7216 ACD/P4AQFCC

• 7216: Basic series designation (Bore: 80 mm, OD: 140 mm, Width: 26 mm per bearing).
• A: Denotes a 30° contact angle (Note: Specification states 25°, this is a key design parameter).
• CD: Indicates a duplex pair with a specific preload arrangement.
• P4A: Specifies a high-precision tolerance class exceeding ABEC 7, with focused control on running accuracy.
• QFC: Defines the Quadruplex Face-to-Face matched set configuration of four bearings.
• C: Indicates a Moderate preload (Class C).

The open seal type allows for optimal lubrication flow, while the phenolic cage contributes to high-speed capability and reduced friction.

Unmatched Rigidity and Load Capacity: The quadruplex face-to-face arrangement creates an extremely stiff bearing system, capable of resisting complex moment loads and shaft deflections. With a radial dynamic load rating of 48,600 lbf and a static load rating of 65,250 lbf, this set is built for heavy-duty performance.

High-Speed Precision: The combination of a lightweight phenolic cage, a 25° contact angle, and P4A precision tolerances enables stable operation at high rotational speeds, with a limiting speed of 28,000 rpm. This ensures minimal vibration and superior positional accuracy.

Optimized for Precision Systems: Manufactured from chrome steel and held to tight dimensional tolerances (bore and OD: -0.004mm to 0), this set guarantees consistent, reliable performance in precision spindles and other high-accuracy machinery.

This bearing set is specifically engineered for high-performance applications where maximum rigidity and precision are non-negotiable. Key industries and machinery include:

• High-Speed Machine Tool Spindles (e.g., CNC milling, grinding, and jig boring machines)
• Precision Grinding Spindles
• High-frequency machining centers
• Other industrial machinery requiring preloaded, multi-bearing arrangements for extreme stability.