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roll forged HRC 61 DIN338 HSS Cobalt Twist Drill Bits

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roll forged HRC 61 DIN338 HSS Cobalt Twist Drill Bits

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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 : HSS Cobalt Twist Drill Bits

material : hss-4341

Standard : DIN338

Process : Full ground

Hardness : HRC 62 - 65

Surface finished : Black

Application : Stainless Steel, copper

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Black Full Ground HRC 61 - 66 DIN338 HSS Cobalt Twist Drill Bits

High Speed Steel Step Drill Bit Description:

Manufactured from Hss-4341 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,

  1. Ground point drill bits suitable for ferrous and non-ferrous metals, offering good drilling speeds and extended working life.
  2. Fast, accurate drilling.
  3. Application: Steel, Cast iron, Aluminium, Malleable Cast iron, Brass, Copper
  4. drill bit with 118° split point tip and optimised flutes offers fast drilling speeds in a contractors, low cost option.


Item Name: High Speed Steel Twist Drill Bit


Shank Straight shank
Process Full ground
Surface finished Black

HRC 61 - 66

Size 8.0mm

Flute Type


Total Length


Flute Length


Usage Drilling Through Sheet Metal
Customize Accepted

hss-4341​ hss drill bit List :

Hss drill bits Application

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 Saws.

Product Tags:

Cobalt Twist Drill Bits


HSS Twist Drill Bits


HRC 61 Twist Drill Bits

China roll forged HRC 61 DIN338 HSS Cobalt Twist Drill Bits wholesale

roll forged HRC 61 DIN338 HSS Cobalt Twist Drill Bits Images

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