Core Drilling Advice

Mr Bump

Mr Bump

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I need to drill a hole in a wall to pass a waste pipe for a sink, its in the little house me and a friend are renovating.
I have a decent SDS drill so just need a recommend for a budget bit , it will be a single use situation i suspect my drill is below
it will be a standard depth external wall

1769863901967.png
 
My only comment would be make sure to buy a bit 'a bit bigger' than the diameter of the waste pipe.
 
I'd add take it easy.
If a core bit 'catches' it can break your wrist, at least that was the case with mains powered, your battery drill may still be powerful enough.
 
stevewestern said:
I'd add take it easy.
If a core bit 'catches' it can break your wrist, at least that was the case with mains powered, your battery drill may still be powerful enough.
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The above 18V Bosch SDS should have a clutch to save your wrist, the similar one I have does.

They are actually very good drills, the one I have replaced a 24V Nicad powered Bosch, it is not quite as aggressive on hammer as the old one but using a core drill you will not be using hammer
 
zx9 said:
The above 18V Bosch SDS should have a clutch to save your wrist, the similar one I have does.

They are actually very good drills, the one I have replaced a 24V Nicad powered Bosch, it is not quite as aggressive on hammer as the old one but using a core drill you will not be using hammer
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id also have one of these i might dig it out for that job
1769950933501.png
 
Mr Bump said:
id also have one of these i might dig it out for that job
View attachment 473957
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stevewestern said:
I'd add take it easy.
If a core bit 'catches' it can break your wrist, at least that was the case with mains powered, your battery drill may still be powerful enough.
Click to expand...

This ^^

You want something that can go slow and easy, not brutal and fast - Percussion Drill is the answer with the right size core bit.

Yes you can do it with a SDS drill but IME you will blunt the bit quite rapidly and it will probably only be useful for the first application, repeat applications will eb a waste of time.
 
Mr Perceptive said:
This ^^

You want something that can go slow and easy, not brutal and fast - Percussion Drill is the answer with the right size core bit.

Yes you can do it with a SDS drill but IME you will blunt the bit quite rapidly and it will probably only be useful for the first application, repeat applications will eb a waste of time.
Click to expand...

oh you only do cores on none hammer even with SDS yep i am on that
 
Mr Bump said:
I need to drill a hole in a wall to pass a waste pipe for a sink, its in the little house me and a friend are renovating.
Click to expand...
What is the nature of the wall? If it's concrete block a cheap core drill bit will work, if it's red engineering brick my experience is that a cheap bit of a size suitable for a sink waste will give up before the brick does and be a false economy.
 
onomatopoeia said:
What is the nature of the wall? If it's concrete block a cheap core drill bit will work, if it's red engineering brick my experience is that a cheap bit of a size suitable for a sink waste will give up before the brick does and be a false economy.
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its a bit of both, old red brick with a stone facing. about 120 years old
 
billy nomates said:
These will do for a one off, you'll need the adapter as well. Go through with a standard masonry drill bit first as your pilot then fit it in the adapter to guide it through.

https://www.toolstation.com/tct-core-drill-bit/p69846
https://www.toolstation.com/tct-core-adaptor/p79567
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quick question @billy nomates I get i will drill the pilot hole with an SDS and then use it in the bit as the guide? SDS masonary? I can't see inside the tube to see the slot type?

EDIT : This?

www.toolstation.com

TCT Core Pilot Drill

For use with hex and SDS drive adaptors and TCT core drills.
www.toolstation.com www.toolstation.com
 
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Mr Perceptive said:
This ^^

You want something that can go slow and easy, not brutal and fast - Percussion Drill is the answer with the right size core bit.

Yes you can do it with a SDS drill but IME you will blunt the bit quite rapidly and it will probably only be useful for the first application, repeat applications will eb a waste of time.
Click to expand...
Take it from someone who used to drill cores in concrete as part of his job, you do not drill cores using a percussion action drill
 
munch said:
Take it from someone who used to drill cores in concrete as part of his job, you do not drill cores using a percussion action drill
Click to expand...

I will not be running my SDS in percussion mode just normal round and round mode :-) i allready know that.
 
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