Power tool debris management

A power tool comprising:

• a rotatable support arrangement for supporting at least one cutting disc and being configured to be rotatably driven by an electric motor;
• a shroud for restricting the path of debris generated in use and defining a shroud outlet opening through which debris can be sucked by a vacuum device, the shroud having an internal surface;
• a guide part mounted to the internal surface of the shroud, the guide part having a curved wall that projects outwardly therefrom, the curved wall forming a portion of a conduit;
• a sub-volume defined within the shroud, an outlet from the sub-volume in fluid communication with the shroud outlet opening and an inlet thereto distal to the shroud outlet opening in fluid communication with remaining volume in the shroud;
• wherein the inlet to the sub-volume and the outlet from the sub-volume extend along first and second axes in different planes and the conduit, which defines, the sub-volume is configured so debris sucked through the sub-volume undergoes a change in direction by riding along the curved wall providing that debris exits the sub-volume travelling along a direction substantially parallel with the second axis, the curved wall of the conduit having a body that gradually narrows from the inlet to the outlet and defines part of a helix.