Ceramic Shaft

Semicorex Ceramic Shaft is an outstanding industrial mechanical component that supports extremely demanding applications by being extremely reliable, bolstering its overall performance through its dimensional stability, and enhancing its overall durability and resistance to destructive forces (i.e. wear and tear) through its advanced engineering and advanced ceramic material.

Because the Semicorex Ceramic Shaft is manufactured with advanced technical ceramic material, it provides a combination of hardness, strength, and chemical resistance that makes it an ideal mechanical component for use in precision machinery, industrial pumps, motors and specialized industrial systems, as well as alternative to traditional metal shafts.

Semicorex Ceramic Shaft will exhibit superior tribological (friction related) properties and a lifespan significantly longer than a conventional mechanical component, as demonstrated in over 1,000 hours of continuous operation. When 500V AC is applied to the Ceramic Shaft, the insulation resistance is greater than 5 megohms. This high insulation resistance limits harmful voltage spikes or short-circuiting that would otherwise occur during DC motor operation and extend the life of the motor by offering additional protection to the grease in the bearing and components of the motor circuit board from burning out. The Semicorex Ceramic Shaft is manufactured from silicon carbide ceramic, a material with high hardness and superior wear resistance. Within over 1,000 hours of operation, a negligible amount of wear occurred on the bearing seats of the shaft.

Due to the presence of sector-shaped laminations, stacked silicon steel sheets, core slots, and ventilation holes, the electric motor's magnetic circuit exhibits unbalanced magnetic reluctance. Furthermore, alternating magnetic flux cuts through the shaft, inducing a shaft voltage at both ends. For relatively low shaft voltages, the lubricating oil film still provides protective insulation. When the shaft voltage increases to a certain value (especially during motor startup), before the lubricating oil film inside the bearing has stabilized, the shaft voltage will break down the oil film and discharge. The shaft current discharges from the shaft through the bearing; due to the small contact area, high temperatures are generated instantaneously, causing localized melting of the bearing.

Semicorex ceramic shafts, when subjected to a 600V AC voltage for one minute, exhibit no breakdown or flashover in the ceramic coating, with a leakage current less than 5mA. This protects against the high temperatures generated instantaneously due to the high current density at the metal contact points between the bearing and the shaft, preventing localized melting of the bearing. Silicon carbide material has both acid-base properties, therefore the ceramic coating exhibits strong chemical corrosion resistance, which significantly increases with the increase of the chemical element content in the material.