30220 Tapered Roller Bearing 100x180x37mm Single Row For Gearbox Reducer Product Overview 30220 is open single‑row tapered roller bearing made of GCr15 chrome steel. It handles combined radial and one‑direction axial loads, widely used on heavy‑duty transmission and axle assemblies. Cone and cup are fully separable, you can fit inner and outer parts separately during installation. No built‑in seals, proper grease or oil lubrication is required on site. Preload adjustment is