Specifications

1 Automatic machions
2 more than 23 years experiance
3 100% HSS material.
4 Experiance

  Straight shank twist drill bit

Dear friend:

First thanks so much for your attention. We produce this all tools not just talking by words.   Please check our goods. Big suprise end of the chinese new year !!!

High quality drills use for all applications.Use right drills can drilling hole easily and quickly. We do this work from 1990 year.

YOFO drills drill the world from north to south from east to west.

Type: Twist Drill Bit

Material:M2,M35,M42,F4341,9341 or 4341. HSS-Co5%

HARDNESS:HSS hrc63-66

                     HSSCO HRC64-68

Manufacturing process:

 Roll ground

fully ground

milled

Point angle: 118 Degree, 135 Split Point

Application: alloy steel, unalloyed Steel, iron, cast iron, non-ferrous metals

International Standard:

Roll Forged       DIN338                   DIN340                       Jobber Length    

Half Ground     DIN338                   DIN340                       DIN1897                                 Jobber Length

Fully Ground     DIN338                  DIN340                    DIN1897                          Aircraft           Extensione                                        

                           JobberLength         Taper Length g           Screw Machine Length

 Milled               DIN340 b               DIN1869                     Aircraft Extension d             Extra Length