S71918 CE/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71918 CE/P4A Bearing Product Overview & Core Advantages
The S71918 CE/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior rotational accuracy. Positioned in the P4 (ABEC-7) tolerance class, it is designed to handle significant combined loads, including radial loads and axial loads in one direction. Its compact design, featuring a 90 mm bore and 18 mm width, makes it ideal for space-constrained, high-speed applications such as precision spindles. The bearing comes pre-lubricated and is sealed for life, ensuring long-term reliability and minimal maintenance.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S | Designates a bearing with a super-precision level. |
| 7 | Indicates an angular contact ball bearing design. |
| 1918 | Specifies the bearing dimensions (90mm bore, 125mm OD, 18mm width). |
| CE | Indicates a 15° contact angle and specific internal design optimizations for high-speed operation. |
| P4A | Denotes a P4 tolerance class (equivalent to ABEC-7) with specific running accuracy requirements. |
S71918 CE/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4 tolerance class with a 15° contact angle, this bearing provides exceptional running accuracy and axial rigidity, which is critical for maintaining precise positioning under load.
- Optimized for High Speeds: The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and enabling a high limiting speed of 14,500 rpm. The 15° contact angle is ideal for high-speed applications.
- Superior Load Capacity: With a dynamic load rating of 6908 lbf and a static load rating of 5400 lbf, it is engineered to handle demanding combined radial and axial loads.
- Sealed & Lubricated for Life: The sealed design and factory-applied lubrication protect against contamination and provide consistent performance across the specified temperature range (-30°C to 110°C), resulting in a maintenance-free service life.
S71918 CE/P4A Bearing Typical Application Areas
The S71918 CE/P4A is ideally suited for high-performance machinery requiring precision and speed, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Applications
- Medical and Dental Equipment
- Aerospace Instrumentation
