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pompousporcup...
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Joined: 15 Apr 2015
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PostPosted: 21:15 - 15 Jul 2017    Post subject: woe is me Reply with quote

I have two exhaust studs that are not, i repeat, not! playing ball Sad

Usually i would advise getting the welder out and going to town on it with big nuts and heat but it hasn't worked. No matter what setting i try i cannot get decent enough penetration on the stud itself -_- the nut and weld around it is solid as anything, proper weld, but the weld on the leftover stud just snaps off with any form of torque.
I have cleaned up the stud before welding down to shiny metal but no dice

I have tried drilling one of them but am getting the square root of fking nowhere using a mixture of bits
the latest is something like this:
https://www.screwfix.com/p/erbauer-ground-hss-drill-bit-5mm-pack-of-5/65352

What drill bits work best with hardened steel?

any other ideas either side of using spice..
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ThatDippyTwat
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Joined: 07 Aug 2016
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PostPosted: 22:00 - 15 Jul 2017    Post subject: Reply with quote

Could be shit quality "stainless" stud if it's just shearing off with a MIG weld on the stud/bolt. I've seen it with 'Stainless' 1mm sheet before. Rusted to fuck in 2-3 years.

Might be worth trying a TIG set if you have access to one.
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pompousporcup...
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PostPosted: 22:33 - 15 Jul 2017    Post subject: Reply with quote

I think they were stainless ones yes, it wasn't the original manifold on there and the studs didn't seem like they'd spent 20+ years on the south coast (the bike has)

They are also a pig to drill which I have heard true of stainless studs. Worth noting the other 6 studs came out fine and solid. These two are next to a bit of the head that sticks out so the stud remover socket couldn't sit flush with the head.

I need somewhere that sells cobalt drill bits as far as posts on the forum are concerned right? Can't seem to find any I can buy tomorrow Sad

I don't have access to a tig Sad
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BTTD
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Joined: 22 Nov 2012
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PostPosted: 23:33 - 15 Jul 2017    Post subject: Reply with quote

https://www.toolstation.com/search?searchstr=cobalt

https://www.machinemart.co.uk/c/heller-hss-twist-drill-bits/?type=Cobalt+Twist+Drill
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kramdra
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Joined: 28 Oct 2010
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PostPosted: 23:35 - 15 Jul 2017    Post subject: Reply with quote

OE steel honda studs will snap exactly like that. Consider disolving them with alum.

Toolstation should be open tomorrow, they sell cobalt bits, Heller branded pack of 5 are good.
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pompousporcup...
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PostPosted: 10:37 - 16 Jul 2017    Post subject: Reply with quote

kramdra wrote:
OE steel honda studs will snap exactly like that. Consider disolving them with alum.

Toolstation should be open tomorrow, they sell cobalt bits, Heller branded pack of 5 are good.


turns out there is a toolstation round the corner from me Thumbs Up
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pompousporcup...
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PostPosted: 08:40 - 17 Jul 2017    Post subject: Reply with quote

Its fixed! WIN! Cool

I used some cobalt bits in 3mm, 5mm and 6mm sizes drilling a pilot hole first and then progressing up the bit sizes. It was stressful as there isn't a lot of material behind the stud and going too far would mean drilling into the coolant cavity in the head.

Cobalt bits were great. I also swapped over to using my Bosch cordless which worked a shit load better and easier to use than the mains powered drill i tried first. Seeing coils of swarf coming out is one of the most satisfying things and knowing i had battled for hours and hours to get this fixed made me a happy chappy once it was all done

One of these:
https://www.screwfix.com/p/bosch-gsb-18-2-li-plus-18v-4-0ah-li-ion-cordless-combi-drill/7434k

Picture proof
https://s19.postimg.org/ogdhcljfn/IMAG3918.jpg

https://s19.postimg.org/kmomh6rhf/IMAG3919.jpg

https://s19.postimg.org/qow97ofxf/IMAG3922.jpg

https://s19.postimg.org/53r6k2j6r/IMAG3925.jpg

https://s19.postimg.org/3xn6l9uw3/IMAG3931.jpg
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colink98
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PostPosted: 09:45 - 17 Jul 2017    Post subject: Reply with quote

very rewarding and somewhat of a relief when you get on top of the issue at hand.
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Ayup_Mi-Duck
Renault 5 Driver



Joined: 25 Jan 2017
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PostPosted: 15:20 - 17 Jul 2017    Post subject: Reply with quote

ColinK98 wrote:
very rewarding and somewhat of a relief when you get on top of the issue at hand.


nice work.

This sort of shit always happens to me. "Ill just quickly nip out and sort that thing out."

then 5 hrs later im on the internet buying some random fucking tool that takes 3 days to arrive Sad
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ThatDippyTwat
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PostPosted: 18:59 - 17 Jul 2017    Post subject: Reply with quote

Ayup_Mi-Duck wrote:
This sort of shit always happens to me. "Ill just quickly nip out and sort that thing out."

then 5 days later im on the internet buying some random fucking carb that takes 3 weeks to arrive Sad


Yeah, know that one. Still waiting on a cheap carb to get my by and a rebuild kit for the decent carb to arrive.
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Polarbear
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PostPosted: 22:45 - 17 Jul 2017    Post subject: Reply with quote

Excellent job Thumbs Up
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ferrisio
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PostPosted: 00:38 - 18 Jul 2017    Post subject: Reply with quote

How did you get the crap out once you'd drilled them?
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pompousporcup...
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PostPosted: 08:05 - 18 Jul 2017    Post subject: Reply with quote

ferrisio wrote:
How did you get the crap out once you'd drilled them?


a mixture of wd-40, brake cleaner and an m8 tap Smile once i got the 6mm drill bit all the way in i could brake up the remains of the bolt using the tap.

i ran the tap through the threads 4 or 5 times until i could do it by hand Thumbs Up then did the remaining 7 to get rid of any gunk in the thread.
I do have a little magnet on a stick but i didnt think to use it
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pompousporcup...
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PostPosted: 08:10 - 18 Jul 2017    Post subject: Reply with quote

Ayup_Mi-Duck wrote:
ColinK98 wrote:
very rewarding and somewhat of a relief when you get on top of the issue at hand.


nice work.

This sort of shit always happens to me. "Ill just quickly nip out and sort that thing out."

then 5 hrs later im on the internet buying some random fucking tool that takes 3 days to arrive Sad


you know it. luckily for me i have these things in the tool box from the last time i nipped out in the garage to sort something out Laughing Like the tap and die kit... bought almost 2 years ago to fix some threads and it has just sat in the box until recently to fix this exhaust issue and a zzr1100 sump thread
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