'94 explosif

[wadsy]

My concern is how far the seatpost has gone down and if it's damaged the seattube further down than just 'splaying' out the top. Hmmmm, any thoughts as I am thinking of bidding as I really fancy a 94-96 explosif as a project.

Cheers

 

[W W Biffta]

ah i see, the post is one of those with a removable seat clamp. in whch case its likely there is alot of it in there. and whats teh deal with that post binder? seriously, with all the parts, its possible you could turn a profit and keep the frame, but wouldnt bank on that fame being still usable.

 

[wadsy]

ah i see, the post is one of those with a removable seat clamp. in whch case its likely there is alot of it in there. and whats teh deal with that post binder? seriously, with all the parts, its possible you could turn a profit and keep the frame, but wouldnt bank on that fame being still usable.

Probably worth waiting for something tidier then?

 

[Anthony]

The pictures aren't very good, but it looks like that could be the old-fashioned kind of post with a removeable clamp for mounting the saddle. If so, that's partly good news, partly bad. Good in the sense that I thought the clamp had been broken off in an attempt to get the post out, but that isn't necessarily the case, so it isn't necessarily that badly stuck. But bad in the sense that I believe almost all of them were steel.

I don't believe this line that the post is actually bigger than the tube and has been hammered in there. I don't think that's possible. But if it's a steel post, there could be a steel:steel rusted-in issue (albeit note that it's painted). If it is steel, melting it out is impossible and cutting it out will be much harder work than soft aluminium. The drill a hole and use a lever method may be the only feasible way, but at least steel shouldn't break the way Jerky said.

I reckon if it sells for around £150 and you haven't got too far to travel, you've got the frame for nothing anyway. And you won't find many of them come up on eBay. Maybe one or two a year.

 

[Geoff]

I dunno- I know what you're saying Anthony, it might be worthwhile at that price for some of the bits, but the top of that seat tube doesn't look too clever.

Where do people get off messing up expensive stuff like that? :roll:

 

[CTK]

It all depends on how far the seatpost goes down into the frame...

 

[ruger44]

You cannot melt the aluminium without destroying the steel...

The steel will warp and/or becomes brittle at the temperatures involved in melting alloys.

EDM, 'Electronic Discharge Machining' is better, but an expensive option
that uses a spark to burn/cut the metal away and can be controlled very well, don't know at what price though...

Have years of experience in motorcycles, and think:
The hacksawblade could be the best option?

 

[JeRkY]

Well I am out on this one due to the experience with the Orange I am currently trying to remove a stuck post from. 24 hours of cycling through fresh mixes of amonia have failed to make it any easier to shift.

Agreed on the temperatures required to melt out the post being too high and structural damage may occur to the steel.

 

[Anthony]

I thought when people talked about melting, they meant using ammonia/equivalent to melt the corrosion between an aluminium post and a steel frame, because the ammonia won't damage the steel.

I don't think it means using heat. As Sheldon Brown points out, aluminium expands more than steel with heat, so heating a steel seat tube just makes the post all the more firmly stuck. On the contrary he recommends freezing the post with a CO2 cannister as aluminium also shrinks more than steel.

 

[greenstiles]

Looks like an alu post to me, yup you can get them,................looks like the right size drill in a machine shop would be the answer............tried many stuck posts though work........take it to a machine shop ! hours of chiseling out tiny chunks of alu......is no fun