标准摘要
[中文适用范围]： 本国际标准规定了R型圆弧中心孔中心钻的尺寸。本标准仅涵盖公制尺寸，并视为未来此类钻头的唯一推荐尺寸。钻槽可由制造商选择为直槽或螺旋槽。除非另有说明，否则这些钻头均为右旋切削。 [外文原描述]： ISO 2541:2016 specifies the dimensions of centre drills for centre holes with radius ? Type R. It covers only metric dimensions, regarded as the only recommended dimensions in the future for this type of drills. The flutes can be straight or spiral at the option of manufacturer. Unless otherwise stated, these drills are right-hand cutting. Annex A gives the recommended dimensions for the centre holes, Type R, which can be obtained by a rational use of the centre drills listed in this International Standard.
英文名称Centre drills for centre holes with radius form — Type R