A SPROCKET ASSEMBLY AND A METHOD FOR PREVENTING INGRESS OF DIRT IN A BEARING OF A SPROCKET ASSEMBLY

Disclosed is a sprocket assembly (1) comprising a sprocket (2) including a centre orifice (3) and a bearing (4) located in the centre orifice with an outer part (5) of the bearing fixed in relation to the sprocket. The sprocket assembly also comprises a dust cover (6) fixed in relation to an inner part (7) of the bearing, wherein an outer cover diameter (OCD) of the dust cover is bigger than an outer bearing diameter (OBD) of the bearing, so that an outer periphery (8) of the dust cover is extending radially past the outer part. Furthermore, the sprocket assembly comprises an impeller (9) arranged at the outer periphery of the dust cover, wherein the impeller is fixed in relation to the sprocket.Furthermore, a method for preventing ingress of dirt in a bearing of a sprocket assembly and use of a sprocket assembly is disclosed.