Carbide coating of a bearing of a high end screw pump

The photos show the chromium carbide coating before grinding of the lower bearing of a high end screw pump.

The biggest diameter is 1300mm.

These screw pumps are often used in big water cleaning installations around the world.

This chromium carbide coating combines high wear resistance with an excellent corrosion resistance.

Because of the tuned surface characteristic the roughness is optimized for excellent running- and sliding properties.

This self adjusting lower bearing only takes up radial forces and allows free thermal expansion of the screw.

The lower bearings are mounted in a cast-iron housing.

Different types of lower bearings are available: grease lubricated, oil lubricated or without lubrication (ecological bearings).




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