Hatton Garden core bits

[the snooper]

shall call HSS and find out the weekend rates on that

that will be 2 huge diamonds hire for the day, what was the delivery address

 

[Shedendman]

that will be 2 huge diamonds hire for the day, what was the delivery address

How much,erm i'll go with BFH and bolster first,try that and get back to ya

 

[the snooper]

How much,erm i'll go with BFH and bolster first,try that and get back to ya

I think you need 7 dwarfs don't you ? I'm sure they dig for diamonds

 

[Shedendman]

 

[Wedg1e]

I've seen cores that sort of size taken out of 6 foot thick concrete, to create holes to bring pipelines out of a culvert, can't recall if it was reinforced as it was cut before we got there.

 

[the snooper]

you can bet a few banks and alike watched the hole in the wall story with a bit more then a passing glance

 

[CompoSimmonite]

Who needs steel reinforcement when you can do the same as the Taiwanese as can be shown in the pictures of the recent building collapse -

That's right - old cooking oil cans !

 

[Wedg1e]

Who needs steel reinforcement when you can do the same as the Taiwanese as can be shown in the pictures of the recent building collapse -

That's right - old cooking oil cans !

Have you seen the dross that the Spaniards put in the walls of their places?! Largely the rubble of whatever they knocked down last week...

 

[the snooper]

W

Who needs steel reinforcement when you can do the same as the Taiwanese as can be shown in the pictures of the recent building collapse -

That's right - old cooking oil cans !

what was the local area known as, tin can alley

 

[gordon stephenson]

Im quite sure that the TV prog said no re-bar in the concrete, I believe the machine itself was a Hilti, Heck of a good recommendation,

 

[hooblah]

One thing that puzzles me is that there were no holes in the wall or floor to bolt the drill down.

 

[taxi ray]

A local company drilled the same holes in reinforced concrete, for an article in the local paper. They said that it took 1.5 hours to drill, and that they used a Hilti.
http://www.nottinghampost.com/Hatto...s-14-million/story-28530670-detail/story.html

 

[RonA]

Now i dont want this to get into the they did right or wrong,whats done is done as far as i'm concerned

One thing that has me bugged is,if that concrete was so called re-enforced ie has some rather large lumps of steel(rebar) in it,what core bit did they use?

Now i've use diamond core bits quite a few times in my life times(both dry and wet,but not as big as that i may add) and from those experiences i know that as soon as you start hitting metal they soon lose cutting ie the edges wear out very fast esp if you go on the thickest of what they drilled,400mm thick wasn't it?

Ok lets say they did it dry as in no coolant whatsoever,aren't we looking at some mother of a core bit being used here,even if wet,so the report says was used,at that thickness and with,if any,steel in the way thats some amount of water used,agreed?

Yet you look at the so called photos after the job, place has no signs of flooding,you dont see any signs of steel in the holes that were cut just clean concrete,ok perhaps there was a big clean up afterwards who knows.
So to sum up is there a diamond core bit thats that good you can hire out of the local HSS (cant remember if it was hired or bought) that'll go through concrete and steel?

When I was still working (at a steelworks) we had a specialist firm come into core drill some reinforced concrete approx 18" thick. They chain drilled the wall to allow the installation of a 36" dia gas main. The gear was water cooled & the rebar in the wall seemed to cause them no problems, the ends were clearly visible in the bored holes.
RonA

 

[Shox Dr]

Taken from taxi rays link

Vinsant said the Hatton Garden vault was made of mass concrete, rather than the re-enforced concrete used to re-create the raid, making it even harder to drill through.'



Why can't anyone get facts right. Mass filled is just that, it can have rebar or not. It has nowt all to do with strength of the mix

.....I was working on the Nth Selby Mine complex in the early 80s, when i first saw a concrete hole saw, it cut through everything with ease, inc rebar.

Move forward 20yrs and a mate, imports massive saws/hole cutters from Sweden, nothing will slow them things down.

As for the monkies that carried out the raid. Did they work for Ealing Studios before, as it reads like the script from a B&W comedy

 

[Pete.]

I do this for a living. Those three holes are about 6 hours work for a competent driller.

Yep, you can easily have a 500 thick wall with no rebar in fact last Saturday I drilled a 150mm diameter 850mm deep in one such wall only took an hour or so. That wall in the pic is very old concrete and construction methods, the aggregate content is very low density and little or no rebar (which again is common for the tpye and location). Piece of cake to put a 250 hole through it and I could show you enough of the basics in 20 minutes that you could do it yourself. Stuff is easy to hire and the bits are standard off the shelf items. They did use water (because you have to) but not enough of it if bit life would be a consideration (which of course it wasn't for them).

 

[ukracer]

I do this for a living. Those three holes are about 6 hours work for a competent driller.

Yep, you can easily have a 500 thick wall with no rebar in fact last Saturday I drilled a 150mm diameter 850mm deep in one such wall only took an hour or so. That wall in the pic is very old concrete and construction methods, the aggregate content is very low density and little or no rebar (which again is common for the tpye and location). Piece of cake to put a 250 hole through it and I could show you enough of the basics in 20 minutes that you could do it yourself. Stuff is easy to hire and the bits are standard off the shelf items. They did use water (because you have to) but not enough of it if bit life would be a consideration (which of course it wasn't for them).

Bazil? ????

 

[Pete.]

Bazil? ????

Not me - I don't get involved with those piddling low-value jobs nowadays

 

[awemawson]

... is that 'Pete the Peterman' talking BOOM

 

[Pete.]

... is that 'Pete the Peterman' talking BOOM

Very good

 

[1192simon]

Now i dont want this to get into the they did right or wrong,whats done is done as far as i'm concerned

One thing that has me bugged is,if that concrete was so called re-enforced ie has some rather large lumps of steel(rebar) in it,what core bit did they use?

Now i've use diamond core bits quite a few times in my life times(both dry and wet,but not as big as that i may add) and from those experiences i know that as soon as you start hitting metal they soon lose cutting ie the edges wear out very fast esp if you go on the thickest of what they drilled,400mm thick wasn't it?

Ok lets say they did it dry as in no coolant whatsoever,aren't we looking at some mother of a core bit being used here,even if wet,so the report says was used,at that thickness and with,if any,steel in the way thats some amount of water used,agreed?

Yet you look at the so called photos after the job, place has no signs of flooding,you dont see any signs of steel in the holes that were cut just clean concrete,ok perhaps there was a big clean up afterwards who knows.
So to sum up is there a diamond core bit thats that good you can hire out of the local HSS (cant remember if it was hired or bought) that'll go through concrete and steel?

I like your style of thinking Ha Ha .. But , the bigger the core bit, it will go through quicker. If you have a 22mm and a 440mm . What has most teeth ? More teeth mean a quicker cut in my opinion. As for no water on floor, Maybe they used some sort of collection/filter system that Hilti has? You would need hundreds of gallons otherwise i reckon. Great post mate...