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   Centrifuge system meets heat treatment quality.   

       Product surface quality improvement by oil centrifuge.







NSK bearing in Korea, one of the biggest bearing manufacturer in the world, tried to boost their production as their business expansion. In their quenching oil tank, they put more than double volume of previous production.

As production increased, massive sludge occurred as well, and the massive sludge stuck to the product surface while heat treatment process. Consequently, it made the problem on product surface quality, and they had received complaint by their customer every month.

They were searching for a way to solve the quality problem and reduce sludge in the oil while keeping their productivity.






Previously, NSK was using our PCC602 which was one centrifuge with pumps at their 25,000 liter quenching oil tank. We found that the capacity of centrifuge was not enough to capture the massive sludge, and as we proposed, NSK agreed to install PCC1202 which has two parallel centrifuges with precise pump & motor speed control system. PCC1202 controls the flowrate itself to prevent overflow and detects oil leakage when the oil out.







PCC1202 system demonstrated immediate results. According to maintenance manager from NSK, PCC1202 captured 7kg of carbon sludge in every 24 hours. 3 weeks later, the sludge amount went down to 5kg a day, and the surface quality began improving. 1 month later, finally, all of surface quality problems were fixed.

Now they are proud to choose our PCC1202 system to meet their productivity and quality.


   Oxidized carbon sludge remover in Quenching oil   

       Bearing housing surface quality and brightness improvement.







NSK bearing in Korea, one of the biggest bearing manufacturer in the world, is manufacturing large amount of bearing. One problem they got complaint from their customers, automobile maker, was the black spot on the bearing housing. NSK tried to remove the problem, but it doesn’t work because of the big size of tank(it is about 25,000 liters)

NSK was looking for a way to solve the problem, and finally They contacted SPICO.






We, SPICO needed to know what type of sludge was in the oil. As quenching oil is aging, Sludge is made by oxidation. And the sludge in the quenching oil interrupts the heating function.

SPICO provide PCC602 because of the big tank size, and we also expected there will be a large amount of sludge in the rotor inside.

Sludge amount was checked every 24 hours for 3 weeks. At first, about 3kg of sludge came out, and as time goes by, the sludge amount decreased to less than 2kg.







PCC602 successfully works well for the tank.

As decreasing sludge in tank, the surface problem was gone as well. According to heat treatment manager, ‘Mr. Jung-gi Park’ surface problem was solved as well as brightness also improved. He didn’t expect brightness improvement.

He pretty satisfied with the bearing housing quality by our PCC602, and bought 1 more set to install other quenching oil tank.

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