Old Home Restoration / Renovation
Apr 22, 2018 7:37 pm
Anyone with extensive metal drilling experience that can help me with some questions below? I’m hanging interior barn style doors. I’m trying to drill 10mm holes into galvanised steel with a powerful Bosch drill. I’ve been through 2 normal 10mm metal drill bits. The first managed to do one hole and some of the next but wouldn’t do anymore. I then bought a heavy duty ‘high carbon steel' drill bit (very expensive), and that got almost through the second and a bit of the third, but was struggling so now onto the second heavy duty which is going nowhere.
I did realise at one point today I had the drill on reverse instead (😂😂😡😡). Would reverse wear the bit down?? I have been using a catious speed and olive oil as suggested by the searches I've made. In despair now of this job that's now becoming expensive.
What to do???
Will having the drill in reverse (accidentally) wear down a drill bit?
Do I need to have regular breaks to let the metal cool down?
If so, how long can I drill for and how long should I wait for it to cool?
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