PS 1364-1975 带有保护斜面的中心孔的中心孔钻．类型B

标准号：PS 1364-1975
中文标准名称：带有保护斜面的中心孔的中心孔钻．类型B
英文标准名称：SPECIFICATION FOR CENTRE DRILLS FOR CENTRE HOLES WITH PROTECTING CHAMFER—TYPE-B
发布日期：1975/1/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：This Pakistan Standard specifies the dimensions of Centre drills for centre holes with protecting chamfer—Type B.It covers only metric dimensions regarded as the only recom mended dimensions in the future for this type of drills.The flutes may be straight or spiral at the option of the manufacturer.Unless otherwise stated these drills will be right-hand cut ting.This Pakistan Standard includes an Annex giving the re commended dimensions for the centre holes, Type B, which can be obtained by a rational use of the centre drills listed in this international Standard.