FIELD: mechanical engineering. SUBSTANCE: circular saw has casing of variable stepped thickness and teeth provided with prismatic projections for joining hard-alloy plates thereto. Teeth projection surfaces and related plate surfaces are made with similar angles between prism faces (of at least 40 deg). Thickness of saw casing peripheral part does not exceed 2/3 the thickness of its central part. EFFECT: increased efficiency and enhanced reliability in operation. 4 dwg
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