Unit for machining, in particular for machining grooves and separating cuts of a workpiece that preferably consists at least in portions of wood, wood-based materials or plastics material, comprising a main body, a machining tool which is rotatably mounted on the main body, wherein the machining tool comprises a first portion which is configured such that it can penetrate the workpiece during machining of the workpiece in order to produce and/or machine a groove, a conduit means which is arranged next to the machining tool and which is configured such that a medium can flow along, preferably through the conduit means, wherein the conduit means comprises at least one opening at a lower end portion thereof, wherein the conduit means is configured such that the medium can flow out of the opening substantially in the direction of the first portion of the machining tool, wherein the lower end portion of the conduit means comprises at least one nozzle, further comprising a guide element which is arranged next to the machining tool and is thus configured such that particles, in particular dust and/or chips, which can be separated from the workpiece during machining of the workpiece with the machining tool, can be guided in a deflection direction after being separated from the workpiece, wherein the deflection direction extends substantially obliquely with respect to a reference direction (b), wherein the reference direction (b) is defined as a direction from the first portion of the machining tool to a second portion of the machining tool which is opposite the first portion of the machining tool, such that the particles, in particular dust and/or chips, are deflected out of the groove, away from the workpiece. a main body, a machining tool which is rotatably mounted on the main body, wherein the machining tool comprises a first portion which is configured such that it can penetrate the workpiece during machining of the workpiece in order to produce and/or machine a groove, a conduit means which is arranged next to the machining tool and which is configured such that a medium can flow along, preferably through the conduit means, wherein the conduit means comprises at least one opening at a lower end portion thereof, wherein the conduit means is configured such that the medium can flow out of the opening substantially in the direction of the first portion of the machining tool, wherein the lower end portion of the conduit means comprises at least one nozzle, further comprising a guide element which is arranged next to the machining tool and is thus configured such that particles, in particular dust and/or chips, which can be separated from the workpiece during machining of the workpiece with the machining tool, can be guided in a deflection direction after being separated from the workpiece, wherein the deflection direction extends substantially obliquely with respect to a reference direction (b), wherein the reference direction (b) is defined as a direction from the first portion of the machining tool to a second portion of the machining tool which is opposite the first portion of the machining tool, such that the particles, in particular dust and/or chips, are deflected out of the groove, away from the workpiece. a guide element which is arranged next to the machining tool and is thus configured such that particles, in particular dust and/or chips, which can be separated from the workpiece during machining of the workpiece with the machining tool, can be guided in a deflection direction after being separated from the workpiece, wherein the deflection direction extends substantially obliquely with respect to a reference direction (b), wherein the reference direction (b) is defined as a direction from the first portion of the machining tool to a second portion of the machining tool which is opposite the first portion of the machining tool, such that the particles, in particular dust and/or chips, are deflected out of the groove, away from the workpiece.