S71909 CD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71909 CD/P4A
Basic Information
System of measurement
Metric
Weight
0.13 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
68 mm
Outside diameter tolerance
-0.007mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
23
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2925 lbf
Radial static load rating
2138 lbf
Limiting speed
19 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
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
Price:
$ 424.18
/ each
In Stock
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S71909 CD/P4A Bearing Product Overview & Core Advantages
The S71909 CD/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a single-row bearing with a 15° contact angle, it is optimized to handle combined loads, carrying significant radial loads and axial loads in one direction simultaneously. Manufactured to P4 (ABEC-7) tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed spindles and other precision machinery. The bearing comes pre-lubricated and sealed for immediate use and long-term reliability.
S71909 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Benefit |
|---|---|---|
| CD | A specific internal design featuring a 15° contact angle and optimized internal geometry. | Provides an optimal balance between radial load capacity, axial load capacity, and speed capability. |
| P4A | Indicates a P4 tolerance class with specific dimensional and running accuracy requirements tighter than standard P0. | Ensures high precision, reduced vibration, and superior performance in demanding applications like machine tool spindles. |
S71909 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row design with a 15° contact angle and P4 precision provides stable and rigid support for shafts, minimizing deflection under load and ensuring exceptional running accuracy.
- Superior Load Capacity: Engineered to support combined loads effectively, with a high dynamic load rating of 2925 lbf, making it suitable for applications with significant radial and one-direction axial forces.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 19,000 rpm. The 15° contact angle is ideal for high-speed operation.
- Sealed and Lubricated for Life: The sealed design with factory-applied lubrication protects against contamination and retains grease, offering a maintenance-free solution within its specified temperature range (-30° to 110 °C).
S71909 CD/P4A Bearing Typical Application Areas
This bearing is commonly specified in high-performance machinery where precision and speed are critical. Key sectors include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives: Servo motors, high-frequency spindles.
- Medical Equipment: Dental handpieces, centrifuges.
- Robotics: High-accuracy robotic arm joints and drives.
