Stuck FSA chainset in Shimano BB

brearley
brearley Posts: 165
edited May 2016 in Workshop
My SRM is stuck in the bottom bracket, I need to remove it as it needs to be sent off for calibration and a new battery.

I have tried the following:
Rubber mallet repeatedly - no movement
Compressed air upside down to freeze and shrink the spindle slightly, rubber mallet - no movement

Removing the nds bb cup isn't possible as it is a wheels manufacturing bb30 converter so screws together in the centre, there is no way to stop the ds cup spinning when trying to undo the nds.

my next thought is to place a 24/25mm socket over the spindle and knock it out with a more weighty hammer.

I have tried to destroy the nds bearing but there is no way of removing the inner race.

Any further suggestions?

I somehow need to clamp the drive side and use some sort of press to push it through, obviously i need to clamp against the ds bearing cup so space is tight.

Comments

  • dgunthor
    dgunthor Posts: 644
    block of wood in front of spindle and a weighty hammer?
  • lesfirth
    lesfirth Posts: 1,382
    This can be a two man job. One to hold the frame tight, as close to the chainset as possible and one to hit the end of the spindle with a plastic or wooded mallet. If that does not work hit it harder. What you do not want is the whole frame/wheels springing about.
  • MikeBrew
    MikeBrew Posts: 814
    Is it a threaded cup BB ? If so you could try to unscrew the non-drive-side cup off of the crank axle. Lying the bike on it's side (each side in turn) and letting WD40 soak down between the axle and the inner bearing race might help a little , also.
  • keef66
    keef66 Posts: 13,123
    MikeBrew wrote:
    Is it a threaded cup BB ? If so you could try to unscrew the non-drive-side cup off of the crank axle. Lying the bike on it's side (each side in turn) and letting WD40 soak down between the axle and the inner bearing race might help a little , also.

    Did you read this bit of the OP?

    "Removing the nds bb cup isn't possible as it is a wheels manufacturing bb30 converter so screws together in the centre, there is no way to stop the ds cup spinning when trying to undo the nds"
  • brearley
    brearley Posts: 165
    got it out eventually, screwed an old rear skewer through the axle and tightened it and then tapped the end with a hammer so that the pressure was applied to the skewer and not the axle. It came out quite easily however the drive side bearing came with it so now i need a bearing puller to get this side off but this is less of a problem.

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