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
|Hardness||HRC 61 - 66|
|Usage||HSS Step Drill Bit / Reduced Shank Drill Bit|
hss4241 Drill bits Size List :
|Size||Limit||Overall Len||Thread Len||Size 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
Drill Bit specification should accord with DIN , ANSI/ASME standard
or Tailor-made based on Technical Reference.