roll forged HRC 61 DIN338 HSS Cobalt 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.

Detail:

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.