S71908 CDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71908 CDGA/P4A
Basic Information
System of measurement
Metric
Weight
0.11 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
62 mm
Outside diameter tolerance
-0.004mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2790 lbf
Radial static load rating
1912 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Grease
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:
$ 88.48
/ each
In Stock
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S71908 CDGA/P4A Bearing Product Overview & Core Advantages
The S71908 CDGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class, this bearing offers extremely tight dimensional and running accuracy. Its 15° contact angle and Extra Light (Class A) preload make it ideally suited for handling combined radial and axial loads simultaneously, providing high rigidity and minimal deflection in precision spindles and other critical machinery.
S71908 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a series of high-precision, high-speed angular contact ball bearings. |
| 1908 | Specifies the bearing size: 40mm bore, 62mm OD, 12mm width. |
| CD | Specifies a 15° contact angle and is designed for Universal Matchable (SU) mounting in pairs. |
| GA | Indicates a phenolic resin cage and grease lubrication from the factory. |
| P4A | Denotes an ultra-high tolerance class with even stricter running accuracy requirements than standard P4. |
S71908 CDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The bearing's P4A tolerance class and Class A preload ensure minimal runout and high system stiffness, which is critical for maintaining accuracy under load.
- Optimized Load Capacity: The 15° contact angle is engineered to efficiently support combined radial and axial loads, making it a robust choice for complex loading conditions.
- Superior High-Speed Performance: The lightweight phenolic cage (GA) reduces centrifugal forces, enabling a high limiting speed of 41,000 rpm. The optimized internal geometry further enhances high-speed stability.
- Ready-to-Install and Matched: As a Universal Matchable (SU) bearing, it can be mounted in pairs (back-to-back or face-to-face) without the need for selective assembly to achieve optimal preload and stiffness.
S71908 CDGA/P4A Bearing Typical Application Areas
This super-precision bearing is engineered for the most demanding applications, 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 machinery.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
