Seized seat post and stem

[CREPELLO]

The removal tool on the cassette keeps slipping usually I use an MTB skewer as they are longer to secure it to the cassette but as this bike is an MTB the skewer is to short. I think I need to get a shallower tool? Or a longer tandem rear skewer?

I reckon your cassette tool might look something like this...

Whereas you would find something like this won't slip...


Re - the ammonia down seat tube. If it was me I think I would wrap self amalgamating rubber tape around the top of the seat tube and post. The post may be seized, but the ammonia may still find a way through the corrosion and out of the frame - which is what you want, but not for it to leak everywhere before it has done it's job.

Edit: I see Brucey has suggested another idea - cheaper, if you can find the studding. You'd probably also need large M5 penny washers to make it work (or possibly not )

[Brucey]

I could be wrong, but I think screwfix won't have M8x 1 bolts. M5 studding, yes, but not the fine M8.

cheers

[garygkn]

My removal tool is deeper than both shown.

Brucey - I think you could be right re Screwfix I might have better luck at B&Q?

[Brucey]

B&Q? Worth a try, but don't hold your breath. IIRC someone reported finding such a bolt in a bargain bin at a B&Q. The last time I went into B&Q and bought some fasteners I was amazed at the prices they charge; some things were of the order of x100 more expensive than the same thing elsewhere.

cheers

[fastpedaller]

Although one poster said he obtained m8x 1 (i.e. fine) thread bolt in B&Q, this was probably an unusual one-off (maybe for a special application B&Q didn't recognise as he found it in the clearance bin?) - I've only ever found regular m8 x 1.25 at anywhere other than a specialist outlet.

[garygkn]

Thanks for that I'll avoid bothering with the local suppliers and seek out a specialist.

[fastpedaller]

Ah Brucey beat me to it! - another thing worth noting is that B&Q and Screwfix are part of the same group (Kingfisher), although some lines in Screwfix aren't sold in B&Q (and vice versa). Usually an identical item is lower price in Screwfix than B&Q.

[garygkn]

Good to know.
Every day on here is like a school day.
Bicycles have infinite sub genres it's amazing how immersive the subject is. I suppose as time goes by the subject just keeps growing.

[CREPELLO]

My removal tool is deeper than both shown.

Ok, but the tool with the pin doesn't need to be particularly deep because the pin stops the main tool from sliding off. That's my experience.

[garygkn]

I see what you mean - I don't have that pin but the M5 studding will do the trick. I could buy the tool again but the lock ring is frozen and I will probably have a mishap with the pin breaking knowing my luck.

'If it wasn't for bad luck I wouldn't have any luck at all.'

[MikeF]

Does the ammonia damage the paintwork?

Might do, but more importantly it can easilyy damage your eyes - it's very volatile and it will penetrate rapidly. Something we were always warned about when using it. http://www.atsdr.cdc.gov/MMG/MMG.asp?id=7&tid=2.

[NATURAL ANKLING]

Hi,
I sourced two online suppliers for M 8 x 1.0 p bolt, works out at £4.35 - 4.50 something, ebay I think is £4.27 posted M8 x 1P x 50 Long.
You will need a few M8 penny washers or a 10MM nut will do but the stack height needs to give thread in the actual BB spindle end so 50 MM long is a good bet. you can always add more washers if the bolt bottoms out with longer BB's.
You have the cheaper tool like me.
The BB tool with a spigot will work better (never used one but I have a cassette similar yet to try), m5 studding nice trick and easy, but will need to use large spanner or as said 3/4" drive socket.
Your high street shops malls etc wont do that bolt, only specialist screw type industrial supplies etc, shop will have a chance, they order ten and you can sell to your mates or us

Had a frame in the vice the other day a right pig skip bike well seized and sheared the retaining ring in two but it was plastic.
Only a retained (I used a G clamp, Bruceys m5 trick, I am assuming all BB's are hollow?) tool will do in this case.
Good luck.

http://www.ebay.co.uk/itm/M8-x-1P-Fine- ... 4605900aae
"Socket Screw - Steel Grade 12.9 Cap Head Socket Screw Allen Bolt (Fine Pitch)
Metric Sizes: M8 x 1P (8mm in Diameter)
Calculate Shoulder/Thread Lengths Below:
All M8 Bolts are Fully threaded to the head up to 35mm long. Lengths of 40mm and upwards all have a threaded portion of 28mm (the remainder being plain shoulder)
Example. Plain shoulder length for M8 x 50mm : If thread length is 28mm, Shoulder Length = (50mm - 28mm) =22mm "

[Brucey]

actually the M5 studding is for QR hubs to retain freewheel/cassette removers. With a hollow BB spindle you can go up to M6 or even 1/4" studding, which would be a lot stronger.

BTW if you have an old top cap from an A-Head headset, this can make a good 'washer' for some of these lash-ups

cheers

[andrew_s]

I am a bit surprised that the BB tools don't come with a securing bolt, maybe the pro ones do

This Tacx tool screws into the end of the BB axle.
It holds well - I used one in combination with a 32 mm ring spanner, with me standing on the end and jumping (something like 300-330 Nm, I think). When the lockring came out, it dragged the BB cartridge out with it, leaving the flanged end behind (old and new BB)

This is the Pedros tool to hold a normal BB tool in place
[edit] the forum doesn't seem to like the (cheaper) GetNastyComputerVirusHere.co.uk link: "www.getnastycomputervirushere.co.uk"
[edit again] it seems to be changing all occurrences of "probikekit"

[garygkn]

I bought the Pedros BB Tool it holds the removal tool on tight - no slipping.
The bb cartridge is seized in the shell.
The drive side is steel the other side is plastic.
The plastic part tore off and left the rest of the plastic cup in situ.
The steel cup won't budge.
I've burnt a hole through the plastic non drive side cup I was going to try and get some oxalic acid in there to eat the rust or just get some diesel in there and try again but this time on the drive side with a long pipe on the end of the bb tool.

I can't believe it won't budge.