S71919 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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S71919 CD/HCP4A Bearing Product Overview & Core Advantages
The S71919 CD/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered as a single, preloaded unit, it delivers superior running accuracy and system rigidity. Its key advantages include the ability to accommodate combined loads (radial and axial), facilitated by its 15° contact angle. The use of ceramic balls and a phenolic cage contributes to lower friction, higher limiting speeds, and extended service life, making it an ideal choice for high-speed, high-rigidity spindle systems.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S | Designates a super-precision bearing series. |
| 719 | Indicates the bearing series with a 15° contact angle. |
| 19 | Specifies the bore diameter code (95 mm). |
| CD | Signifies a preloaded duplex arrangement (back-to-back). |
| HC | Denotes the use of hybrid ceramic balls (Silicon Nitride). |
| P4 | Identifies the tolerance class (P4 / ABEC-7), ensuring ultra-precise dimensions and runout. |
| A | Specifies a contact angle of 15°. |
S71919 CD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Preload: The duplex "CD" arrangement is factory-set with a specific preload, eliminating internal clearance. This provides maximum system stiffness, critical for minimizing deflection under load in precision machinery.
- Superior High-Speed Performance: The combination of hybrid ceramic balls and a lightweight phenolic resin cage significantly reduces centrifugal forces and friction. This allows for a higher limiting speed (11,000 rpm), lower operating temperatures, and reduced power consumption.
- Enhanced Durability and Life: Ceramic balls are harder, lighter, and more resistant to wear and corrosion than steel. They also exhibit electrically insulating properties. This leads to a dramatic increase in bearing service life, especially in challenging environments.
- Exceptional Precision: Manufactured to P4 (ABEC-7) tolerance standards, this bearing guarantees extremely tight dimensional and running accuracy, which is paramount for applications like machine tool spindles.
- Optimized Load Capacity: The 15° contact angle is optimally balanced to handle significant combined radial and axial loads simultaneously.
S71919 CD/HCP4A Bearing Typical Application Areas
The S71919 CD/HCP4A is engineered for the most demanding high-precision and high-speed rotational systems. Its primary applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for aerospace and automotive manufacturing.
- Robotics: High-accuracy rotary joints and arm actuators.
