S71918 CB/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71918 CB/P4A
Basic Information
System of measurement
Metric
Weight
0.61 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
90 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
125 mm
Outside diameter tolerance
-0.009mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
36
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
4005 lbf
Radial static load rating
3960 lbf
Limiting speed
14 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:
$ 1309.27
/ each
In Stock
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S71918 CB/P4A Bearing Product Overview & Core Advantages
The S71918 CB/P4A is a high-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—significant radial loads alongside one-directional axial loads. Manufactured to a P4 (ABEC-7) tolerance class, it ensures ultra-precise running accuracy. Its preloaded configuration eliminates internal clearance, providing high system stiffness, reduced noise, and precise shaft positioning, making it ideal for high-speed, high-reliability spindles and precision machinery.
S71918 CB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CB | Specifies a specific internal clearance and preload grade. In this configuration, it indicates a light preload for enhanced rigidity and precise rotational performance. |
| P4A | Denotes the tolerance class. P4 is equivalent to ABEC-7, specifying very high precision for dimensions and running accuracy. The "A" may indicate specific tolerance modifications for the contact angle. |
S71918 CB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row design with a 15° contact angle and CB preload provides high axial and radial stiffness, ensuring minimal deflection under load and superior running accuracy for demanding applications.
- Optimized Load Capacity: Engineered to support combined loads effectively, with a dynamic load rating of 4005 lbf and a static load rating of 3960 lbf, offering reliable performance in rigorous operating conditions.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling a high limiting speed of 14,000 rpm. The standard lubrication further supports smooth, high-velocity operation.
- Durability and Reliability: Constructed from chrome steel for both rings and balls, this bearing offers excellent wear resistance and long service life. The sealed design protects against contamination.
S71918 CB/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Robotics (Articulated arms, rotary joints)
- High-Frequency Motors and Spindles
- Medical Equipment (Dental handpieces, imaging scanners)
- Aerospace Instrumentation (Gyroscopes, navigation systems)
