FIELD: spiral cutting of tubular materials. SUBSTANCE: coil for material is installed coaxially to mandrel. Introduced between coil and means for pulling material from coil is means for changing over material from position square to mandrel axis to position coaxial to mandrel. Cutting unit is rigidly installed and unwinding unit and means for placing material to position coaxial to mandrel are installed for combined rotation. EFFECT: higher efficiency. 2 cl, 3 dwg
