S71917 CE/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S71917 CE/P4A Bearing Product Overview & Core Advantages
The S71917 CE/P4A is a single-row angular contact ball bearing engineered for applications demanding exceptional precision and reliability. This P4 (ABEC-7) tolerance class bearing is designed to handle significant combined loads, primarily thrust loads in one direction, with a 15° contact angle that optimizes performance. Its key advantages include high operational accuracy, superior high-speed capability with a limiting speed of 15,500 rpm, and immediate readiness for use due to factory-applied lubrication. The compact design, featuring an 85 mm bore and 18 mm width, makes it ideal for space-constrained, high-performance assemblies.
S71917 CE/P4A Bearing Model Code Explained, Specifications & Naming Convention
- S: Denotes a bearing from a specific high-precision series.
- 7: Indicates an angular contact ball bearing design. 1917: Specifies the dimensional series; '17' corresponds to a bore diameter of 85 mm.
- CE: Signifies a specific internal design with a 15° contact angle and optimized internal geometry for high-speed operation and low torque.
- P4A: Defines the tolerance class. P4 is equivalent to ABEC-7, indicating very high precision. The A suffix indicates a specific tolerance range for the bore and outside diameter.
S71917 CE/P4A Bearing Structural Features & Performance Benefits
High-Precision Construction: Manufactured to P4 tolerance standards with a phenolic resin cage, this bearing ensures minimal vibration and smooth operation at high speeds, contributing to its high rotational accuracy.
Superior Load Capacity: The 15° contact angle and robust construction using chrome steel for rings and balls enable it to support high radial dynamic load ratings of 6660 lbf and static load ratings of 5130 lbf, effectively managing combined loads.
Optimized for High Speeds: The lightweight phenolic cage reduces centrifugal forces, allowing for a high limiting speed of 15,500 rpm. This makes it an excellent choice for high-speed spindles and other rapid-rotation applications.
Pre-Lubricated & Sealed: Factory-applied lubrication ensures immediate operation and consistent performance within a temperature range of -30°C to 110°C. The sealed design protects against contamination, enhancing service life and reliability.
S71917 CE/P4A Bearing Typical Application Areas
The S71917 CE/P4A is ideally suited for high-precision, high-speed machinery across various industries. Its primary applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring extreme precision and rigidity.
- Precision Gearboxes: In applications demanding low noise, high speed, and accurate rotational control.
- High-Frequency Motors and Spindles: Used in PCB drilling, dental handpieces, and other small, high-RPM applications.
- Aerospace and Defense Systems: In gyroscopes, navigation instruments, and other critical control mechanisms.
