71907/VA9D1
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71907/VA9D1
Basic Information
System of measurement
Metric
Weight
0.074 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
55 mm
Outside diameter tolerance
-0.004mm to 0
Width
10 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2077 lbf
Radial static load rating
1395 lbf
Limiting speed
56 X 1000 rpm
Lubrication
Lubricated
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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71907/VA9D1 Bearing Product Overview & Core Advantages
The 71907/VA9D1 is a single row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to simultaneously handle combined radial and axial loads, this bearing features a 25° contact angle for optimal thrust capacity. Its P4 super-precision tolerance class ensures minimal runout and vibration, making it ideal for demanding, high-speed machinery. The Universal Matchable (SU) designation allows for precise preloading when mounted in pairs, delivering superior system stiffness and performance.
71907/VA9D1 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Implication |
|---|---|---|
| 71907 | Basic bearing series designation | Defines the core dimensions: 35mm bore, 55mm OD, 10mm width |
| VA9 | Preload specification | Indicates a specific light preload for enhanced rigidity |
| D1 | Internal design & tolerance class | Confirms P4 super-precision tolerance and optimized internal geometry |
71907/VA9D1 Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: Manufactured to P4 tolerance class with a phenolic resin cage, this bearing provides exceptional dimensional stability and low vibration, crucial for high-speed applications up to 56,000 rpm.
- Superior Load Capacity: The 25° contact angle and chrome steel construction enable it to handle significant combined radial and axial loads (Dynamic: 2077 lbf, Static: 1395 lbf).
- Optimized for Matched Sets: As a Universal Matchable (SU) bearing, it can be precisely paired (2 bearings per set) to create a preloaded arrangement, dramatically increasing system rigidity and accuracy.
- Wide Operating Range: The open design and high-quality materials support a broad temperature range from -30°C to 110°C, accommodating various operational environments.
71907/VA9D1 Bearing Typical Application Areas
This high-precision angular contact bearing is ideally suited for:
- Machine Tool Spindles and high-speed machining centers
- Precision Grinding Spindles requiring minimal runout
- High-Frequency Motors and servo drives
- Medical Equipment spindles and rotary tables
- Aerospace Positioning Systems and instrumentation
