Chainset Removal

rowman

Help please....

I've stripped the extractor thread on my chainset. Have anyone out there got any tips for removing it?

things I've already tried:

1. Removing the locking bolt and cycling, hoping that it will eventually work loose. I've now done over 200 miles and its still there!

2. Attempted and failed to source an open ended bottom bracket tool (suitable for Veloce 2006 star type BBs)

3. Lump hammer....

Any other sugestions?

Thanks

Rich

rdaviesb

Heat and then the lump hammer?

term1te

In the past I’ve used a tool that’s designed for removing some part of a car engine, I forget which bit. Its like a cross between a very fat two pronged fork and a chisel. The gap between the prongs is just the right distance to fit over a square tapered BB. The prongs widen from the tip, so you insert it between the chainset and the frame, and force it down, with a hammer, until the chainset drops off. I’ve had to use it twice, but only on steel frames, and it left some nasty marks on the end of the BB cartridge. I’d think twice before attempting it with any other frame material. I got the tool from Halfords for less than a fiver, but that was a few years back.

Good luck

Ma coli

The tool you've described might be a balljoint splitter, and yes, I'd only use it on a steel frame too. Machine mart has them, alternatively they sell hub pullers like this and all other manner of puller, too. I'd try using heat (blowtorch, if you don't have one a small metal cup, 2-4cm across, filled with meths and lit under the chainset) then squirt some liquid into the bottom bracketbolthole to cool and shrink it while lamping the splitter with the hammer.

rowman

I have a hot-air gun for paint stripping. I'll give it a go with that tonight.

Thanks

Rich

SDP

take bolt out & ride it a few times up hill in a big gear .... carefully

if not get the heat gun out ..

mdg1157

If your not bothered about the chainset, the lump hammer works!!

term1te

Ma coli wrote:

The tool you've described might be a balljoint splitter, and yes, I'd only use it on a steel frame too. Machine mart has them, alternatively they sell hub pullers like this and all other manner of puller, too. I'd try using heat (blowtorch, if you don't have one a small metal cup, 2-4cm across, filled with meths and lit under the chainset) then squirt some liquid into the bottom bracketbolthole to cool and shrink it while lamping the splitter with the hammer.

Yes, it was a ball joint splitter exactly as the one in the image.

stevebendall

The hub pullers in the 2nd picture above should do a better job, and far less abusive so should pull it off without any damage, the bal joint splitter will damage the frame, although you could try fitting a thin sheet of wood (very thin ply or similar) to the frame side to avoid damaging the BB/shell

You can usually hire hub pullers if you don't want to buy, or could try a local garage for a donation of beer money!

normanp

I used a two pronged version of the hub puller (I called it a 'gear puller' - is that wrong?) for years on one bike - for non sealed BBs where I removed, re-greased and adjusted it more often - it was a bit awkward but worked just fine.

LeighB

I have had the same problem with a chain set; the chain ring side striped. I removed this without damaging anything by using a hammer and wood drift. The drift was an eight inch section of a cutrain pole about 1 inch diameter. A couple of sharp cracks (to the wood drift on the back of the spider) with a pound hammer and problem solved.

Ma coli

Any luck?

rowman

Yesterday I purchased a hub puller and after 15 minutes playing around to get grip on the curved bits of the chainset I managed to get it off....

I cycled into work this morning on a lovely smooth bottom bracket.

Thanks to everyone who contributed

Rich