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18th November 2021, 04:20 PM #1Most Valued Member
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- Aug 2015
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? new drill bit won't cut on crossdrilling
I don't understand. I've got a 10mm ms rod that I'm trying to cross-drill with a 2.5mm drill bit. I've got it on a pedestal drill, in v-blocks, brand new cobalt drill bit (coz I had no luck with the previous new hss bit, or the previous bit before that), using spray lubricant, going at about 680rpm -- just won't cut. It's got down about 0.5mm, that's all. Why?
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