Patent ID: 6454640
Filing Date: 2002-09-24
Classification: B24B,F16C

Abstract:
A power tool (10) with a housing (12, 112, 212) and a motor (20, 120, 220), supported in the housing, that has a rotatable drive shaft (22, 122, 222) which is connected operatively by one end to a tool (50, 150), wherein said drive shaft carries a sanding plate that can be equipped with grinding means (52), relative to which sanding plate the drive shaft (22, 122, 222) is rotatably supported by means of a roller bearing with an inner race (28) and outer race (30) spaced apart by a bearing gap (26) and with rotationally fixed and rotatably disposed parts, and is provided with means for removing grinding dust, characterized in that a bearing (425) closely adjacent to any incident grinding dust or chips created has, on at least one side of its bearing gap (26), two sealing disks (38, 40) disposed side by side, wherein one of D, the two sealing disks (38, 40) disposed on one side is a non-grinding sealing disk relative to the inner race (28) of the bearing (425), and the other is a grinding sealing disk, wherein said grinding sealing disk (40) is disposed on the outside of the bearing (425), and the non-grinding sealing disk (38) is disposed on the inside of it, oriented toward the roller bodies.