... row and four row tapered roller bearings.Industrial application of tapered roller bearingsTapered roller bearings apply to automobile rolling ... mill mine metallurgy plastics machinery etc The series of tapered roller bearings30200 series, 30300 series, 32200 series, ... INA, KOYO, etc. Our bearings are made in all kinds of materials: ZrO2, Si3N4, plastic,stainless steel, chromium steel, etc ...