The NTN 7908CG/GNP4 is a single-row angular contact ball bearing from NTN’s Precision Bearing (GNP4) Series, specifically designed for high-speed and high-accuracy applications such as CNC spindles, robotics, and precision machinery.

Built with ceramic balls (CG type) and super-finished steel rings, this bearing provides exceptional rotational accuracy, low heat generation, and extended service life even under demanding speed and load conditions. The GNP4 precision rating (ABEC-7 equivalent) ensures tight dimensional tolerances and smooth operation, essential for machine tool performance.

Specifications:

• Brand: NTN

• Model: 7908CG/GNP4

• Type: Angular Contact Ball Bearing

• Precision Class: GNP4 (ISO Class P4 / ABEC-7)

• Contact Angle: 15° (typical for high-speed applications)

• Ball Material: Ceramic (CG = Ceramic Grade)

• Bore Diameter: 40 mm

• Outer Diameter: 62 mm

• Width: 12 mm

• Cage Type: Polyamide / Phenolic Resin (depending on series)

• Construction: Single-row

• Lubrication: Grease or oil (depending on configuration)

• Speed Capability: Very high-speed operation suitable for spindle use

Applications:

• CNC machine tool spindles

• Precision machining centers

• Robotics and servo systems

• High-speed motors and turbines

• Automation equipment

Benefits:

• Ultra-high rotational accuracy (P4 class)

• High-speed capability with ceramic balls

• Low friction and reduced heat generation

• Long service life under heavy-duty use

• Stable and smooth operation

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