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 Post subject: Extracting studs
PostPosted: Thu Feb 22, 2018 2:28 pm 
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Location: Camden
How difficult should it be to remove the studs from a mini gearbox casing?
They have not sheared - just want to reduce the dimensions of the casing for shipping purposes.
I remember trying to remove some a long time ago and not having any luck.


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 Post subject: Re: Extracting studs
PostPosted: Thu Feb 22, 2018 2:32 pm 
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Location: Holt ACT
Bill B wrote:
How difficult should it be to remove the studs from a mini gearbox casing?
They have not sheared - just want to reduce the dimensions of the casing for shipping purposes.
I remember trying to remove some a long time ago and not having any luck.


This is the foolproof way, Bill.
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71+UXFALT-L._SX355_.jpg


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 Post subject: Re: Extracting studs
PostPosted: Thu Feb 22, 2018 2:41 pm 
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Location: Camden
DavidE wrote:
Bill B wrote:
How difficult should it be to remove the studs from a mini gearbox casing?
They have not sheared - just want to reduce the dimensions of the casing for shipping purposes.
I remember trying to remove some a long time ago and not having any luck.


This is the foolproof way, Bill.
Attachment:
71+UXFALT-L._SX355_.jpg


Thank you, David.
I have a Litchfield version of exactly that.
It is a bit rough on the threads of short, fully threaded studs.
Do you know whether the studs give in easily from any experience?


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 Post subject: Re: Extracting studs
PostPosted: Thu Feb 22, 2018 3:38 pm 
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I have this type, more contact area so less chance of damaging threads... but for the little ones (like heater outlet) I still lock 2 nuts together

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 Post subject: Re: Extracting studs
PostPosted: Thu Feb 22, 2018 4:58 pm 
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Joined: Mon Jan 12, 2015 10:59 pm
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Location: Holt ACT
Bill B wrote:
DavidE wrote:
Bill B wrote:
How difficult should it be to remove the studs from a mini gearbox casing?
They have not sheared - just want to reduce the dimensions of the casing for shipping purposes.
I remember trying to remove some a long time ago and not having any luck.


This is the foolproof way, Bill.
Attachment:
71+UXFALT-L._SX355_.jpg


Thank you, David.
I have a Litchfield version of exactly that.
It is a bit rough on the threads of short, fully threaded studs.
Do you know whether the studs give in easily from any experience?


From my experience, yes, but if you are experiencing stubborn ones, give the stud a squirt of a penetrating spray and let it work in.


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 Post subject: Re: Extracting studs
PostPosted: Fri Feb 23, 2018 8:14 am 
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Joined: Mon Mar 10, 2014 11:38 am
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Location: Tassie
I have a 'Chuck Stud Remover'. Google it. Works really well on head studs etc.

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 Post subject: Re: Extracting studs
PostPosted: Fri Feb 23, 2018 4:24 pm 
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Location: Melbourne
Easiest way is to use 2 nuts on the stud.
Tighten them against each other and try and get the flats to align.
Use a ring spanner on both nuts to unscrew the stud.
If you can't align the flats then use an open ender on the bottom nut to unscrew the stud.
Some WD40 will help if there is any corrosion between the steel stud and the aluminium alloy case.
The knurled wheel type of stud extractor will probably mark the stud and probably should only be used on studs that are going to be thrown away.
Its not a good idea to use them on high stressed studs as the knurl marks can cause stress points and the stud may fail at a most inappropriate time.

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 Post subject: Re: Extracting studs
PostPosted: Fri Feb 23, 2018 8:31 pm 
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Location: Bentleigh, Melbourne
I agree with Miniron,

I'd be astounded if you can't remove the studs using the 2 nut method. They wouldn't have been torqued in much in the first place being steel into Alloy....

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 Post subject: Re: Extracting studs
PostPosted: Fri Feb 23, 2018 9:33 pm 
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If they don't want to move, warm the case up locally with a hot air gun or gas torch. I have had a few that were very tight...

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 Post subject: Re: Extracting studs
PostPosted: Sat Feb 24, 2018 6:33 am 
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If WD40 doesn't do the job, I read once that a 50/50 mix of Automatic Transmission Fluid and Acetone is the best penetrating fluid.

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 Post subject: Re: Extracting studs
PostPosted: Sat Feb 24, 2018 10:59 am 
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Joined: Wed Sep 22, 2004 5:46 pm
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Location: Melbourne
There is also a Wurth product that has a freeze component in with the penetrating agent that cools the stud and shrinks it slightly and as it warms up the penetrating agent is sucked into the thread.
Unfortunately I can't remember the name.
KRAFT disease strikes again!

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 Post subject: Re: Extracting studs
PostPosted: Sat Feb 24, 2018 11:04 am 
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I have found a lubricant product called TMT from a company called Seal-Lock useful to free studs.

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 Post subject: Re: Extracting studs
PostPosted: Sat Feb 24, 2018 3:37 pm 
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Location: Camden
Thanks everyone.
I always worried about the knurled cam-lock tool on a high stress stud like head studs, but the diff casing is low tensile and nicks shouldn't be a problem.


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 Post subject: Re: Extracting studs
PostPosted: Mon Feb 26, 2018 7:21 pm 
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Joined: Sat Aug 27, 2011 9:34 pm
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Location: East Melbourne
miniron wrote:
There is also a Wurth product that has a freeze component in with the penetrating agent that cools the stud and shrinks it slightly and as it warms up the penetrating agent is sucked into the thread.
Unfortunately I can't remember the name.
KRAFT disease strikes again!



Rost-Off Ice


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 Post subject: Re: Extracting studs
PostPosted: Tue Feb 27, 2018 9:01 am 
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Location: Melbourne
That's it.

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