The invention discloses a pneumatic rotary tool, which comprises a
compressed air conveying mechanism, a rotating mechanism for carrying out rotary movement under the action of
compressed air output by the conveying mechanism, and a tool subassembly for carrying out rotary
cutting movement under the action of the rotating mechanism. The pneumatic rotary tool is characterized in that the air conveying mechanism comprises an air inlet
pipe, an air
pipe joint, an air inlet shaft, an air outlet shaft, a motor base and a motor
stator, which are orderly connected and form an air conveying channel, and the rotating mechanism comprises a
motor shaft and a blade, and the blade and the
motor shaft carry out rotary movement under the action of the
compressed air so as to drive a tool to carry out rotary
cutting movement. The pneumatic rotary tool has the advantages that: firstly, the defects on the technical level and proficiency of a worker are overcome; secondly, the condition that a
cutting die for a cutting
bed cuts the profile shape is overcome by matching with
software of a cutter; the profiling and small-
batch production time in the clothing industry is effectively saved, and finally, the phenomenon of
charring of the cutting edge when the
laser cutter cuts fibers and non-woven fabrics by a
laser is overcome because a circular knife is adopted to
cut.