In order to turn in regard to the frere type hammer assembly item for the rotary cracker, the axis (20) as a center, the base substance which is arranged (12) with, the part where the base substance extends (22) you remove this invention, on and the cutting body which possibly is installed (16) with you include. The profile which extends (50), it is formed on the front of the part which extends vis-a-vis rotation direction, the cutting body (16) inserts securely on that and can be brought together. Profile (50) it is the pad possible with form of the truncated pyramid which extends, that base the front of the part which extends (24) is located on the surface. The cutting body (16) two cutting blades (30,32) it includes and profit, these two cutting blades form the left and right symmetry extending vis-a-vis the surface which is present in tangential line direction vis-a-vis rotary circumference. Passing by the cutting body and the center of profile, can the cutting body, install extending the screw which is present (14) with.
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