Standard No.:	JB/T 8825.2-1998
English Name:	Manufacturing tolerances on the threaded portion for whitworth threads taps
Chinese Name:	惠氏螺纹丝锥螺纹公差
Chinese Classification:	J41    Cutting tools
Professional Classification:	JB    Professional Standard - Machinery
ICS Classification:	25.100.50 25.100.50    Taps and threading dies 25.100.50
Source Content Issued by:	National Technical Committee on Standardization of Cutters
Issued on:	1998-12-29
Implemented on:	1999-7-1
Status:	superseded
Superseded by:	JB/T 8825.2-2011 Tool for whinworth threads— Part 2: Manufacturing tolerances on the threaded portion of taps
Superseded on:	2012-4-1
Abolished on:	2012-04-01
Target Language:	English
File Format:	PDF
Word Count:	5500 words
Translation Price(USD):	344.0
Delivery:	via email in 1~3 business day

JB/T 8825.2-1998 本标准参照英国标准 BS 949.2-1979《丝锥规范（第二部分）统一螺纹的丝锥》中相关部分制订。螺纹极限尺寸偏差按 BS 949 的有关规定，对个别有错误的尺寸进行了修改。半角偏差参照我国国家标准 GB/T 968-1994《丝锥螺纹公差》制订。 本标准规定了惠氏加工螺纹丝锥螺纹牙型和尺寸的极限偏差。 本标准适用于惠氏螺纹的丝锥。 本标准于 1998 年 12 月 29 日首次发布。