Standard No.:	JB/T 8824.7-1998
English Name:	Thread rolling cylindrical dies for unified threads
Chinese Name:	统一螺纹滚丝轮
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
Issued by:	State Economic and Trade Commission
Issued on:	1998-12-29
Implemented on:	1999-7-1
Status:	superseded
Superseded by:	JB/T 8824.7-2012 Tool for unified threads — Part 7：Thread rolling die
Superseded on:	2012-11-1
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	120.00
Delivery:	via email in 1~3 business day

本标准规定了统一螺纹滚丝轮（以下简称滚丝轮）的型式和尺寸、技术要求、标志和包装的基本要求。本标准适用于加工统一螺纹（ANSI B1.1—82）的滚丝轮。滚丝轮分两种精度等级：1 级和2 级。1级适用于加工公差等级3A级和2A 级的外螺纹。2 级适用于加工公差等级2A 级和1A级的外螺纹。