Arrangement for producing grooves

An arrangement for producing grooves in walls, ceiling and like elements of a structure by a hand-held processing machine having a tool holder, comprising a rotatable material-removing tool having an axis and driven in rotation about said axis by the processing machine, and a housing including a substantially wedge-shaped guiding piece having a bottom wall and two lateral walls and adapted to receive said tool and a slide element mounted on said guiding piece and defining a guiding surface inclined at an acute angle to said axis of the tool and adapted to lie in contact with a wall or ceiling to be machined, said slide element having two opposite members defining said guiding surface, and positioned so as to provide a clearance therebetween through which said tool extends, said tool including a cross-bit having a shaft and a cruciform cutting head on said shaft, said cutting head having a guiding portion which is formed as an axially extending centering point provided cutting blades;

• and a holding device arranged to detachably connect said guiding piece to the processing machine and adjustable relative to said tool in a longitudinal direction of the latter in dependence upon differing lengths of said tool and the tool holder, and also adjustable about a further axis extending transverse to said axis of said tool which accompanying adjustment of said acute angle in dependence upon differing diameters of said tool, each of said guiding members being a bent-off portion of a respective one of said lateral walls of said guiding piece.