8.0mm Black DIN338 Hss4241 Roll Forged Twist Drill Bit
Black Hss4241 Roll Forged High Speed Twist Drill Bit
Description:
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,
Detail:
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Item Name: Black Hss4241 Roll Forged High Speed Twist Drill Bit |
|
| Material |
hss4241 |
| Shank | Hex Shank |
| Process | Roll Forged |
| Surface finished | black |
| Hardness | HRC 61 - 66 |
| Color | |
| Size | 8.0mm |
|
Flute Type
|
|
| Total Length |
125mm
|
| Flute Length |
81mm
|
| Usage | HSS Step Drill Bit / Reduced Shank Drill Bit |
| Customize | Accepted |
hss4241 Drill bits Size List :
| Size | Limit | Overall Len | Thread Len | Size Code |
| M2.6x0.45 | 6h | 50 | 9 | 7 |
| M3x0.5 | 6h | 56 | 11 | 9 |
| M3.5x0.6 | 6h | 56 | 13 | 10 |
| M4x0.7 | 6h | 63 | 13 | 11 |
| M4.5x0.75 | 6h | 70 | 16 | 12 |
| M5x0.8 | 6h | 70 | 16 | 13 |
| M6x1 | 6h | 80 | 19 | 14 |
| M7x1 | 6h | 80 | 19 | 15 |
| M8x1.25 | 6h | 90 | 22 | 16 |
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 Saw
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.
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