Cutting tool and shrink fitting method for the same

摘要

ÄObjectÜ To make it possible to perform positioning and shrink fitting simply and easily. ÄSolving MeansÜ A guide portion 14 of a tool 12 is inserted into a hole formed in a tool holding portion 3 and performing is executed at room temperature. The outer diameter of a cylindrical tool main body 13 of the tool 12 is D1, and the outer diameter of a cylindrical guide portion 14 coaxially protruding an end surface 13a of the tool main body is D2 (< D1), the inner diameter d of the hole 6 being smaller than D1 and slightly larger than D2 at room temperature. In the condition in which positioning is effected, a support portion 7 of the tool holding portion 7 is heated, whereby the tool main body 13 falls into the hole 6 following the guide portion 14. The difference in size between the outer diameter D1 of the tool main body and the inner diameter d of the hole 6 is the interference.