GB/T 6138-2023 Active National standards

GB/T 6138-2023 Subland twist drills for holes prior to tapping screw threads

GB/T 6138-2023 Subland twist drills for holes prior to tapping screw threads

Publish Date: 2023-09-07 Implement Date: 2024-04-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 6138-2023

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Knives

ICS Name: Drill, reamer, and hobbing cutter

Publish Date: 2023-09-07

Implement Date: 2024-04-01

Pages: 10 pages

Scope

This document specifies the symbols, types, and sizes of Morse taper-shank stepped twist drills and straight-shank stepped twist drills (ordinary and precision grades) for drilling before tapping threads, as well as marking examples and technical requirements.
This document is applicable to:
——The manufacture of Morse taper-shank stepped twist drills for drilling before tapping ordinary threads with M8 to M30 thread sizes;
——The manufacture of straight-shank stepped twist drills for drilling before tapping ordinary threads with M3 to M14 thread sizes.
The relationship between the symbols in this document and those in the ISO 13399 series of documents is described in Appendix A.

Development Information

Word Count: 21 Thousand words Pages: 10 pages

Replace the following standards

GB/T 6138.1-2007 Subland twist drills for holes prior to tapping screw threads—Part 1: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—Part 2:The types and dimensions of subland twist drills with Morse typer shanks

Referenced Standards

GB/T 1442-1985 Driving tenons and sockets for parallel shank tools— Dimensions and tolerances GB/T 1442-2004 Driving tenons and sockets for parallel shank tools—Dimensions GB/T 1443-1996 Machine tools—Self-holding tapers for tool shanks GB/T 1443-2016 Self-holding tapers for machine tools and tool shanks GB/T 1804-2000 General tolerances for linear and angular dimensions without individual tolerance indications GB/T 6139-1997 Subland twist drills—Technical specifications GB/T 6139-2007 Subland twist drills—Technical specifications

Adopt standards

ISO 3438:2013

Related Standards

GB/T 4267-1984 Replaced

GB/T 4267-1984 Rotating tools with parallel shanks—Diameters of shanks and sizes of driving squares

Publish Date: 1984-03-28

GB/T 14299-1993 Replaced

GB/T 14299-1993 Spiral flute drill with indexable inserts

Publish Date: 1993-04-17

GB/T 14332-1993 abolished_transferred

GB/T 14332-1993 Ejector drills with carbide tips

Publish Date: 1993-04-17

GB/T 1438.1-1996 Replaced

GB/T 1438.1-1996 Taper shank twist drills—Part 1:The types and dimensions for Morse taper shank twist drills

Publish Date: 1996-07-05

GB/T 1438.2-1996 Replaced

GB/T 1438.2-1996 Taper shank twist drills—Part 2:The types and dimensions for long Morse taper shank twist drills

Publish Date: 1996-07-05

GB/T 1438.3-1996 Replaced

GB/T 1438.3-1996 Taper shank twist drills—Part 3:The types and dimensions for lengthened Morse taper shank twist drills

Publish Date: 1996-07-05