7219 CD/P4ADBC

• 7219: Basic bearing series, indicating a medium series bore diameter of 95 mm and outside diameter of 170 mm.
• C: Denotes a 15° contact angle, optimized for high-speed performance and moderate axial load capacity.
• D: Indicates that this is a duplex pair of two matched bearings.
• P4A: Specifies the tolerance class, representing very high precision for dimensional and running accuracy.
• DB: Defines the Back-to-Back arrangement. This configuration provides high moment rigidity and excellent stability under complex load conditions.
• C: Specifies the moderate preload (Class C), which minimizes axial and radial play for precise shaft positioning and enhanced stiffness.

High Rigidity & Load Capacity: The duplex Back-to-Back (DB) arrangement creates a wide, stable support system that significantly increases the assembly's resistance to moment loads and tilting. This setup allows the bearing pair to carry substantial combined radial and bidirectional axial loads efficiently.

Precision & High-Speed Performance: Built to P4A tolerance class standards, this bearing ensures minimal runout and vibration. The 15° contact angle and phenolic cage contribute to low friction and low heat generation, enabling stable operation at the high limiting speed of 15,000 rpm.

Optimized Material Selection: The chrome steel rings and balls provide high hardness and durability, while the phenolic cage offers excellent strength-to-weight ratio and smooth operation at high speeds.

This high-precision, high-rigidity bearing pair is ideally suited for applications requiring exceptional accuracy and stability under complex loading. Key industries and machinery include:

• Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
• Precision Gearboxes and High-Speed Drives.
• Industrial Pumps and Compressors.
• Robotic Arms and Automation Equipment.