How do I remove 7mm snapped off stud ?

[Pilatus]

Any suggestions how I remove the about 7 or 8mm diameter stud shown in the pics attached.Have any of you had success removeing studs with "Left Handed" drill bits,as shown in You Tube Videos.

 

[phillipe]

View attachment 492782 View attachment 492784 View attachment 492786 View attachment 492786 View attachment 492782 View attachment 492784 Any suggestions how I remove the about 7 or 8mm diameter stud shown in the pics attached.Have any of you had success removeing studs with "Left Handed" drill bits,as shown in You Tube Videos.

just done one on a jack hammer,my mechanic friend has a snap on kit,different size bits with guides to keep drill staight,you start with a small drill bit and go as big as you can go without damaging thread,then hammer the correct hex shaped bar .drop a nut onto bar and hopefully undo nut,once i could get at it ,it took 20 mins,i will see if i can find a picy of the kit

 

[Mur Huwcun]

Either drill the centre out and use an extractor or carefully weld it up tack at a time intill you have enough proud to weld a nut or bolt onto it

 

[phillipe]

it was like this

this is a sealey stud extractor kit

 

[multi power]

Either weld something onto it or drill it out

 

[holwellcourtfarm]

First I'd try tapping it round gently with a small chisel. Often the thread is quite loose once they have broken.

If not then +1 for gently add weld until you can get vice grips on it.

 

[TripleSix]

If it's broken off flush or nearly flush i tend to cut a slot across the top with a slitting disc in the grinder, then unscrew the stud with a flat bladed screwdriver.

 

[Dukes Fit]

@MX7 With sheared studs always go for a weld before drilling, the heat helps just as much as anything plus it always makes taking studs out much harder when somebody has tried drilling them out first.

If you can then get some thin walled pipe or at worst a rubber/plastic tube in to the hole, that'll protect the threads and also keep your rod centred.

Build it up bit by bit until you can get a nut on to it then fill the nut and get some decent heat in to it. If you're being extra careful put a washer under the nut before welding.

It should come straight out.

 

[REStracTORATION]

Drill a hole and bray a torx bit in

 

[joe soapy]

Looks the perfect place to use a mag drill

 

[moorender]

+1 for Torx bit.

 

[ACEngineering]

View attachment 492782 View attachment 492784 View attachment 492786 View attachment 492786 View attachment 492782 View attachment 492784 Any suggestions how I remove the about 7 or 8mm diameter stud shown in the pics attached.Have any of you had success removeing studs with "Left Handed" drill bits,as shown in You Tube Videos.

What no ones said is most cap screws like that are 12.9 grade standard bolt is 8.8.
Cobolt drill bits will drill it fine. If you got hss bits then you will need a very good brand no cheap ones would last long.

 

[Mursal]

Torx bit or allen key, but as already mentioned the threads should be loose when the head falls off, well in theory anyway.

 

[multi power]

Torx bit or allen key, but as already mentioned the threads should be loose when the head falls off, well in theory anyway.

Or seized solid

 

[suffolksmallholder]

Remember if you do decide to drill, a sharp centre punch & accurate dot right in the midle of said stud will help.
SS

 

[Mursal]

The old centre punch trick ............

I can remember when all holes were centre punched .....

 

[Pilatus]

What no ones said is most cap screws like that are 12.9 grade standard bolt is 8.8.
Cobolt drill bits will drill it fine. If you got hss bits then you will need a very good brand no cheap ones would last long.

Many thanks for mentioning the 12.9 grade,which it is ,sorry I forgot to mention that ,as very important.
From what I can see on the internet it is a "Ground Shoulder Screw",I have had a job to find a supplier, "Elesa" is the best so far.

 

[Robt]

Snap on left thread drill bit

 

[Hilly]

Looks nice n new, soak wd40 left hand drill bit, if its your day it will come out.

 

[ACEngineering]

Many thanks for mentioning the 12.9 grade,which it is ,sorry I forgot to mention that ,as very important.
From what I can see on the internet it is a "Ground Shoulder Screw",I have had a job to find a supplier, "Elesa" is the best so far.

They are called cap screws and readily available from most nut and bolt places. Your local sparex dealer will be able to order them.