Drilling 15mm hole through catnic / lintel

[Mike1983]

Hi

As per title I need to drill an approx 15mm hole through a catnic / lintel above a double width garage door. The hole is to take a cable from inside to outside the garage.

The lintel is perforated (lots of holes) on the inner side, followed by a cavity, followed by the other side of the lintel, followed by single width brick, then outside.

Would good quality HSS drill bits on a domestic drill eat their way through the lintel or would it not be worth even trying? Also, any other recommendations other than relocating the hole?

Thank you

 

[Mike1983]

Thanks for the replies.

I'm pretty good at general DIY etc and no worries with the brickwork. Never had to drill into metal lintels though other than a pilot hole for a self tapper (blinds) which was a pain. I assumed drilling a larger hole would be a no-go but from the replies I'll go and invest in a decent set of (long) HSS bits, starting small then working up.

Thank you.