Rotary cutter for cutting damaged threads of a bolt

A rotary cutter for cutting damaged threads of a bolt, comprising:

• a body rotatable about a rotating axis, wherein the body includes a connecting end and an operative end opposite to the connecting end along the rotating axis, wherein the body includes an inner periphery delimiting a cutting space extending along the rotating axis from the operative end towards but spaced from the connecting end, wherein a width of the cutting space in a diametric direction perpendicular to the rotating axis gradually reduces from the operative end toward the connecting end to form a conic space, wherein the body further includes at least one cutting blade disposed on the inner periphery delimiting the cutting space, wherein the at least one cutting blade includes a first cutting blade section and a second cutting blade section, wherein the first cutting blade section is arcuate or rectilinear, wherein the second cutting blade section is arcuate or rectilinear, and wherein the first and second cutting blade sections are not identical,
• wherein a first virtual tangent plane extends perpendicularly to the rotating axis and is tangent to the first cutting blade section, wherein a spacing between the first cutting blade section and the rotating axis is smaller than a spacing between any point on the inner periphery of the body delimiting the cutting space and the rotating axis, wherein a second virtual tangent plane extends perpendicularly to the rotating axis and is tangent to the second cutting blade section, wherein a spacing between the second cutting blade section and the rotating axis is smaller than the spacing between any point on the inner periphery of the body delimiting the cutting space and the rotating axis.