S71902 ACDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71902 ACDGA/P4A
Basic Information
System of measurement
Metric
Weight
0.016 kg
Tolerance class
P4A
Seal type
Sealed
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
7 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
13
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
848 lbf
Radial static load rating
405 lbf
Limiting speed
95 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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S71902 ACDGA/P4A Bearing Product Overview & Core Advantages
The S71902 ACDGA/P4A is a super-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and high-speed performance. This metric, sealed bearing features a 15 mm bore and is manufactured to an ultra-precise P4A tolerance class, ensuring minimal runout and superior stability. Its core advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high rigidity, making it an ideal solution for high-precision spindles and other critical machinery where accuracy and reliability are paramount.
S71902 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71902 | Bearing series and size designation (15mm bore, 28mm OD, 7mm width). |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Duplex bearing arrangement (two bearings are preloaded as a set). |
| GA | Specific preload level (Extra light / Class A). |
| P4A | Ultra-high precision tolerance class, exceeding ABEC 7 standards. |
S71902 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4A tolerance with extremely tight dimensional tolerances on the bore, outside diameter, and width. This ensures minimal deflection and exceptional running accuracy for high-precision applications.
- Optimized Load Capacity: The 25° contact angle is engineered to efficiently support significant axial loads in one direction, as well as combined radial and axial loads.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling a high limiting speed of 95,000 rpm. The bearing is pre-lubricated with grease suitable for this performance envelope.
- Sealed and Ready-to-Use: The integral seals protect against contamination and retain lubricant, contributing to long service life and maintenance-free operation in clean environments.
- Universal Matching: Designed as a Universal Matchable (SU) bearing, it can be universally paired with other bearings of the same type to form precisely preloaded duplex sets (DB, DF, DT), simplifying assembly and ensuring optimal stiffness.
S71902 ACDGA/P4A Bearing Typical Application Areas
This bearing is engineered for the most demanding high-speed and high-precision machinery, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM applications.
- Medical and Dental Equipment: High-speed handpieces and laboratory instruments.
- Aerospace Instrumentation: Gyroscopes and other critical navigation components.
