GB/T 6138-2023 in English

VALID

Subland twist drills for holes prior to tapping screw threads

Issued on:2023-09-07
Implemented on:2024-04-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $160.00
$156.00

Standard No:	GB/T 6138-2023
Document status:	VALID
Title in English:	Subland twist drills for holes prior to tapping screw threads
Title in Chinese:	攻丝前钻孔用阶梯麻花钻
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2023-09-07
Implemented on:	2024-04-01
Superseding:	GB/T 6138.1-2007 Subland twist drills for holes prior to tapping screw threads -Part1:The types and dimensions of subland twist drills with cylindrical shanks GB/T 6138.2-2007 Subland twist drills for holes prior to tapping screw threads -Part2:The types and dimensions of Subland twist drills with Morse typer shanks
ICS Classification:	25.100.30-Drills, countersinks, reamers
Chinese Classification:	J41-Cutting tools
Professional Classification:	GB-National Standard
Related Keywords:	subland twist drills step twist drills screw threads introductionthis standard drills twist
Related Topics:	drilling Drill bottom hole Taps and Drills Drilling and tapping quality inspection Medical wire tap

《GB/T 6138-2023攻丝前钻孔用阶梯麻花钻》由TC91（全国刀具标准化技术委员会）归口，TC91SC1（全国刀具标准化技术委员会通用刀具分会）执行，主管部门为中国机械工业联合会。

Introduction

This standard specifies the dimensions and technical requirements for step twist drills used before tapping. It covers aspects such as material selection, geometric parameters, and manufacturing processes to ensure the quality of drilling operations prior to threading. The document aims to provide guidelines for the design, production, and inspection of these specialized tools.

*** Please note: This description may not be accurate, please refer to the official documentation.

More samples: GB 18306-2015 YD/T 3934-2021 NB/T 47013.2-2015

Sample only — not a preview of GB/T 6138-2023

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