1000mm drill bits

Mark_Mark

Dan-Dan wrote: »

Mark , you do always seem to spot the flaws in my plans
Handt even thought of that
Hire + a bit = not expensive , and my uncles a brickie so i guess if i do damage the brick he can fix it for me when he does some pointing i have coming up

Replace a damaged brick and it will need drilling again.

JimmyTheWig

Mark_Mark wrote: »

If he needs a ladder to drill the hole, he'll still need one to put the light up even if he drills from inside.

Yes, but it means he won't have to drill while [STRIKE]falling off[/STRIKE]standing on the ladder.

Nilrem

force_ten wrote: »

we are always told to drill in to out dont know why but that is how i was taught and that is normally the way i drill a wall

It's tidier from memory, if you go from the inside to outside you're pushing much of the dust etc out, and if the brickwork cracks/chips as the bit exits the hole it's on the outside.
It also lets you position it in the room where you want it to enter the room (it doesn't matter so much if it comes out at a slight angle to the outside, but if you're drilling close to an internal wall...).

If you drill inwards you also run a much higher risk of the plasterwork / wallpaper getting damaged around the internal hole, as the drill bit can end up pushing the plaster or wallpaper off the brickwork (especially if the plastering is dodgy, or it's thick wallpaper with weak glue).

force_ten

googler wrote: »

Once drill is through, detach bit from drill, secure cable to drill bit with tape, pull drill bit out, taking cable with it, surely?

sound good in theory but will not always work in practice

the hole will be the exact diameter of the drill bit and if you wrap tape around the drill bit you may struggle to pull the drill bit out

the best tool by far for feeding a wire into a cavity wall is an old wire coat hanger or a length of stiff wire, drill bit out push the coat hanger in and then tape your wire to the coat hanger

force_ten

Mark_Mark wrote: »

If he needs a ladder to drill the hole, he'll still need one to put the light up even if he drills from inside.

the question was asked earlier about drilling out to in how would you drill the hole?

as a 1000 mm drill bit plus the length of the drill and you would need to be about 1.5 meters away from the wall to start with

a ladder stand off is normally around 300 mm and you can get a 600 mm stand off but i have never seen a 1500 mm top end stand off for a ladder

DaftyDuck

I'm betting the drill comes out of the wall with an attached eyeball - from the corpse walled up within. That is one super-impressive-reinforced-double-thick-extra-deep-something-in-there wall.... and all the more reason to get someone in to attack it for you. Who knows, they could drill through a water tank in the airing cupboard at that thickness.


So, Dan-Dan, if you haven't fallen off a ladder attempting this, where are these photos, and can you get the Mrs to measure up for your tool, as I think you're overestimating by at least six inches! She's told me you often exaggerate length

We Demand Evidence And We Demand It Now!!!

vaio

force_ten wrote: »

.......the hole will be the exact diameter of the drill bit and if you wrap tape around the drill bit you may struggle to pull the drill bit out

the best tool by far for feeding a wire into a cavity wall is an old wire coat hanger or a length of stiff wire, drill bit out push the coat hanger in and then tape your wire to the coat hanger

Nah, as post #22 the cutting edge (and hence hole) on tipped masonry bits is bigger than the shank by 2 or 3 mm so you can easily tape something to the shank to act as a draw wire.

Drill hole...remove drill from bit...add tape & draw wire....go inside and pull bit through wall (avoiding the tip which will be hot).....attach cable to draw wire...back outside....pull cable through with draw wire.....fix light & connect...have beer & bask in admiration from OH

Coat hanger would work too but most important, be safe. Handling a metre long bit is ok but only if you are comfortable up a ladder, if you're not then get someone else to do it.

Dan-Dan

Cough 280mm cough

DaftyDuck

Darn it, no eyeballs on the end of the drill bit, and no hidden cache of diamonds.

Can you come here and measure my garden, as I'd love to sell it as three acres?

How did you arrive at the first figure? Elastic tape measure?

(I'd add smileys to the above, but my primitive tablet say no).

Stooby2

I'd go for one of these

http://www.screwfix.com/p/energer-enb465drh-4-8kg-sds-plus-rotary-hammer-drill-230-240v/63303

I've an earlier version of this that's lasted over ten years now for occasional use and is still going strong.

This drill bit

http://www.screwfix.com/p/bosch-sds-plus-drill-bit-b8-16-x-310mm/39936 although you might not need to go as large as 16mm diameter, depending on what cable you use.

All the cables that go through the walls of my house are sealed with mastic, and the ones I've done, I get the nozzle as far in as possible to get a good depth of sealant.