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How to drill hardened steel
| Men Ifr | 13/11/2016 14:48:59 |
| 119 forum posts 10 photos | Woops i think I got cobalt and carbide mixed up for the drill bits I was looking at. As usual one here it would seem i am trying to drill a 5mm hole in a digital caliper to make a dro. |
| Les Jones 1 | 13/11/2016 15:07:01 |
| 2292 forum posts 159 photos | Digital calipers are are made of stainless steel I have drilled them using cobalt drill bits from Arc Euro. (I think I have drilled some using normal high speed steel drill bits. ) Les. Edited By Les Jones 1 on 13/11/2016 15:08:51 Edited By Les Jones 1 on 13/11/2016 15:10:37 |
| Men Ifr | 21/11/2016 20:15:37 |
| 119 forum posts 10 photos | In the end I tried a cheap spear shaped glass drill bit at low speed and lots of pressure and that was making good progress until i crushed the tip with too much pressure. I then used a newly sharpened hss bit to contunue and whilst it screached badly and was much slower that got through in the end. |
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