standards, ensuring minimal runout and superior dimensional accuracy. |
| DB | Specifies the Back-to-Back mounting of the matched pair. |
| A | Denotes an Extra Light preload, which minimizes friction and heat generation, optimizing it for high-speed operation. |
71803 CD/P4DBA Bearing Structural Features & Performance Benefits
- High Rigidity & System Stiffness: The duplex back-to-back (DB) arrangement creates a wide effective spread between load centers, significantly increasing the bearing set's resistance to moment loads and enhancing overall system stability.
- Superior Precision: Manufactured to P4 tolerance class with a 15° contact angle, this bearing ensures extremely low runout and high running accuracy, which is critical for applications like machine tool spindles.
- Optimized High-Speed Performance: The combination of an Extra Light (A) preload and a lightweight, durable phenolic resin cage reduces centrifugal forces and friction, allowing for a high limiting speed of 103,000 rpm.
- Robust Load Capacity: With a dynamic load rating of 848 lbf and a static load rating of 720 lbf, it reliably handles significant combined radial and axial loads.
- Premium Materials: Constructed from chrome steel for both rings and balls, ensuring high durability, wear resistance, and long service life under demanding conditions.
71803 CD/P4DBA Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key sectors include:
- High-Speed Machine Tool Spindles (milling, grinding, drilling)
- Precision Robotic Drives and Arms
- High-Frequency CNC Machining Centers
- Medical and Dental Equipment Spindles
- Aerospace Instrumentation and Guidance Systems
