S71905 CE/HCP4AQT
Hybrid Ceramic Super Precision Bearings
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S71905 CE/HCP4AQT Bearing Product Overview & Core Advantages
The S71905 CE/HCP4AQT is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional speed and rigidity. This bearing features a Quadruplex Tandem (QT) matched arrangement, where four preloaded bearings function as a single, highly rigid unit. Its construction with a ceramic ball and phenolic cage enables superior high-speed performance and reduced rotational mass. Sealed and pre-lubricated, it offers reliable, long-term operation in combination load scenarios, making it ideal for ultra-precise machinery.
S71905 CE/HCP4AQT Bearing Model Code Explained, Specifications & Naming Convention
- S7: High-precision bearing series with a 15° contact angle.
- 1905: Standard size designation (Bore: 25mm, OD: 42mm, Width: 36mm).
- CE: Designates a ceramic ball material (Silicon Nitride) for high-speed and longevity.
- HC: Indicates a phenolic (Polyamide) cage for reduced weight and excellent high-speed capability.
- P4A: Specifies a super-precision tolerance class (ABEC 7 / ISO P4), ensuring minimal runout and vibration.
- QT: Denotes the bearing is part of a Quadruplex Tandem matched set of 4 bearings, designed to handle substantial axial loads in one direction.
S71905 CE/HCP4AQT Bearing Structural Features & Performance Benefits
Exceptional Rigidity and Load Capacity: The Quadruplex Tandem (QT) arrangement of four preloaded bearings creates an extremely rigid system capable of withstanding heavy combination loads, particularly high unidirectional axial loads. The 15° contact angle is optimized for this load configuration.
Superior High-Speed Performance: The combination of lightweight ceramic balls and a phenolic cage significantly reduces centrifugal forces, allowing for a high limiting speed of 83,000 rpm. This design minimizes heat generation and ensures stable operation at high velocities.
Precision and Longevity: Manufactured to P4A super-precision tolerances, this bearing guarantees high running accuracy. The integral seals and grease lubrication protect against contamination and provide maintenance-free operation throughout its service life.
S71905 CE/HCP4AQT Bearing Typical Application Areas
This bearing is engineered for the most demanding high-speed and high-precision applications, including:
- Machine Tool Spindles: High-speed milling and grinding spindles requiring utmost rigidity and accuracy.
- Precision Robotics: Arm joints and drive systems where high speed and positional accuracy are critical.
- High-Frequency Spindles: PCB drilling and routing equipment.
- Advanced Medical Equipment: Dental handpieces and laboratory centrifuges.
