71907 CEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71907 CEGA/P4A
Basic Information
System of measurement
Metric
Weight
0.075 kg
Tolerance class
P4A
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
15 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
19
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1755 lbf
Radial static load rating
1046 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
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:
$ 90.2
/ each
In Stock
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71907 CEGA/P4A Bearing Product Overview & Core Advantages
The 71907 CEGA/P4A is a super-precision angular contact ball bearing designed for the most demanding applications. Engineered to P4A tolerance class, it delivers exceptional running accuracy and rotational stability. Its primary advantage lies in its ability to handle combined loads—simultaneously supporting significant radial loads and axial loads in one direction. The extra light preload (Class A) minimizes deflection under light loads, making it ideal for high-speed spindles and other precision machinery requiring minimal runout and vibration.
71907 CEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing series, indicating a super-precision, light series angular contact bearing with a 35mm bore, 55mm OD, and 10mm width. |
| C | A 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| EGA | Identifies the bearing as Universal Matchable (SU). This means it is manufactured to universal matching standards and can be paired with another identical bearing in a back-to-back (DB) or face-to-face (DF) arrangement without requiring selective assembly to achieve a specific preload. |
| P4A | The tolerance class, equivalent to ABEC 7. This denotes very tight tolerances on bore diameter, outside diameter, and width, as well as strict requirements for running accuracy. |
71907 CEGA/P4A Bearing Structural Features & Performance Benefits
- Super-Precision Performance: Manufactured to P4A tolerance class, this bearing ensures extremely low noise, minimal vibration, and superior rotational accuracy, which is critical for applications like machine tool spindles.
- High-Speed Capability: The 15° contact angle and phenolic resin cage are key to its high-speed performance. The lightweight phenolic cage reduces centrifugal forces, contributing to a limiting speed of 56,000 rpm.
- Universal Matching Design (SU): The EGA suffix signifies that bearings are universally matchable. This simplifies mounting and inventory, as any two bearings can be paired to form a preloaded set, enhancing system rigidity and simplifying procurement.
- Optimized Material Selection: Constructed from high-grade chrome steel for both rings and balls, providing excellent wear resistance and durability. The standard lubrication is suitable for the specified operating temperature range.
71907 CEGA/P4A Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, speed, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives: High-frequency motors and spindles.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units.
- Medical Equipment: Dental handpieces and high-speed centrifuges.
