SDS Drill Bit

[waddycall]

I think I’d be tempted to smack one big hole through, put some sleeves over the pipes and make good.

 

[Easywelder]

From my experience of thin walls with loose rubble, that its going to jam a thousand times. Good luck.

Dead right took me a whole day and a lot of cussing for my Rayburn water pipes through some very thick walls guessing the angle to come out in the right place in old boiler house.

 

[reb78]

Thing is, i have the main holes i just need to widen them. It has taken all day to get those two in the right place.

 

[Pete.]

We drilled a hole through the wall in St Pauls Cathedral year before last, they are stone either side with rubble filling. The rubble has settled over the years so there's extra pressure at the bottom and gaps at the top. Back in the 1930's they did a lot of remedial work installing tie rods and consolidating the loose fill to stop the walls spreading apart at the bottom.

 

[reb78]

I think I’d be tempted to smack one big hole through, put some sleeves over the pipes and make good.

I started to try that but it wasnt happening!!

 

[8ob]

Rotary Kango type drills can be had in those sizes, the one I have takes drills and core drills, extensions are like a mt so you can keep adding extensions. My only concern would be the snatching, it would have been easier to have gone through in one with the correct size bit. Should be able to get one from a hire shop.

Bob

 

[reb78]

Rotary Kango type drills can be had in those sizes, the one I have takes drills and core drills, extensions are like a mt so you can keep adding extensions. My only concern would be the snatching, it would have been easier to have gone through in one with the correct size bit. Should be able to get one from a hire shop.

Bob

Trouble is I only had a vague idea where i was coming out. We had to drill a pilot of sorts to figure that out. As you can see i had seven goes!

Thats why i reckon its now most simple to run through slowly with a larger sds.

 

[sako243]

Well searching 30mm SDS bit has thrown up a load of places selling 550mm for not £20-30.

This place has some 30x800mm bits for £35.63, could drill from both sides since you've got a pilot hole now. Toolstation has some 550mm bits for £16 so I'd be half tempted to weld an extension onto one for the price of that.

 

[Pete.]

Going from 18mm to 32mm will be OK unless the material is very soft. We regularly pre-drill concrete with 16mm to follow with 32mm. It's a lot quicker

 

[Gareth J]

I've some core stuff + extensions here if you like to borrow. Have had to do similar through giant walls. Can be issues with fragments of stones falling behind the core. Will have to check there's a ~32mm bit intact but won't be zillions to get one if required. Needs a clutched drill to use really although smaller ones might be just be ok.

 

[reb78]

I've some core stuff + extensions here if you like to borrow. Have had to do similar through giant walls. Can be issues with fragments of stones falling behind the core. Will have to check there's a ~32mm bit intact but won't be zillions to get one if required. Needs a clutched drill to use really although smaller ones might be just be ok.

Thanks Gareth. Thats very kind. I Just wasnt sure i could maintain the course I need with the core drills.

I ran a 32mm x 1000mm bit through today so the hole will take the pipes now.