Screw extractors

[PositronicRay]

Hi I have a couple of sheared off M6 bolts on some bracing behind my grill, the bolts looks pretty rusty.

Are these any good? (combined with a good dose of liquid wrench)

https://www.machinemart.co.uk/shop/product/details...

[andyiley]

I have tried many similar things over the years & the only thing that works reliably is to cut it off, centre pop the middle of the thread, start small & end up with the correct size drill for the tap & re-thread the hole with the correct tap, works 100% every time.

If an eazi out type thing shears, you will never get it out.

[Vipers]

andyiley said:

I have tried many similar things over the years & the only thing that works reliably is to cut it off, centre pop the middle of the thread, start small & end up with the correct size drill for the tap & re-thread the hole with the correct tap, works 100% every time.

If an eazi out type thing shears, you will never get it out.

Reminds me when I tried to by some "easy-outs", "Never heard of them sir, can't help you", as I spotted them I said "That's them there".

He said "Oh you mean screw extractors", he wasn't wrong of course, but amusing at the time.

[steveo3002]

PositronicRay said:

Hi I have a couple of sheared off M6 bolts on some bracing behind my grill, the bolts looks pretty rusty.

Are these any good? (combined with a good dose of liquid wrench)

https://www.machinemart.co.uk/shop/product/details...

i wouldnt trust those cheapie ones , if you have to use such things insist on the best brands like snap on etc , because when the cheap one snaps off you wont be able to easily drill it out

got any mates with a mig welder ? if so tack a washer over the stump and then tack a nut to that and undo it

[PositronicRay]

andyiley said:

I have tried many similar things over the years & the only thing that works reliably is to cut it off, centre pop the middle of the thread, start small & end up with the correct size drill for the tap & re-thread the hole with the correct tap, works 100% every time.

If an eazi out type thing shears, you will never get it out.

Thanks this sounds like the solution. I haven't used a tap and die set since I was an apprentice 35yrs ago.


https://www.machinemart.co.uk/shop/product/details...

A useful thing to have in my tool kit for cleaning threads up I would think.

[littleredrooster]

What people forget when using eazy-out things is that if the bolt was seized/rusted sufficiently to shear off, it is unlikely to budge when something smaller and more brittle is screwed inside the remains.

I've heard many howls of dismay from people when they realise that they now have a broken extractor inside a seized stud!

[Athlon]

andyiley said:

I have tried many similar things over the years & the only thing that works reliably is to cut it off, centre pop the middle of the thread, start small & end up with the correct size drill for the tap & re-thread the hole with the correct tap, works 100% every time.

If an eazi out type thing shears, you will never get it out.

This is the only correct answer you will see on this thread.

[Mr2Mike]

andyiley said:

I have tried many similar things over the years & the only thing that works reliably is to cut it off, centre pop the middle of the thread, start small & end up with the correct size drill for the tap & re-thread the hole with the correct tap, works 100% every time.

If an eazi out type thing shears, you will never get it out.

Screw extractors are only suitable for fasteners that have sheared off due to e.g. excessive load or over tightening. If a fastener has sheared during removal because it's well and truly seized, the smaller diameter screw extractor will suffer the same fate.

The other option that is often successful is to weld a nut over the remains of the bolt. The heat loosens the fastener and the nut gives you something to turn. This does mean you need some of the sheared bolt sticking out and that that part it's screwed into won't be damaged by heat, so it's not always suitable.

[PositronicRay]

PositronicRay said:

andyiley said:

I have tried many similar things over the years & the only thing that works reliably is to cut it off, centre pop the middle of the thread, start small & end up with the correct size drill for the tap & re-thread the hole with the correct tap, works 100% every time.

If an eazi out type thing shears, you will never get it out.

Thanks this sounds like the solution. I haven't used a tap and die set since I was an apprentice 35yrs ago.


https://www.machinemart.co.uk/shop/product/details...

A useful thing to have in my tool kit for cleaning threads up I would think.

Thanks for the tip, this worked perfectly and only took a couple of mins. (mind you Mrs PR is now missing some lard out of the fridge)

[spikeyhead]

A set of lef hand drill bits make drilling out even easier.

[unstable load]

Plus 1 for the left hand drills. As you drill, the piece warms up and the heat, together with the left hand force quite often turns the screw out by itself.

[MattYorke]

I have never ever had an easy out work - and when they shear off, you truly are buggered. If the bolt has sheared off, then sometimes lots of heat and molegrips or a nut welded on top works, but more often than not it's a case of drilling & tapping - which if you're careful you can do without damaging the original thread.

[andyiley]

There's an echo in here....in here....in here....in here