Fixing a Victorian

[torqueless]

Imo that collet locknut ideally needs to have a washer placed underneath it- regardless of whether or not it ameliorates the falling seatpost problem.

 

[Mickeyspinn]

Imo that collet locknut ideally needs to have a washer placed underneath it- regardless of whether or not it ameliorates the falling seatpost problem.

Yes i agree.....and ameliorates...what I wonderful word that's now in my vocabulary

 

[Nabeaquam]

Now didn't that feel far more satisfying and more in tune with how it was originally built rather than caking this stuff all over the place?

View attachment 646501


;-)


So, more than half way around the post means overall the seat post & collet combo were missing roughly 0.06mm in diameter.

It would be worth trying if this holds out - hopefully the post can still be removed if necessary with a bit of grunting. Just how many turns can you get on that lock-nut? It really must have been very precise and finicky.

Hoping this will work out!

The lock nut is bottomed out. I used an 18 inch spanner. I’m hoping the soft aluminum will give the collet and post something to bite into.

 

[Nabeaquam]

Imo that collet locknut ideally needs to have a washer placed underneath it- regardless of whether or not it ameliorates the falling seatpost problem.

Neither of my collet seat post binder bicycles had washers. The nut is very thin with a reduced neck, like a stem bolt, and the threads for the collet are mm. A washer wouldn’t let the nut grab. It’s a little hard to start as original, the thin collet nut just grabs the collet threads. You have to use a spoke head to pull the collet up. It has to stay up around the post so there are enough exposed threads. It’s not hard to do, you just have to make sure the collet isn’t all the way down when you first insert the post and start the nut a half turn before slaming in the post.

 

[torqueless]

Yes i agree.....and ameliorates...what I wonderful word that's now in my vocabulary

Why use a one-syllable word when a five-syllable word will do? That's my philosophy..
Well.. it seems this seat-post securing method might be even more sensitive to seat-post diameter than the method we're all familiar with, with its 0.2mm increments?
One fix that was used on worn crown-race seats was to centre-punch a ring of indentations around it to increase the functional diameter. This works (I guess) because when you create an indentation, some material is inevitably forced outwards, becoming the 'rim of the crater'.. so to speak. Would it be possible to apply this technique to the seat-post?

 

[Mickeyspinn]

Why use a one-syllable word when a five-syllable word will do? That's my philosophy..
Well.. it seems this seat-post securing method might be even more sensitive to seat-post diameter than the method we're all familiar with, with its 0.2mm increments?
One fix that was used on worn crown-race seats was to centre-punch a ring of indentations around it to increase the functional diameter. This works (I guess) because when you create an indentation, some material is inevitably forced outwards, becoming the 'rim of the crater'.. so to speak. Would it be possible to apply this technique to the seat-post?View attachment 646611

Sshhh..that's a long known rarely passed on nugget of knowledge only known to Wizards of bodge!
I "fixed" some knacked spindles on a car once like that....it's still floating around

 

[Nabeaquam]

Why use a one-syllable word when a five-syllable word will do? That's my philosophy..
Well.. it seems this seat-post securing method might be even more sensitive to seat-post diameter than the method we're all familiar with, with its 0.2mm increments?
One fix that was used on worn crown-race seats was to centre-punch a ring of indentations around it to increase the functional diameter. This works (I guess) because when you create an indentation, some material is inevitably forced outwards, becoming the 'rim of the crater'.. so to speak. Would it be possible to apply this technique to the seat-post?View attachment 646611

Nuerlizing

 

[Woz]

Why use a one-syllable word when a five-syllable word will do? That's my philosophy..
Well.. it seems this seat-post securing method might be even more sensitive to seat-post diameter than the method we're all familiar with, with its 0.2mm increments?
One fix that was used on worn crown-race seats was to centre-punch a ring of indentations around it to increase the functional diameter. This works (I guess) because when you create an indentation, some material is inevitably forced outwards, becoming the 'rim of the crater'.. so to speak. Would it be possible to apply this technique to the seat-post?View attachment 646611

Torqueless got his head well screwed on there:

a) It's a solution that involves a hammer.
b) Demands perfect hand to eye co-ordination for the dot punch, so will involve a drink.
c) Requires patience, a bit of trial and error, 100% elegant, 100% in tune with the rest of the bike.
d) Doesn't involve plasticine men.

 

[Mickeyspinn]

Nuerlizing

Just had to Google that...it's a word now as far I'm concerned....definition "good enough perfect"

 

[Nabeaquam]

All that’s left for me to do for the second test beat is to mount the seat and reverse the chain. I’m going wild blueberry picking now so I’m stopping bike work.