I'm trying to drill a 6mm hole in some remarkably hard limestone.
It seems that normal carbide tipped masonry bits will drill perhaps 5mm or so before getting noticeably blunt and slow. Given that these only cost about £2 each, I can live with that, but just wondering what the "Rolls Royce" of masonry drill bits might be?
I've also tried a diamond-encrusted hole saw thing, but that didn't really work well for me.
I don't have an SDS drill, but suspect that the "Pro" nature of such things might make them a good option. Although for a 6mm hole it does seem overkill!
What kind of rotational speed would the panel recommend for this kind of application?
Thanks!
It seems that normal carbide tipped masonry bits will drill perhaps 5mm or so before getting noticeably blunt and slow. Given that these only cost about £2 each, I can live with that, but just wondering what the "Rolls Royce" of masonry drill bits might be?
I've also tried a diamond-encrusted hole saw thing, but that didn't really work well for me.
I don't have an SDS drill, but suspect that the "Pro" nature of such things might make them a good option. Although for a 6mm hole it does seem overkill!
What kind of rotational speed would the panel recommend for this kind of application?
Thanks!