FIELD: manufacture of building materials. SUBSTANCE: crusher rolls have cylindrical perforated casing in the form of rack and pinion drum whose racks are mounted on ring frame supports and drive shaft in the form of rack and pinion drum less than the diameter housing but it has the similar pitch of racks. Roll is loosely mounted inside housing. The housing is set up on drive shaft with its interior surface for possible rolling. EFFECT: enhanced quality of material crushing. 6 cl, 6 dwg
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