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Extra long metal drill bit
Posted: Sun Sep 20, 2015 1:50 pm
by jimbo
I'm trying to bore a hole through from my garage to the outside, above my up and over garage door for the purposes of running cable through it. I appear to have hit what I think is metal, both from the inside (after plasterboard and wood) and from the outside (after facing bricks). I can only presume that this is part of the framework for the garage door but I'm a good 6 inches higher so surprised by that. Either way, I don't have a drill bit for metal nearly long enough to go through it. Does anyone here by any chance? Circa 300mm x 12mm
Cheers
Re: Extra long metal drill bit
Posted: Sun Sep 20, 2015 2:58 pm
by Dave
I presume your using a masonry drill, if you have the ability to sharpen it you should be able to drill through the metal frame, just don’t try and drill it at full speed.
Re: Extra long metal drill bit
Posted: Sun Sep 20, 2015 3:57 pm
by thinfourth
If no luck then i can TIG a drill onto a piece of hydraulic pipe
Re: Extra long metal drill bit
Posted: Sun Sep 20, 2015 6:16 pm
by Ferg
How about moving the hole a little left or right? Just enough to avoid the beam and mastic up the old hole.
Re: Extra long metal drill bit
Posted: Sun Sep 20, 2015 7:17 pm
by BiggestNizzy
Yes but its carbide and worth about £500.
Re: Extra long metal drill bit
Posted: Sun Sep 20, 2015 7:37 pm
by jimbo
Can't move the hole as it's pretty much in the perfect spot, at least as far as neatness goes, but if it comes to it...
Sharpening is a decent shout, I'll give that a go first, but failing that the offer of welding onto a bit of thin pipe is spot on
Thanks guys
Re: Extra long metal drill bit
Posted: Sun Sep 20, 2015 11:13 pm
by Mikie711
By the sound of things your trying to drill through the Catnic Lintel above your door. That will likely take some doing as there will be 2 layers of steel plate about 4mm each thick.
Re: Extra long metal drill bit
Posted: Mon Sep 21, 2015 12:31 am
by rossybee
Mikie711 wrote:By the sound of things your trying to drill through the Catnic Lintel above your door. That will likely take some doing as there will be 2 layers of steel plate about 4mm each thick.
Move holes

Re: Extra long metal drill bit
Posted: Mon Sep 21, 2015 8:33 am
by tut
Best advice yet Ross, that is what I did in the bathroom, but the missus was not convinced.
tut
Re: Extra long metal drill bit
Posted: Mon Sep 21, 2015 12:35 pm
by Dominic
tut wrote:Best advice yet Ross, that is what I did in the bathroom, but the missus was not convinced.
tut

Re: Extra long metal drill bit
Posted: Tue Sep 22, 2015 8:04 am
by jimbo
Mikie711 wrote:By the sound of things your trying to drill through the Catnic Lintel above your door. That will likely take some doing as there will be 2 layers of steel plate about 4mm each thick.
Sorry for the late reply was away the last couple of days. Interesting, that's what a friend suggested it might be. Thanks for the advice, I'll look into options for moving it, just have to try and hide the cable runs I guess.
Cheers
Re: Extra long metal drill bit
Posted: Tue Sep 22, 2015 6:08 pm
by thinfourth
Looking online a catnip lintel is steel | insulation | steel
It should be a piece of piss to get through
Bring me 1 x12mm drill of decent quality and I shall weld it to a lump of bar or pipe
Or if you want to go bigger i have an old mill welded to a piece of pipe already, but being a flat grind it might go anywhere and it is roughly 16mm OD
Re: Extra long metal drill bit
Posted: Tue Sep 22, 2015 7:53 pm
by Mikie711
If it's in his garage it won't have the insulation infill. It will probably be the one that looks like an upside down T.
Re: Extra long metal drill bit
Posted: Wed Sep 23, 2015 10:57 pm
by Callummarshall
I think I have something which may fit the bill at work which could be procured if needs be, what sort of shank does your drill take?
Also, we have a drill sharpener/decent grinding wheel so could possibly re grind your existing drill.
Re: Extra long metal drill bit
Posted: Fri Sep 25, 2015 9:36 am
by jimbo
I have a straight shank drill and an sds one too mate