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Extracting studs
https://www.ausmini.com/forums/viewtopic.php?f=2&t=96867		 Page 1 of 1
Author:  Bill B [ Thu Feb 22, 2018 2:28 pm ]
Post subject:  Extracting studs
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.
Author:  DavidE [ Thu Feb 22, 2018 2:32 pm ]
Post subject:  Re: Extracting studs
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
Author:  Bill B [ Thu Feb 22, 2018 2:41 pm ]
Post subject:  Re: Extracting studs
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?
Author:  simon k [ Thu Feb 22, 2018 3:38 pm ]
Post subject:  Re: Extracting studs
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

Image
Author:  DavidE [ Thu Feb 22, 2018 4:58 pm ]
Post subject:  Re: Extracting studs
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.
Author:  Scoop [ Fri Feb 23, 2018 8:14 am ]
Post subject:  Re: Extracting studs
I have a 'Chuck Stud Remover'. Google it. Works really well on head studs etc.
Author:  miniron [ Fri Feb 23, 2018 4:24 pm ]
Post subject:  Re: Extracting studs
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.

RonR

RonR
Author:  deluxe67 [ Fri Feb 23, 2018 8:31 pm ]
Post subject:  Re: Extracting studs
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....
Author:  drmini in aust [ Fri Feb 23, 2018 9:33 pm ]
Post subject:  Re: Extracting studs
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...
Author:  Phil 850 [ Sat Feb 24, 2018 6:33 am ]
Post subject:  Re: Extracting studs
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.
Author:  miniron [ Sat Feb 24, 2018 10:59 am ]
Post subject:  Re: Extracting studs
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!
Author:  cgo [ Sat Feb 24, 2018 11:04 am ]
Post subject:  Re: Extracting studs
I have found a lubricant product called TMT from a company called Seal-Lock useful to free studs.
Author:  Bill B [ Sat Feb 24, 2018 3:37 pm ]
Post subject:  Re: Extracting studs
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.
Author:  JimL [ Mon Feb 26, 2018 7:21 pm ]
Post subject:  Re: Extracting studs
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
Author:  miniron [ Tue Feb 27, 2018 9:01 am ]
Post subject:  Re: Extracting studs
That's it.
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