Alloy seatpost stuck in cromoly frame

[stedlocks]

I used the above methods on mine last night....upside down with wd up the bottle holes overnight... Took the saddle off and left the top cradle bit on and give it one twat down, and several twats to the side and it came loose.... Keep trying :0)

 

[Pip]

A good machinist should be able to get it out in a few hours. Seatpost will be gone though. Took my dad about 2 hours to get my mates out. He had the tools and know-how though.

Pip

 

[mikee]

a good machinist will charge £60 an hour

its panda yer dealing with

try that plumbers pipe freeze stuff in the alloy post ,had it work before

 

[drcarlos]

FInd someone with a big bench vice, invert frame and plusgas it then put seat post head in vice and twist frame. The seat post stuck in the Montage frame cracked free straight away using this method.

Carl.

 

[stigofthedump43]

Alloy sticks into steel due to galvanic corrosion, a small electric current is set up across dissimilar metals resulting in one of thembeing plated onto the other, sticking them together very effectively. This is why you need to grease seatposts and headset quills and check them regularly.

 

[Mr Panda]

Bike inverted and half a litre of plusgas in there since Sunday afternoon - roll on the weekend :twisted:

Old quill stem waiting in wings beside big hammer.

Plan is to insert quill stem very tightly into seatpost (remember the seat attachment part has, well, become un-attached :twisted: ), place stem at 90 degrees to top tube and tap very gently until post moves

If at first you don't succeed..........

 

[Tazio]

If you have access to a pillar drill couldn't you drill a 10mm hole through the post, shove a length of M10 studding though it and tighten a couple of nuts behind large washers and spring washers (or nylock nuts but they're a pain) and twist away until either you get bored or it comes loose?

You must be bloody keen on this frame to put so much effort and time in.

EDIT

Just realised this is the 2nd time I have posted this. I seem pretty keen on this idea

 

[Mr Panda]

You must be bloody keen on this frame to put so much effort and time in.

Actually its a pretty ordinary Gary Fisher with no unique features - but apart from the seatpost issue the bike's in really good condition, and used regularly by one of the kids.

This isn't a money making venture - just determined to save the bike.

Why? Can't explain, but I have a hatred for wasted food as well if that helps. Legacy of parents' wartime service experiences, rationing, recent mass-overproduction, built in obsolescence, that sort of thing. Grrrrr.

 

[Crantinope]

Not hijacking, I promise, but I'd rather have your problem than mine.

I have about 4 1/2 inches of tube stuck in my PACE RC200 frame, but it starts from about 4 inches down, (there is about 5 inches of it) and finishes about 9 inches in. I dare not do anything. I suppose it will have to be the hacksaw blade option for me, but I don't fancy it at all :cry:
Problem is, I need more seatpost in the frame than it allows :cry:

 

[legrandefromage]

if seatpost diameter is big enough:

http://www.retrobike.co.uk/forum/viewto ... t=seatpost