GB/T 1181-1998 in English

VALID

The interference-fit threads

Issued on:1998-08-28
Implemented on:1999-07-01
File Format:PDF
Delivery:Via email within 1~3 business days

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Standard No:	GB/T 1181-1998
Document status:	VALID
Title in English:	The interference-fit threads
Title in Chinese:	过盈配合螺纹
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	1998-08-28
Implemented on:	1999-07-01
Superseding:	GB 1181-1974 The interference-fit threads (Screw into aluminum)
ICS Classification:	21.040-Screw threads
Chinese Classification:	J04-Basic standards and general methods
Professional Classification:	GB-National Standard
Related Keywords:	interference-fit threads screw threads 192-1981 general purpose metric screw threads — basic profile gb/t interference fit threads 197-1981 general purpose screw threads — tolerances
Related Topics:	iso interference thread match Lu Yingying's fake hb243 interference thread pattern Yield billion Surplus trap Lu Yingying's body Yinglun Lu Yingying Zhihu surplus GBT1181 GBT1181-1998 Cooperate Interference thread ring gauge size

《GB/T 1181-1998过盈配合螺纹》由TC108（全国螺纹标准化技术委员会）归口，主管部门为国家标准化管理委员会。
本标准规定了过盈配合螺纹的牙型、直径与螺距系列、公差、旋合长度、技术要求、装配扭矩及标记。本标准适用于螺纹中径具有过盈配合的钢制双头螺柱，与其配合的内螺纹机体材料为铝合金、镁合金、钛合金和钢。有色金属螺柱旋入铝、镁合金机体的过盈螺纹公差见附录A(标准的附录)。

1 Scope

This standard specifies the profiles, diameter and pitch series, tolerances, screwing length, technical requirements, assembly torques and symbols of the interference-fit threads.

This standard is applicable to double end steel studs with an interference fit in the pitch diameter of thread, and the internal thread of the machine body is made of aluminum alloy, magnesium alloy, titanium alloy and steel. See Annex A (Normative) for the tolerances of the non-ferrous metal studs screwed into the interference-fit threads of an aluminum or magnesium alloy body.

2 Normative References

The following normative document contains provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below.

GB/T 192-1981 General Purpose Metric Screw Threads — Basic Profile
GB/T 197-1981 General Purpose Screw Threads — Tolerances and Fits for Diameter from 1 to 355 mm
GB/T 14791-1993 The Terms of Screw Threads

3 Definitions

The terms of screw threads used in this standard shall be in conformity with GB/T 14791.

4 Profile

Basic profiles of screw threads shall be in accordance with the requirements given in GB/T 192.

The profile design of external thread is a smooth connection curve, the requirements of the profile bottom arc shall be in accordance with the requirements of GB/T 197 for property class higher than class 8.8 fastener thread root, and the minimum radius of the profile bottom arc shall not be less than 0.125 P.

Foreword II
1 Scope
2 Normative References
3 Definitions
4 Profile
5 Diameter and Pitch Series
6 Basic Size
7 Tolerance
8 Screwing Length
9 Other Technical Requirements for Thread Parts
10 Assembly Quality Requirements
11 Designation
Annex A (Normative) The Interference Fit Threads for Nonferrous Metal Studs
Annex B (Informative) Calculation Formulae for Thread Tolerance
Annex C (Informative) Calculation Formula of Assembly Torque