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PostPosted: Fri Sep 28, 2012 10:17 am 
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Joined: Sat May 22, 2010 10:33 pm
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Location: Suffolk
Well it so stuck. So far I have had the RH crank arm resting on a block of wood with bak of the pin sitting over a hole drilled into the wood. The BB sheel sit on another block of wood to keep the bike stable. I have a socket over the RH cotter pin thread and a wide punch going through (to stop it slipping off and damagin myself on the chainring) and I have hit the punch as hard as dare with a hammer several times. It is not budging. Suprisinly the cotter pin has not bent either.

I have got plug gas on it too but that is no help either. I do not have a cotter pin press as I cannot find one for sale.

So any other bright ideas on how to get this thing out.

Silly me I swapped to a lump hammer and hit harder than I dared and it came out slowly.

I hate cotter pins.


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PostPosted: Fri Sep 28, 2012 10:26 am 
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Location: Shrewsbury
I'm amazed the pin hasn't bent, they always do for me. I'd say some heat is the next option, boiling water, or a hot air gun?

I don't want to worry you, but I've always found them little gits to get back in as well. Without a press they always seem to work loose.

Carry on bangin :)

edit: Just realised you've done it doh!!


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PostPosted: Fri Sep 28, 2012 10:36 am 
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It is possible to hamer then into place with a punh with the rank arm on a block of wood and the thread of the pin resting in hole drilled in the wood. Then you can wack away knowing the BB axle is supported.

A press is better easier, shame no one sell them.

Also why the cotters come out cotterless BB's go in. I like retro/vintage bikes but that is one part of vintage tech I am happy to consign to the dustbin of history.


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PostPosted: Fri Sep 28, 2012 1:00 pm 
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bm0p700f wrote:
consign to the dustbin of history.


+1 :)


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PostPosted: Fri Sep 28, 2012 1:19 pm 
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Joined: Mon Sep 17, 2012 4:25 pm
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Location: hertford
I had a similar problem recently. I found that if I drilled a hole through the pin (right through to the other side) and used a hammer and punch to push the outside of cotter pin which is now a tube towards the center thus collapsing it that eventually got it out. If you would like me to explain in greater detail just pm me.

Dont worry there is always a way to get it out


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PostPosted: Fri Sep 28, 2012 3:07 pm 
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Joined: Sat May 22, 2010 10:33 pm
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It came out I just had to break out the lump hammer (which is where the socket and punch come in handy to prevent damage to anything). It still did not bend either.

It was a super cotter! Now a dead cotter.


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PostPosted: Fri Sep 28, 2012 3:13 pm 
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Location: North Herts
JakeMiddleton wrote:
I had a similar problem recently. I found that if I drilled a hole through the pin (right through to the other side) and used a hammer and punch to push the outside of cotter pin which is now a tube towards the center thus collapsing it that eventually got it out. If you would like me to explain in greater detail just pm me.

Dont worry there is always a way to get it out


Jake
I am in Watton at Stone. May have to come round for a demo.


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PostPosted: Fri Sep 28, 2012 4:47 pm 
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Joined: Mon Sep 17, 2012 4:25 pm
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Location: hertford
Steve

My family lives in hertford but normally I am in bournemouth where I am studying, im there now, otherwise I would be only too glad to help out


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PostPosted: Tue Apr 30, 2013 2:59 pm 
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Joined: Tue Aug 21, 2012 5:45 pm
Posts: 4
A cotterpin press will make removing cotterpins much easier:

http://www.ebay.co.uk/itm/COTTERPIN-PRE ... 460ea20f71


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PostPosted: Tue Apr 30, 2013 6:47 pm 
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Joined: Mon Feb 15, 2010 6:00 pm
Posts: 608
bm0p700f wrote:
...A press is better easier, shame no one sell them.


Realise your done, but figure it's worth putting a note here in case someone is ever looking and the Ebay ones are gone. Bikesmith have been making a very good cotterpin press for quite a while.

I've also found putting in with a press makes removing much easier too. Although I did drive one in too far, not realising how much torque I was getting from the press first time I used it. Seemed amazingly tight. Snapped crank arm two rides later! Oops.


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