BEARING UNIT OF TRANSPORTING ROLLER Russian patent published in 2001 - IPC

FIELD: machine engineering, namely bearing assemblies. SUBSTANCE: bearing unit is in the form of removable unit mounted on sleeve rigidly secured to shaft. At outer side of sleeve dust collecting electret cylinder is arranged. Gap between cover of bearing assembly and electret cylinder is in range 0.5-1 mm. On end outer surface of cylinder there are concentrically arranged ridges with apex angle 40-50 deg and with depth 3-5 mm. On generatrix outer surface of cylinder there are coaxially arranged ridges passing along the whole outer surface and also having apex angle 40-50 deg and depth 3-5 mm. Number of ridges on one surface is equal to 5-7. EFFECT: increased useful life period of bearing assembly of transporting roller due to reduced quantity of dust penetrated into assembly. 1 dwg