Round shaft chisel for coal cutting machine

摘要

The round shaft chisel, for a coal cutting machine etc., has recesses (17) at the largest diameter of the circumference of the base section (16). Intermediate pieces (17a) are between the recesses, extending up to the maximum diameter of the chisel tip. The recesses lead up to the upright surfaces of the chisel point on the chisel head. The recesses form a unit to an inner part-circle round the center axis of the chisel tip, recessed in the base section. The chisel tip (10) has a star-shaped outer contour through the base section, on the center axis.