Description
This premium quality, specialised, precision Cobalt Metal HSS drill bit contains Cobalt for extreme performance and/or specialised materials. This drill bit is only suitable for advanced skilled level users. Our 25 Piece Cobalt Metal Drill Bit Set consists of drill bits between 1-13mm.
- Made of High Speed Steel with 5% Cobalt content
- Precision ground
- Split point to prevent bit wandering
Metal drill bit selection chart
Matching the correct drill bit to the intended application will maximise the life of the bit.
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Recommended drilling speeds in Metal
Use the correct drill speed to ensure the ideal drill bit performance in the material being drilled.
Slide to view full table.
Drill Size |
|
1mm |
2mm |
3mm |
4mm |
5mm |
6mm |
7mm |
8mm |
9mm |
10mm |
11mm |
12mm |
13mm |
Stainless Steel |
3182 |
1591 |
1061 |
795 |
636 |
530 |
455 |
398 |
354 |
318 |
289 |
265 |
245 |
Cast Iron |
4773 |
2386 |
1591 |
1193 |
955 |
795 |
682 |
597 |
530 |
477 |
434 |
398 |
367 |
Plain Carbon Steel |
6364 |
3182 |
2121 |
1591 |
1273 |
1061 |
909 |
795 |
707 |
636 |
579 |
530 |
490 |
Bronze |
7955 |
3977 |
2652 |
1989 |
1591 |
1326 |
1136 |
994 |
884 |
795 |
723 |
663 |
612 |
Brass |
9545 |
4773 |
3182 |
2386 |
1909 |
1591 |
1364 |
1193 |
1061 |
955 |
868 |
795 |
734 |
Copper |
11136 |
5568 |
3712 |
2784 |
2227 |
1856 |
1591 |
1392 |
1237 |
1114 |
1012 |
928 |
857 |
Aluminium |
12727 |
6364 |
4242 |
3182 |
2545 |
2121 |
1818 |
1591 |
1414 |
1273 |
1157 |
1061 |
979 |
