Best drill for core work?

[kgreen84]

Am ripping out my bathroom which is poorly designed - bath and basin wastes terminate out of the wall at the same point so the bath one actually has a rise in it!!

I am looking to drill directly out for the bath waste and then drop it onto a new soil stack. I've only got a cheap drill and wondered what the best drill would be? I've seen some at £160 then others at £300+.

I would obviously need core bits too, can you get circular ones that just go straight through and do you need separate ones for the bosses on the stack.

 

[Chukka63]

if youre only using them once,you may wanna consider hiring them.

 

[seco services]

for core drilling the wall maybe better for you to hire one for aday.
cheaper in the long run if your not going to use core drills often.

i use a makita and make sure it has a clutch if you like your wrists.

 

[powell30]

I have a makita as well , I have used both the core drill and my sds to core but the clutched one is much better. These are proffessional tools but a bit overkill for your requirements

As said unless you have money to burn hire one

 

[kgreen84]

if i was to hire one, could i then use this to cut the soil stack or would I just use a combi drill for this?

 

[Jimbo1978]

Make sure if you go down the hire route that they give you a decent core bit. The diamond tips should be wider than the core tube by around 2mm otherwise it will keep jamming in the wall and letting the clutch slip on the drill. After many years of using crappy cores you can really see the difference when you use something decent like a marcrist core.
On the same note never use a drill without a clutch. I saw evidence from a court case where a guy took a hire company to court after breaking his wrist when the core stuck. He said the drill was faulty. turned out he used the wrong machine. they had hired him a brand new makita core drill and a battery drill/driver and he used this instead....silly boy....

Cheers

Jim
almost forgot. if you take your time and are very careful it will cut the soil stack but bear in mind the hire company charges by the 0.5mm on core wear and a old stack will wear it quick

 

[Chukka63]

some companys have stopped hiring out the actual core drill bits due to mismanagement.people using drills on hammer etc.

drill very smoothly and dont force it or it will jam up.

 

[dextrous]

To be honest, for the sake of a single hole, I'd be inclined to go for the good old fashioned cold chisel and hammer. It'll take you less than an hour, and a bit of mortar will go a long way to make good afterwards.

What sort of stack are you bossing into - plastic or iron?

 

[holty]

think dextrous is on the same wave length.basically stitch drill the hole. not pretty end results as to core yet personally find it faster and more economical on bits.oh by the way, stitch drill is a series of holes by, say 6-10mm drill bit round the diameter or the whole needed.then knock out with an sds chisel bit.

 

[dextrous]

think dextrous is on the same wave length.basically stitch drill the hole. not pretty end results as to core yet personally find it faster and more economical on bits.oh by the way, stitch drill is a series of holes by, say 6-10mm drill bit round the diameter or the whole needed.then knock out with an sds chisel bit.

Was with you all the way until you mentioned the SDS. Back to the hire shop it is then

 

[holty]

ok dextrous.if it makes you feel better, hammer and chisel it is

 

[kevplumb]

sds bunch of wimps

 

[dextrous]

ok dextrous.if it makes you feel better, hammer and chisel it is

I can sleep easy now

 

[Chukka63]

yuck at stitch drilling and hammer and chisel.

 

[kgreen84]

can think of the mess now with the hammer and chisel! The soil stack will be a new plastic one btw