Hack knife roll (1) for a wood chopper with at least two parallel spaced from one another coaxially on a roll shaft (2) of roller discs (3) is arranged, whereby at the mutually facing side surfaces of adjacent roller discs (3) corresponding knife carriers (6) for the receiving, in each case, a knife cassette (5) are provided, characterised in that the blade holder (6) at each rolling disk (3) as a recess (9) is designed, in which the knife cassette (5) with their side walls is accommodated, wherein the to the outer circumference of the rolling disk (3) directed, outer boundary surface (10) of the recess (9) at least a partial region of the upper side of the in the recess (9) engages over the knife cassette (5) and wherein the depth of the recess (9) is dimensioned smaller than the thickness of the rolling disk (3).
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