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Pls. Help me to remove Stubborn Screw...

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Pls. Help me to remove Stubborn Screw...

Postby newcross on Wed May 30, 2007 2:27 pm

Hello everyone, I seek your advice to unscrew one very stubborn screw. The screw is the ine at the joint of toptube and rear tube. As I wrote in the rear brake cable topic http://www.abikecentral.com/forum/viewtopic.php?t=307 , I know how to remove the joint axis and one of the two screw, but it seems the other screw is always glued(?) onto the axis...

My aim here is a little modification for more comfortable pedaling experience. I'm replacing some A-bike screws to more compact buttonhead screws. Then the glued(?) screw becomes trouble here...

I tried many things from a simple double-pliers method to more complicated special wooden clamping method, but everything failed miserably.

Does anyone have any idea to remove this one? Please? :(

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Postby Binch Shin on Wed May 30, 2007 3:19 pm

If I were you, I would use the Acetone(the solvent of the manicure). :D

Anyway, the best choice would be the solvent of the Loctite.
In Korea, there is a suitable product named R2. :wink:

tips : put a solvent inside the tube through its open end by an injector.
notice : I have no experience on this. hehe
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Re: Pls. Help me to remove Stubborn Screw...

Postby editor at large on Wed May 30, 2007 9:20 pm

newcross wrote:My aim here is a little modification for more comfortable pedaling experience. I'm replacing some A-bike screws to more compact buttonhead screws.


Dude, that's a mod too far.

Keep up at this and you'll break your bike and there'll be tears! Let it be, your pedaling experience is ok with these screws :lol:
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Re: Pls. Help me to remove Stubborn Screw...

Postby newcross on Wed May 30, 2007 11:27 pm

Thank you Binch Shin for your tips. I haven't got any luck so far to find any info on the solvent for threadlock in U.K., so I'll get Acetone from nearby pharmacy tomorrow to try. I'll keep posting how it goes here.

editor at large wrote:Keep up at this and you'll break your bike and there'll be tears! Let it be, your pedaling experience is ok with these screws :lol:


Tearing A-bike would be quite a fun! haha :lol:
no, I quite like A-bike just the way it is, and doesn't want to break it, really. Actually this mod has a fair reason.

Recently, I installed clipless pedal (Crank bros. Egg-beater S) to my A-bike. Of course this pedal force my feet to be positioned right in the center of the pedal, and nothing is wrong with that as a binding pedal.

However, with A-bike is a different story. The particular bit, where the screws are, is much wider than conventional bicycle, the screws often catches my trousers when I ride. so I decided to change the screws there to minimise the width and smoothness by using the button head screws instead of the original rather edgy socket head screws. :wink:

The width of the top tube are,

A-bike (incl. screws) : slightly more than 7cm
Conventional MTB (incl. outer cable) : Less than 5cm (depending on models)

There are at least 2cm difference.

It depends on each individual's leg shape whether the A-bike's wide top tube bothers or not, I realise I place my feet on slightly outer on the pedal with normal A-bike pedals and my girlfriend and sister --- they have wider pelvis than mine and somewhat pigeon-toe --- their feet tends to be on the outer half of the pedal. I figured this is a result of us involuntary avoiding the screws scratching our thigh.

All these I first noticed at my weekend trip with them to Loch Ness. Interesting. :)
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Postby newcross on Thu Jun 07, 2007 7:43 pm

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I've been soaking the stiff bit in Acetone for overnight about three times by now, but still haven't managed to unscrew. :cry:

mmm.... I'll keep trying with acetone a bit more.

I also wrote some report on this at A-bike Central Blog.
http://www.abikecentral.com/blog/?p=72
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Postby Binch Shin on Fri Jun 08, 2007 10:49 am

Hmm.. I am feeling impossible now.. :(
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Postby Oleg on Tue Jun 12, 2007 10:12 am

Did you try this way of solution?

http://www.tool-net.co.uk/p-320567/bosc ... t-gun.html

This is the most convenient method to remove screws in folding knife industry.
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Postby newcross on Wed Jun 13, 2007 11:50 am

Thank you Oleg and Binch shin, I don't have a heat gun, but I'll try something similer to burn the glue.
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Postby Binch Shin on Mon Jun 25, 2007 10:29 pm

Hello newcross

Did you succeed in solving the problem ? :roll:
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Postby newcross on Tue Jun 26, 2007 11:10 am

Not yet. :)

I ordered the metal axis part (without screw) to Mayhem UK and waiting for their reply.

After the spare part is secured, I'll try out the heat treatment etc.
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