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roll forged HRC 61 DIN338 HSS Cobalt Twist Drill Bits

roll forged HRC 61 DIN338 HSS Cobalt Twist Drill Bits

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

Product Details:

Place of Origin: JIANG SU CHINA
Brand Name: Starry
Certification: ISO9000
Model Number: 8mm

Payment & Shipping Terms:

Minimum Order Quantity: 300Pcs
Packaging Details: plastic box,pvc bags,Single piece with blister card package
Delivery Time: 30-45days
Payment Terms: T/T, L/C
Supply Ability: 3000000pcs per mouth
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Detailed Product Description
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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Cobalt Twist Drill Bits


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HRC 61 Twist Drill Bits

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.




Contact Details
Jiangsu Xingrui Tools CO.,LTD

Contact Person: Jerry

Tel: +86-15298489260

Send your inquiry directly to us (0 / 3000)


Address: FeiDa indutrial Park,Hou Xiang Town,DanYang City,Jiang Su Province,China.

Factory Address:FeiDa indutrial Park,Hou Xiang Town,DanYang City,Jiang Su Province,China.