BS 919-2-2007 螺纹规限值和公差.惠氏螺纹和B.A.螺纹牙样的螺纹规用规范

标准号：BS 919-2-2007
中文标准名称：螺纹规限值和公差.惠氏螺纹和B.A.螺纹牙样的螺纹规用规范
英文标准名称：Screw gauge limits and tolerances – Part 2: Specification for gauges for screw threads of Whitworth and B.A. forms
标准类型：J05
发布日期：2007/11/30 12:00:00
实施日期：2007/11/30 12:00:00
中国标准分类号：J05
国际标准分类号：21.040.20
引用标准：BS 84;BS 1044-1-1964
适用范围：This Part of BS 919 specifies requirements for the following gaugesintended for checking screw threads in the regular series, suchas BS Whit., BS Fine, B.A., BSC and BS Conduit.a) Screw gauges for general and reference use:1) solid (non-adjustable) screw plug gauges, GO and NOT GO;2) solid and adjustable GO screw ring gauges;3) adjustable thread calliper gauges, GO and NOT GO.NOTE NOT GO effective diameter ring gauges are also included sincethey have certain limited applications. In principle, however, their use isnot recommended.b) Plain plug gauges and plain calliper gauges for the crests of threads.NOTE Provision is made in the standard for both GO and NOT GO plaingauges, but GO plain gauges are normally required only in the case ofthreads where the corresponding GO screw gauges do not control themaximum metal condition at the crests of the threads of the product.c) Setting plugs for adjustable screw ring and thread calliper gauges,GO and NOT GO.This standard may be applied also to gauges for any screw threads ofWhitworth form, but not to gauges for Acme, buttress or round threads.Annex A provides guidance on the various types of gauges.Information relating to the effective diameter equivalent of pitch andangle errors and to the thread form of NOT GO effective diametergauges is given in Annex B, Annex C and Annex D.No requirements are specified for the materials for gauges, butguidance on the hardness of gauges is given in Annex E.