Drilling through 2ft stone wall

[Gav_P]

So I am trying to drill a couple of holes through the original stone wall (about 2ft thick) in my cottage to get 15mm water pipe through for an outdoor shower. I’m using a hilti with 18” drill bit, so have to drill from each side - hoping my measurements line up!
 

However the guts of the wall are dust, rubble etc and keeps dropping and blocking the hole I have just drilled. ... it’s doing my nut in! 

 

What can I do to keep the drilled hole clear??

Edited December 5, 2020 by Gav_P

[Oz07]

Bigger hole thru stone then some conduit sleeved over a smaller drill for the mid section?

[Russell griffiths]

Move house, it will be easier in the long run. 

 

 

 

 

 

Or go and buy a longer drill bit, drill all the way through and push in a bit of 20mm plastic pipe as you retrieve the drill. Then slide through the copper. 

Edited December 5, 2020 by Russell griffiths

[Oz07]

Good luck meeting up a couple of degrees difference and you're knackered 

[joe90]

IMO you will never do it from both sides, longer drill or in the past I have taken stones out both sides then cemented stones back around a duct/tube.

[Gav_P]

Just now, joe90 said:

IMO you will never do it from both sides, longer drill or in the past I have taken stones out both sides then cemented stones back around a duct/tube.

Yeah, this is what I did for the pipe work for the ASHP... I just didn’t want to go through that again for 2 poxy pipes. ... I was hoping for a cheat
 

I was thinking that I could squirt in a load of expanding foam and then when it’s gone off, drill again. Maybe this would stop all the cack in the middle of the wall from dropping down? 

[Gav_P]

11 minutes ago, Oz07 said:

Good luck meeting up a couple of degrees difference and you're knackered 

I’ve measured a dozen times to get the spot to drill, then I used a 22mm bit, which I thought could hopefully make up for some minor deviation. ... next option is the 30mm bit. 

[PeterW]

3ft long 25mm cheap SDS drill with a piece of conduit over it. 

[Gav_P]

4 minutes ago, PeterW said:

3ft long 25mm cheap SDS drill with a piece of conduit over it. 

Is there such a thing as cheap 3ft bit? I need SDS Max and they seem to be £100for a bit. 

[Russell griffiths]

5 minutes ago, Gav_P said:

About £15 at toolstation 

Edited December 5, 2020 by Russell griffiths

[Gav_P]

Thinking about it, I could probably just get a longer drill bit for my cordless drill with a normal chuck. ... that will be cheap! 

[trialuser]

yes

https://www.amazon.co.uk/Extra-Long-Metre-Long-Masonry-Drill/dp/B01MSFG1Y6/ref=sr_1_6?dchild=1&keywords=3+foot+sds&qid=1607198885&sr=8-6

I too have walls like that.

These are ok for the price, I find it's the splined end which is hammered which gets knackered before the tip.

Perhaps they are no good for sds max?

[Gav_P]

1 minute ago, trialuser said:

yes

https://www.amazon.co.uk/Extra-Long-Metre-Long-Masonry-Drill/dp/B01MSFG1Y6/ref=sr_1_6?dchild=1&keywords=3+foot+sds&qid=1607198885&sr=8-6

I too have walls like that.

These are ok for the price, I find it's the splined end which is hammered which gets knackered before the tip.

Perhaps they are no good for sds max?

Thanks, but SDS Plus and SDS Max are different sizes. 

[Gav_P]

5 minutes ago, Russell griffiths said:

 

I Can’t find any SDS Max of suitable size at screwfix. 

[joe90]

Yes, watch it does not get stuck in the “Chuck” (ask me how I know) I think they are not case hardened properly.

 

 

Edited December 5, 2020 by joe90

[trialuser]

Ah.

A technique I use is to withdraw completely and re enter the hole repeatedly until the cave ins pack tight and stop.

I was reluctant to type that!

[joe90]

Just now, trialuser said:

A technique I use is to withdraw completely and re enter the hole repeatedly until the cave ins pack tight and stop.

and you end up with a cavity wall (after a long time) ?

[Gav_P]

1 minute ago, joe90 said:

and you end up with a cavity wall (after a long time) ?

That’s exactly what’s happening.... time to order some beads! ?

[Gav_P]

4 minutes ago, joe90 said:

Yes, watch it does not get stuck in the “Chuck” (ask me how I know) I think they are not case hardened properly.

 

 

That’s the big difference between SDS plus and SDS Max... Max seems to be indestructible and lasts forever, but also costs the earth! 

[joe90]

1 minute ago, Gav_P said:

time to order some beads!

But you will need to drill more holes to get the beads in ?????

[Gav_P]

Just now, joe90 said:

But you will need to drill more holes to get the beads in ?????

 But only half way! ..  which I can do easily. 

[Onoff]

SDS plus to max adapter:

 

https://www.amazon.co.uk/121009-Chuck-Adaptor-Shank-Makita/dp/B00JRD0CMM/ref=mp_s_a_1_3?

[tonyshouse]

Ideally use a sleeved drill, need ti permanently prevent stuff falling into the drilled hole.

 

the walls of Windsor castle keep are 6m thick, you have it easy ?

[TonyT]

25mm drill bit with a 22 mm copper pipe sleeve and 15mm pipe inserted in sleeve.

 

ends of pipe/sleeve sealed.

 

[ProDave]

As everyone else says, get a set of 1M long SDS bits.  Done it loads of times.  If the wall is rubble in the middle get a sleeve ready and an assistant to push the sleeve in from the other side as you withdraw the drill.  25mm drill and a bit of 22mm copper is a perfect sleeve for 15mm.