stud extractor

happy days

happy days

Active Member
Needed to remove doorcard to acess lock, the heads on the bolts holding dootr pull were rounded off so driver was useless. ended up cutting the heads off to remove door pull. Now to remove the studs left in. They are rusted in and solid, am thinking osf using a stud extractor, anyone any input if these are any good, which type is best etc cheers Mick
 
I'd drill it with a left handed drill. Stud extractors if they snap leave you in a worse state than when you started from bitter experience.
 
The stud is pretty flush with the door so not much to attach onto to grip. I thought the extractor drills into the stud and then turns the stud to remove, your saying these extractors break. I would imagine these rusted in bolts will be a hard metal. Was thinking of a slightly smaller drill bit and putting a hole through the stud to see if it makes it any looser but still have nothing to grip on the stud.
 
to use the extractor you have to drill through the middle and then screw in the extractor.

If you do use an extractor you need to try and mimic the shape of the extractor by drilling a thin one through the middle, then thicker and thicker ones so as to mimic the taper.

A left handed drill bit means it may unscrew from the drilling action.

Rich
 
Like Rich, I haven't had much luck with screw in stud extractors.

I have one of the laser impact extractors which I have used with some success (especially on small rounded/corroded hex head bolts). There is a link below and I think I have seen them for sale in local Halfords for around £20. I am guessing the screw you have sheared is only about 1/4" diameter? Also, if there is not much left protruding, it might not be possible to use the impact gadget to get a good grip on the stud?

http://www.amazon.co.uk/Laser-3986-...ef=sr_1_9?s=diy&ie=UTF8&qid=1343559378&sr=1-9

What I normally do in a situation like this is use my mini-grinder to grind some flats on the thread. This often allows me to get it off with my vice grips (like the ones below)
41mPkLuBqbL._AA160_.jpg

Make sure it is well soaked in WD40 and heated with blow torch first (making sure not to set car alight). I have found plenty heat always makes a difference when getting seized bolts or screws out.

If this fails, my next step is to grind or file the top of the stud flat. Then carefully centre punch it and drill it out. Starting with a 2 or 3mm drill and progressing up to just smaller than the diameter of the hole. Carefully remove the metal from the start of the thread in the hole and use a tap bit of the correct size to clean out the remains of the stud.
 
Hi, all of the above, but as it is broken off flush dont try and remove it out towards you.
Try and screw through into the door, there is less thread to go through the captive nut.

Colin
 
I assume there is not enough stud left to get a couple of half size nuts into it? You know, so you can lock the nuts together and twist it off using a spanner on the lower one? This has also worked for me in the past.
 
I've got that very set - seemed the most reasonably priced one that had a mixture of metric and imperial threads i could find. Successfully cleaned out a couple of holes but not done any proper tapping.

Rich.
 
Bit late now, but if you hadn't cut the heads off, you might have had some luck with these...
DSC06206.jpg


Bolt extractors, which bite into the rounded head as you undo them..

Bit late now though... :|
 
My top tip is to find a nut slightly bigger than the stud, attach it on the residue of the stud and mid weld it to the stud. Fill the nut with weld. The heat works to loosen the stud and after cooling down you can use a spanner to unscrew it. Has worked very well for me!
Regards, Barten
 
Barten said:
My top tip is to find a nut slightly bigger than the stud, attach it on the residue of the stud and mid weld it to the stud. Fill the nut with weld. The heat works to loosen the stud and after cooling down you can use a spanner to unscrew it. Has worked very well for me!
Click to expand...
Yes, that's my favourite method too.
 
If you grind whats left of a stud flat,punch a dot in centre and drill a hole down it you can then carefully enlarge the hole untill you are left with a very thin section which you can collapse with a pointed punch.
Heat is your best friend when removing seized components also plus gas,diesel or similar (WD40 is pretty hopeless).Putting a release fluid on a hot component will see it drawn in as it cools,repeat the process a few times for best results.
When dealing with rusty nuts and bolts,one thing you can never have to much of is patience.
 
You must log in or register to reply here.
Back
Top