FIELD: mining industry.
SUBSTANCE: device has tooth holder having aperture for casing, in which tail piece of tooth is placed, while both tooth and casing have head pieces. Head piece of casing has outer engaged surface and inner engaged surface. Outer engaged surface stops against engaged surface of tooth head piece. Inner engaged surface stops against engaged surface of tooth holder. Engaged surface of tooth head piece is made convex and stops against concave engaged surface of tooth holder. Casing for cutting device has outer engaged surface meant for engagement with tooth head piece, and inner engaged surface, meant for engagement to tooth holder. Outer engaged surface is made concave and is meant for engagement with convex surface on tooth head piece. Inner engaged surface is made convex and is meant for engagement with concave surface on tooth holder.
EFFECT: higher durability and reliability.
2 cl, 16 dwg
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