GB/T 6139-2007 Active National standards

GB/T 6139-2007 Subland twist drills—Technical specifications

GB/T 6139-2007 Subland twist drills—Technical specifications

Publish Date: 2007-07-26 Implement Date: 2007-12-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 6139-2007

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Knives

ICS Name: Drill, reamer, and hobbing cutter

Publish Date: 2007-07-26

Implement Date: 2007-12-01

Pages: 5 pages

Scope

This standard specifies the technical requirements for stepped twist drills (ordinary grade and precision grade) in terms of dimensions, materials and hardness, appearance and surface roughness, marking, and packaging. This standard applies to stepped twist drills used for pre-tapping drilling, as well as other stepped twist drills produced in accordance with GB/T 6138.1 and GB/T 6138.2.

Development Information

Word Count: 6 Thousand words Pages: 5 pages

Replace the following standards

GB/T 6139-1997 Subland twist drills—Technical specifications

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 6138.1-1997 Subland twist drills for holes prior to tapping screw threads—Part 1:The types and dimensions for subland twist drills with parallel shanks 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 6138.2-1997 Subland twist drills for holes prior to tapping screw threads—Part 2:The types and dimensions for subland twist drills with Morse 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

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