71902 CE/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71902 CE/P4ADBA
Basic Information
System of measurement
Metric
Weight
0.03 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
15 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
28 mm
Outside diameter tolerance
-0.004mm to 0
Width
14 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1170 lbf
Radial static load rating
619 lbf
Limiting speed
140 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
In Stock
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71902 CE/P4ADBA Bearing Product Overview & Core Advantages
The 71902 CE/P4ADBA is a precision angular contact ball bearing designed for high-speed applications demanding exceptional rotational accuracy. This duplex back-to-back (DB) matched set delivers superior system rigidity and is capable of handling combined loads (radial and axial). Manufactured to P4A tolerance class with an extra light preload, it ensures smooth operation and precise positioning in demanding machinery.
71902 CE/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71902 | Basic bearing designation (ultra-light series, 15mm bore, 28mm OD). |
| CE | High-capacity, optimized internal geometry for enhanced performance. |
| P4A | High precision tolerance class (exceeds ABEC 7), ensuring minimal runout and vibration. |
| DB | Duplex Back-to-Back arrangement. Provides high moment stiffness and accommodates axial loads from both directions. |
| A | Extra light preload. Minimizes deflection and ensures precise shaft positioning under light loads. |
71902 CE/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) configuration creates a rigid bearing system that effectively resists moment loads and supports significant combined radial and axial loads.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the optimized internal 15° contact angle and factory lubrication enable stable operation up to the limiting speed of 140,000 rpm.
- Exceptional Precision: Manufactured to P4A tolerance class with a 15 mm bore diameter and tight dimensional tolerances, this bearing guarantees minimal runout for applications requiring extreme accuracy.
- Optimized Material Selection: Components made from chrome steel offer high hardness and durability, contributing to a long service life under demanding conditions.
71902 CE/P4ADBA Bearing Typical Application Areas
This bearing is ideally suited for high-precision, high-speed machinery, including:
- Machine Tool Spindles
- High-Frequency Electric Spindles
- Precision Grinding Applications
- High-Speed Robotics and Automation
- Medical and Dental Handpieces
- Aerospace Instrumentation
