Bit holder equipped with a spraying device

Bit holder equipped with a spraying device which includes a nozzle, in particular for cutting heads, comprising a receiving bore having an open outer end, said receiving bore being separate from the nozzle and receiving and supporting the shaft of the bit for limited axial shifting movement and optionally for being rotated, shifting movement of the bit shaft in direction of the cutting pressure being limited by an abutment and the bit shaft being loaded by a return force in opposite direction to the cutting pressure and a valve for the supply of water to the bit or to the drift face during cutting operation being arranged within the bit holder and being opened under the action of the cutting pressure by the axial shifting movement of the bit shaft, characterized in that the receiving bore is at least partially closed at its end located remote from the bit tip, in that the housing of the valve is arranged within the receiving bore at its deepest area and coaxially relative to this receiving bore, the end of the bit shaft located remote from the bit tip being acting on the valve shaft of the valve, and in that the wall of the receiving bore has between the seat of the valve and the mouth of the receiving bore and at an axial distance from the mouth of the receiving bore which is greater than or equal to the axial depth over which the bit shaft protrudes into the receiving bore in its position engaging the abutment at least one perforation opening at the exterior side of the bit holder.