Anyone know about drills?

[bobbarley]

I need to drill a large hole into my kitchen wall to fit an outside garden tap.

I bought an 18mm x 400mm drill bit to do the job, naively thinking that I could just pop it into my B&Q value drill and away I went.

http://www.ebay.co.uk/itm/250900059413?var=550048523361&ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

When the drill bit arrived however the damn thing wouldn't fit inside my drill, the chuck isn't big enough to take the size of the drill bit.  I expected the drill bit to be smaller at the end to fit inside any old drill, but no.  I guess a normal drill wouldn't be up to the task anyway?

Having done some research it looks like I probably need some sort of SDS rotary hammer drill.  Does that sound right?  If so, will that fit a drill bit with an 18mm diameter?

This seemed like a good choice - http://www.diy.com/nav/fix/power-tools/drills/sds_drills/Bosch-PBH-2100-RE-SDS-Rotary-Hammer-12317531

[JC]

if in doubt get an expert out 

[gazareth]

is that the drill bits with the 2 oval grooves at the end?

[bobbarley]

It's only a hole, can't be that hard.  I also need something with more grunt for making a trench in my conctre lounge floor soon to run cables across the room.

[bobbarley]

is that the drill bits with the 2 oval grooves at the end?

I think SDS drill bits are yes, the bit I bought doesn't have them though.

I'm happy to bin the drill bit I bought though in favour of a proper SDS one.

[DubFan]

Or go to HSS Hireshop and rent one for a day.
Drilling through brick will generally need a mains powered drill, hammer action might be necessary if it's a really thick dense wall.

[bobbarley]

Well I'm going to drill through the cement instead of the brick, so should make it easier.  But I agree I think I need mains powered hammer action.  SDS seems to be required in order to fit large drill bits?

I did think to pop to HSS.  But seeing as I need to do extensive drilling/chiselling into my cement floor soon, it might be better to just invest in somehing.

[justalex81]

steer clear of hitachi sds drills. they're crap.

stick to makita or bosch for an sds drill. if you're going to be doing lots of chiselling then make sure you get a high powered one.

[tweed]

I drill all the time. Have 3 SDS drills. 

The SDS is all the same size even if you got a 6mm or 30mm.

Look up HSS hire. You will have one close by mate.

[bobbarley]

Cheers tweed, it sounds like the option to go for then.  And from what I've read, you use an adaptor to fit normal size bits into one of them?

I think it's worth investing in something.  The drill I have now is some 8 year old B&Q value cordless effort, battery is dead after 10 minutes generally.