S71905/VA9D1
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71905/VA9D1
Basic Information
System of measurement
Metric
Weight
0.043 kg
Tolerance class
P4
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
42 mm
Outside diameter tolerance
-0.004mm to 0
Width
9 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
18
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1433 lbf
Radial static load rating
855 lbf
Limiting speed
72.5 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Available
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
Price available upon request.
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S71905/VA9D1 Bearing Product Overview & Core Advantages
The S71905/VA9D1 is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. As a single bearing from a universally matchable (SU) set, it offers the flexibility for precise preload configuration. Its key advantages include the ability to handle combined loads (radial and axial) simultaneously, superior running accuracy due to its P4 tolerance class, and high-speed capability supported by a phenolic cage and optimized grease lubrication. This compact bearing is engineered for high rigidity and long-term performance in demanding environments.
S71905/VA9D1 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71905 | Basic designation for a precision angular contact ball bearing with a 25mm bore, 42mm OD, and 9mm width. |
| VA9D1 | Indicates the bearing is part of a Universal Matchable (SU) set. This suffix signifies that two identical bearings can be universally paired (face-to-face, back-to-back, or tandem) to achieve a specific preload level without selective mounting. |
S71905/VA9D1 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust construction enable high rigidity, effectively supporting combined radial and axial loads.
- Precision & High-Speed Performance: Manufactured to P4 tolerance class for exceptional dimensional and running accuracy. The lightweight phenolic cage and optimized internal design contribute to a high limiting speed of 72,500 rpm.
- Universal Matching Capability (SU): As a universally matchable bearing, it simplifies assembly and ensures consistent, predictable performance when used in pairs for applications requiring controlled preload.
- Sealed & Lubricated for Life: The sealed design protects against contamination. Pre-lubricated with grease, it is suitable for the specified temperature range (-30°C to 110°C), offering long-term, maintenance-free operation.
S71905/VA9D1 Bearing Typical Application Areas
This bearing is ideally suited for high-precision, high-speed machinery, including:
- Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors
- Medical and Dental Equipment
- Optical and Measuring Instruments
