Sign In | Join Free | My
China Jiangsu Xingrui Tools CO.,LTD logo
Jiangsu Xingrui Tools CO.,LTD
Professional Tools Supplier In China.
Verified Supplier

4 Years

Home > HSS Drill Bits >

8.0mm Black DIN338 Hss4241 Roll Forged Twist Drill Bit

Jiangsu Xingrui Tools CO.,LTD
Trust Seal
Verified Supplier
Credit Check
Supplier Assessment

8.0mm Black DIN338 Hss4241 Roll Forged Twist Drill Bit

  • 1
  • 2
  • 3

Brand Name : Starry

Model Number : 8mm

Certification : ISO9000

Place of Origin : JIANG SU CHINA

MOQ : 300Pcs

Payment Terms : T/T, L/C

Supply Ability : 3000000pcs per mouth

Delivery Time : 30-45days

Packaging Details : plastic box,pvc bags,Single piece with blister card package

Product name : high speed twist drill bit

material : hss4241

Standard : DIN338

Process : Roll Forged

Hardness : HRC 61 - 66

Surface finished : black

Application : HSS Step Drill Bit / Reduced Shank Drill Bit

Contact Now

Black Hss4241 Roll Forged High Speed Twist Drill Bit


Manufactured from hss4241 steel, with molybdenum and cobalt added to creates a hardened alloy, measuring Rockwell hardness up to 67 with 5% Cobalt, for much faster cutting and extra longer life span, with up to twelve times when compared with an average HSS drill bit. No center punch is needed—the 135° Quick-Cut points are self-centering and penetrate quickly with less pressure. Will not "walk" or "wander" Extremely heat resistant; must be used and operated at 1500 RPM or greater for maximum efficiency. Straight shank allows for firmly holding and accurate centering,


Item Name: Black Hss4241 Roll Forged High Speed Twist Drill Bit



ShankHex Shank
ProcessRoll Forged
Surface finishedblack
HardnessHRC 61 - 66

Flute Type

Total Length


Flute Length


UsageHSS Step Drill Bit / Reduced Shank Drill Bit

hss4241 Drill bits Size List :

SizeLimitOverall LenThread LenSize Code


it fit for standard drill chucks and regular round collet chucks Manufactured with all kinds of drill bit for metal,
such as HSS Twist Drill, HSS Center Drill Bit, HSS Step Drill Bits, Reduced Shank Drill Bit, Taper Shank Drill Bits, and etc.

Made into HSS Twist Drill Bits; HSS Step Drill Bit; Taper Shank Drill Bits; Reduced Shank Drill Bits; Bi-metal Hole Saw

Hss cobalt drill bits Quality

Quality inspection is a must before delivery based on Sutek Quality Control Documents or Customer Request Documents.
Hardness test to make sure drill bit with a good heat treatment.
Drilling test to approve our drill bit practicability.
Chemical Analysis for raw materials choice is guaranteed.
Visible Test for how to distinguish the raw materials by experiences.
Drill Bit specification should accord with DIN , ANSI/ASME standard or Tailor-made based on Technical Reference.

Product Tags:

Hss4241 Twist Drill Bit


DIN338 Twist Drill Bit


8.0mm Twist Drill Bit

Quality 8.0mm Black DIN338 Hss4241 Roll Forged Twist Drill Bit for sale

8.0mm Black DIN338 Hss4241 Roll Forged Twist Drill Bit Images

Inquiry Cart 0
Send your message to this supplier
*To: Jiangsu Xingrui Tools CO.,LTD
Characters Remaining: (0/3000)