SDS Bit Stuck In Concrete

[Migmac]

What about welding a plate on the drill bit and jamming a bottle jack where the drill bit goes into the floor, jack it out.

 

[Onoff]

So the 16mm drill is stuck. I'm trying to go alongside a bit at a time with a 24mm bit again 1m long. About 5" to go before I am at the same depth as the stuck drill but the 24mm doesn't seem to want to go any further. Hit steel maybe?

 

[Onoff]

What about welding a plate on the drill bit and jamming a bottle jack where the drill bit goes into the floor, jack it out.

That's not a bad shout. Pity I've lent my one and only bottle jack out!

 

[Maker]

That's not a bad shout. Pity I've lent my one and only bottle jack out!

Nice excuse to buy a portapower then.

 

[zx9]

Maybe time to come from the other side.

I think so.

 

[Kram]

First rule of hammers, try a bigger hammer. The adjustables wouldnt stay on if I were swinging it.

 

[angellonewolf]

First rule of hammers, try a bigger hammer. The adjustables wouldnt stay on if I were swinging it.

a piece of metal wont stay on if i was welding it

 

[Onoff]

given the amount of time you have used trying to get this out, might it be a good idea to cut it off as low as you can, fill the hole with cement and start a new hole a bit to the right?

No. I'll hit the same issues (steel) and the main reason is I'm so far down with the core cutter I'll have to buy a new one if I start again. Another £30.

At the mo I'm through to "mud" with the 24mm and imo it's pretty darn parallel and close to the the stuck 16mm one. Still though the 16 won't budge.

Can't get purchase down there anywhere to start another 24mm hole at the mo. Just keeps slipping into the one I have drilled through.

Maybe time to come from the other side.

(Thread tidied)

 

[Onoff]

And THEN the end of the 24mm SDS snapped off in the new SDS drill:

At least the drill didn't get stuck!

 

[tom2207]

cant you just cut it off flush with the concrete and use the new hole that youve drilled beside it

 

[Revs1972]

ooof, not seen that happen for a while (sheared off M16 SDS Max using Hilti Cordless SDS MAX that was way too powerful for that size of drill bit )

 

[Onoff]

ooof, not seen that happen for a while (sheared off M16 SDS Max using Hilti Cordless SDS MAX that was way too powerful for that size of drill bit )

Erm...these were from Toolstation I seem to remember. Set of 3.

That's the 16 and 24 knackered now!

 

[Onoff]

cant you just cut it off flush with the concrete and use the new hole that youve drilled beside it

No. I want a 63mm duct through there.

 

[Jay1st]

Drop some HCL in the hole where th bit is to free it ?

 

[tom2207]

No. I want a 63mm duct through there.

ah ,, sorry ,,, have you oxy acet handy , you could bend a 90 on it to get some purchase for twisting or pulling , even a chain block and a simple frame may get you a good pull , and use the long end on the 90 for a wiggle , bung a pipe on it for a bit more leverage if needed

 

[Onoff]

ah ,, sorry ,,, have you oxy acet handy , you could bend a 90 on it to get some purchase for twisting or pulling , even a chain block and a simple frame may get you a good pull , and use the long end on the 90 for a wiggle , bung a pipe on it for a bit more leverage if needed

Pipe / leverage is worth a go. Got some thick wall tube here.

 

[tom2207]

Pipe / leverage is worth a go. Got some thick wall tube here.

put a squirt of washing up liquid down the flutes of the drill and a kettle of boiling water first too, then let it cool and give it a go ,, may as well have everything you can working for you as against you

 

[qwakers]

why dont you get a dremel or similar down there and cut it off flush with the bottom of the hole then just carry on with the core drill. you don't need a pilot when you're that far down.

 

[angellonewolf]

^^^ i think the idea he was seeing where it was going to come out unless hes got a very deep core drill it will get in the way and cutting it of means removing it he will be toast

 

[Onoff]

Tfft!

I wedged a 6' hex breaker bar down alongside the stuck 16mm bit. For a second that was looking a bit stuck too so wrenched it round with the bfo adjustables. Kept beating on the end of the stuck drill and it started to move!

A bit of studding then used to hammer the stuck 1m bit through the footings and presumably into the dirt beyond. Now to get back on the core cutter and see if I can get that stuck!