Standard No.:	GB/T 1217-2004
English Name:	Micrometer for measuring root tangent lengths of gear teeth
Chinese Name:	公法线千分尺
Chinese Classification:	J42    Measuring tool and instrument
Professional Classification:	GB    National Standard
ICS Classification:	17.040.30 17.040.30    Measuring instruments 17.040.30
Issued by:	CISA
Issued on:	2004-8-1
Implemented on:	2004-8-1
Status:	superseded
Superseded by:	GB/T 1217-2022 Micrometer for measuring root tangent lengths of gear teeth
Superseded on:	2023-2-1
Superseding:	GB/T 1217-1986 Gear tooth micrometers
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	60.00
Delivery:	via email in 1~3 business day

本标准规定了公法线千分尺的术语和定义、型式与基本参数、要求、检验方法和标志与包装等。 本标准适用于测量模数等于或大于1mm的齿轮，分度值为0.01mm、0.001mm、0.002mm、0.005mm，测微螺杆螺距为0.5mm或1mm，测微头的量程为25mm，测量上限lmax不应大于200mm的公法线千分尺。