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  • The pack twist drill for stainless steel
  • The pack twist drill for stainless steel
  • The pack twist drill for stainless steel

The pack twist drill for stainless steel COSP 8.6

3.80 (5)
COSP 8.6
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25.63 SGD
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Item Feature
Point Angle (Degree)
Blade Diameter D (phi mm)
Helix Angle
Torsion strength
Hard steel Cast iron Stainless steel
Cobalt high-speed steel (high-speed steel) HSSCo
Thinning Shape of Drills
X type thinning
Overall Length L (mm)
Flute Length l (mm)
Customer Reviews
5 star 3
4 star 0
3 star 1
2 star 0
1 star 1
Review Rating: 3.80
5 Customer Reviews
The reviews are automatic translation.
Hole drilling of stainless
From Japan
On 2016-08-15 02:59:32
Straightness at best may last longer than the drill of high-speed steel
This review is about item#05803147.
Drilling in stainless steel
From Japan
On 2015-10-20 15:44:32
Kobelco's drill that he loved for ten years can not be finished, I bought this one which was good for review. However, the sharpness became suspicious from the area where the third hole was opened, and in the fourth hole, the fifth hole, it became almost the same as Kobelco used for 10 years. Is it because it is manufactured abroad (made in Singapore)? It's the worst. I will not buy it anymore.
This review is about item#05803113.
From Japan
On 2014-05-26 13:10:35
I used it to drill a hole in a fairly solid metal (material unknown), but it was not as bad as I thought it was. I was not able to open easily and I made it 1 useless ... It might be a problem of workmanship
This review is about item#05803113.
Steel (stainless steel)
From Japan
On 2013-01-04 18:11:56
I am using it in good condition. We would like to sell 5 sets in all sizes as well.
This review is about item#05803113.
Reaming of pilot holes
From Japan
On 2012-12-12 22:17:15
We are satisfied with processing of difficult-to-cut materials etc. There was a recommendation of a tool shop with dealings, and I was processing difficult-to-cut materials (HRC ≒ 25 steel) with a cobalt drill made by Mitsubishi Materials, but I was in trouble because my teeth were inconspicuous. By using this drill, we could finish machining without problem. I feel that there is also rigidity because the blade length is shorter than the other company's drill and the shank part is long. There are also people who evaluate it as easy to break, but I think that there is no problem in the place I used it.
This review is about item#05803192.