PROBLEM TO BE SOLVED: To provide a cutting head for a rotary cutting tool that can prevent or reduce entanglement of resin and premature wastage of a product.SOLUTION: A cutting head 1 comprises a shaft part 12 having an attaching part 11 attached to a handpiece of a rotary cutting tool and a cutting blade part 13 of this shaft part tip. The cutting blade part has multiple axial grooves 15 and multiple axial blades 16. At least one rather deep groove 18 of the circumferential direction is provided in the cutting blade part 13. In the case of material for use in a rotary cutting instrument used for dental technique, it is preferable that a groove depth is 0.3 mm to 2.0 mm, a groove width is 0.5 mm to 2.0 mm in a surface position, and the number of pieces is 1 to 5 pieces.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】樹脂の絡み付きや製品の早期消耗を防止又は減少させることのできる回転切削工具用切削ヘッドを提供する。【解決手段】回転切削工具のハンドピースへ取り付ける取付部11を有する軸部12と、この軸部先端の切削刃部13からなり、切削刃部が複数の軸方向の溝15と複数の軸方向の刃16を有する切削ヘッド1である。切削刃部13に周方向のやや深い溝18を少なくとも1本設けている。歯科技工に使われる回転切削器具に用いるものの場合、溝の深さが0.3mm~2.0mm、溝幅が表面位置において0.5mm~2.0mm、本数が1~5本であることが好ましい。【選択図】図2
