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Precision Redefined: The 71826 C P4A GA Angular Contact Bearing Optimized for 6000–7000 RPM Applications

September 19, 2025 – As precision engineering and high-speed spindle applications continue to push the boundaries of machine tool performance, bearing manufacturers are responding with advanced solutions. One such innovation is the 71826 C P4A GA angular contact bearing, designed specifically for ultra-precise, high-speed operation at rotational speeds of 6000 to 7000 RPM.

Optimized for High-Speed Precision

The 71826 C P4A GA is part of the high-performance 718 series of angular contact ball bearings. Engineered for minimal friction, high stiffness, and excellent thermal stability, this bearing is ideal for:

• CNC machine tool spindles

• High-speed electric motors

• Precision turning and milling centers

Its optimized internal geometry and precision grade P4A (ISO Class 4) make it capable of sustaining both radial and axial loads at elevated speeds, all while maintaining micron-level accuracy.

Understanding the Contact Angle Advantage

The contact angle of a bearing plays a crucial role in how it handles axial and radial loads. The 71826 C P4A GAtypically features a C-type contact angle (15°), allowing for:

• Higher axial load capacity

• Improved rigidity under axial force

• Stable performance at high speeds

For applications demanding different load characteristics, angular contact bearings are also available in ACD (25°), A5 (25–30°), and E (40°) variants, offering flexible design solutions based on axial load demands and spindle orientation.

Key Features of 71826 C P4A GA Bearing

• Bearing Type: Angular Contact Ball Bearing

• Contact Angle: C (15° standard)

• Precision Grade: P4A (Ultra-Precision)

• Speed Range: 6000 – 7000 RPM (depending on lubrication and load)

• Grease Option: Kluberspeed NBU15 (for reduced friction and high-speed reliability)

• Ball Material: G5 grade steel or optional ceramic

• Preload Options: Light, medium, or heavy preload for optimized rigidity

This bearing is designed for use in paired or multiple arrangements (DB, DF, DT, QBC, TBT), allowing for tailored stiffness and load distribution in high-precision applications.