A chainsaw (100) includes a power unit and a working assembly powered responsive to operation of the power unit. The working assembly includes a guide bar (120) around which a chain is rotatable. The guide bar (120) includes first and second side plates (200 and 210), a sprocket wheel (220), first and second shims (240 and 242), and first and second sealing members (244 and 245). The first and second side plates (200 and 210) each face other and extend away from a housing (110) to a nose. The sprocket wheel (220) is provided at the nose between the first and second side plates (200 and 210). The first and second shims (240 and 242) are disposed between the first and second side plates (200 and 210), respectively, and corresponding ones of first and second sides of the sprocket wheel (220). The first sealing member (244) is disposed between the first shim (240) and the first side of the sprocket wheel (220). The second sealing member (245) is disposed between the second shim (242) and the second side of the sprocket wheel (220).

A chainsaw (100) includes a power unit and a working assembly powered responsive to operation of the power unit. The working assembly includes a guide bar (120) around which a chain is rotatable. The guide bar (120) includes first and second side plates (200 and 210), a sprocket wheel (220), first and second shims (240 and 242), and first and second sealing members (244 and 245). The first and second side plates (200 and 210) each face other and extend away from a housing (110) to a nose. The sprocket wheel (220) is provided at the nose between the first and second side plates (200 and 210). The first and second shims (240 and 242) are disposed between the first and second side plates (200 and 210), respectively, and corresponding ones of first and second sides of the sprocket wheel (220). The first sealing member (244) is disposed between the first shim (240) and the first side of the sprocket wheel (220). The second sealing member (245) is disposed between the second shim (242) and the second side of the sprocket wheel (220).

The invention relates to a chain saw comprising a guide bar (1) for guiding a saw chain, wherein the guide bar (1) comprises two side plates (2, 3) between which a sprocket wheel (4) is rotatable arranged, wherein the sprocket wheel (4) is supported in the guide bar (1) by means of a bearing (5) and wherein the bearing (5) is supplied by a lubricant by means of a lubrication system (6). To improve the lubrication of the bearing the invention proposes that the lubrication system (6) comprises a lubrication reservoir (7) which is in fluidic connection (8) with the bearing (5), wherein the lubrication reservoir (7) is sealed against the environment by at least one valve element (9).

The invention relates to a chain saw comprising a guide bar (1) for guiding a saw chain, wherein the guide bar (1) comprises two side plates (2, 3) between which a sprocket wheel (4) is rotatable arranged, wherein the sprocket wheel (4) is supported in the guide bar (1) by means of a bearing (5) and wherein the bearing (5) is supplied by a lubricant by means of a lubrication system (6). To improve the lubrication of the bearing the invention proposes that the lubrication system (6) comprises a lubrication reservoir (7) which is in fluidic connection (8) with the bearing (5), wherein the lubrication reservoir (7) is sealed against the environment by at least one valve element (9).