Low Particle Generating Grease / KURODA C-Grease

C-Grease helps to reduce particle generation when using motion control components in semiconductor manufacturing machines and electronic component manufacturing equipment.

KURODA C-Grease offers superior torque stability and reduced particle generation when compared to standard fluorine grease. Use with a grease gun for additional ease of application.

Safety Data Sheet

Features

Performance / Specifications

Number of particles from ball screw (particle size 0.13 μm or more)

Test conditions

Ball screw shaft diameter: 20 mm
Lead: 20 mm
Preload: 800 N
Rotational speed: 1200min^-1
Stroke: 250 mm
Amount of grease: 1 cc
Measurement interval: 1 h

Number of particles from ball screw (particle size 0.13 μm or more)

Test conditions

Ball screw shaft diameter: 20 mm
Lead: 20 mm
Preload: 800 N
Stroke: 250 mm
Amount of grease: 1 cc

Values shown are mean values taken after 100 measurements for each rotational speed. The operating time of the ball screw during these measurements is about 240 hours.

Lubricating performance: Comparison of grease resistance

Values shown are the maximum current value ratio at 500 mm/s (1500 min^-1) for a single-axis robot.
The value of the drive motor current is proportional to the load torque.
Therefore, the larger the current value is, the larger the grease resistance becomes (rotation becomes slower).

Torque characteristics: change in preload torque over operating time

Appearance of screw grooves after testing (electronic microscope pictures)

	Screw shaft	Nut
KURODA C Grease
Grease for optical instruments
Lithium grease

Attention

Before using C grease, carefully read the precautions on the “Safety Data Sheet” (SDS) for the oil type. For the “Safety Data Sheet”, please contact us.