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Thread: damaged cranks?

  1. #1
    consistent inconsistency habitus's Avatar
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    damaged cranks?

    poop.

    continuation of this thread in which i told the saga of the mysterious creaking that everyone's had at some point(s). well, i'm starting a new chapter.

    take a look here. after greasing the spindle and tightening the cranks as much as i could, the creak temporarily stopped. however, it came back on a longer ride, and now it's back in full force. i still think the spindle/crank interface, in some way, is the culprit, and i'm wondering if what's going on in these pictures would cause the creaking. see the pitting in the two pictures? i don't see pitting like that on the other cranks i have. could've been caused by torquing too much?

    damaged, right? (and aren't my fingers quite petite?)


    every scar has a story

  2. #2
    i don't stop travsi's Avatar
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    wow, that looks pretty damned bottomed out.

  3. #3
    Iguana Subsystem dolface's Avatar
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    looks to me like your cranks and bb spindle have incompatable tapers

  4. #4
    consistent inconsistency habitus's Avatar
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    Quote Originally Posted by dolface
    looks to me like your cranks and bb spindle have incompatable tapers
    i don't see how as i used miche cranks and bb (and swtiched to phil wood ISO tapered BB for a weekend). so i'm sure they were compatible.

    i noticed when i greased the spindle i could sit the cranks farther in on the spindle. could that have caused it?
    every scar has a story

  5. #5
    carpe napum
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    The grease/no grease question is bugging the hell out of me. My shimano 600 cranks started creeping up the spindle after I greased spindle during a rebuild last spring. Not just when I torqued the bolts, but riding as well (!?) Granted, they are very old cranks with a lot of miles, but they seemed to move farther/faster after I applied the grease.

    They don't creak and there's no free play on the crank/spindle connection. The holes look good and square with no evident rounding etc. But still and all, they are pretty much all the way up the spindle, and that ain't right.

    Jobst Brandt and others say grease on the spindle is no problem. Two local wrenches who I trust say absolutely no grease. What to do? I think I've been greasing 'em for years, and maybe that caused the problem?

  6. #6
    consistent inconsistency habitus's Avatar
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    Quote Originally Posted by lemurhouse
    The grease/no grease question is bugging the hell out of me. My shimano 600 cranks started creeping up the spindle after I greased spindle during a rebuild last spring. Not just when I torqued the bolts, but riding as well (!?) Granted, they are very old cranks with a lot of miles, but they seemed to move farther/faster after I applied the grease.

    They don't creak and there's no free play on the crank/spindle connection. The holes look good and square with no evident rounding etc. But still and all, they are pretty much all the way up the spindle, and that ain't right.

    Jobst Brandt and others say grease on the spindle is no problem. Two local wrenches who I trust say absolutely no grease. What to do? I think I've been greasing 'em for years, and maybe that caused the problem?
    see, i know that i need a torque wrench now in order to dismiss with all this guess work. if i had torqued the bolts to the recommeded level, it wouldn't have bottomed out.

    no grease
    yes torque wrench
    every scar has a story

  7. #7
    consistent inconsistency habitus's Avatar
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    so one more quick question (for now) before i'm off to buy a torque wrench:

    is there any way to detect a different between JIS and ISO spindles by "eyeballing" or measuring? i'm not sure which taper my phil BB is the more confusing this gets.

    thanks.
    every scar has a story

  8. #8
    shot pulling robot ThaRiddla's Avatar
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    did you check out the phil wood website? they have the listings of BB spindle types on there if you know the model number....here is the pdf of the stainless steel models

    http://www.philwood.com/Price%20List...racketSets.pdf

  9. #9
    Senior Member trespasser's Avatar
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    Try 107mm shimano BB now with that miche. JIS and ISO have same taper angles, but JIS is slightly larger. so worn taper of your miche might work fine with JIS now.

  10. #10
    consistent inconsistency habitus's Avatar
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    Quote Originally Posted by ThaRiddla
    did you check out the phil wood website? they have the listings of BB spindle types on there if you know the model number....here is the pdf of the stainless steel models

    http://www.philwood.com/Price%20List...racketSets.pdf
    yeah, i just emailed phil with pics of my BB to see if they can help.

    i think i might have to pop the bearings out to get to a serial number on the spindle.

    these cranks are done. i don't think i want to try them with another BB. once i determine if the phil BB is ISO or JIS, i'll get cranks that are compatibile and go from there!
    every scar has a story

  11. #11
    consistent inconsistency habitus's Avatar
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    sorry to keep botherin' about this, but i'm trying to figure this out so i can move on...

    see my post in mechanics about ISO/JIS difference: is this valid?
    http://www.bikeforums.net/showthread...90#post1832590
    every scar has a story

  12. #12
    Retrogrouch in Training bostontrevor's Avatar
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    Interesting, apart from being bottomed out, the crank seems to be in decent condition.

    As for the grease/no grease question, there's a really nice long thread here where the question is fully explored. The final answer in my book comes down to, there seem to be good reasons to grease and the only reason not to is, "that's what I've always been told."

  13. #13
    consistent inconsistency habitus's Avatar
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    Quote Originally Posted by bostontrevor
    Interesting, apart from being bottomed out, the crank seems to be in decent condition.

    As for the grease/no grease question, there's a really nice long thread here where the question is fully explored. The final answer in my book comes down to, there seem to be good reasons to grease and the only reason not to is, "that's what I've always been told."
    trevor, would you expect other damage on the cranks? yeah, they're in decent condition, but only recently did i damage them. haven't been riding with them like that for more than a couple weeks.

    honestly, i think i just torqued it too much with the grease on there. it wasn't the grease that caused the damage--it was me!--but i could get the cranks deeper on the spindle with it on there. i picked up a torque wrench yesterday and was surprised what 400 in-lbs felt like! less than i thought.

    oh, and brent @ phil wood confirmed that my BB is in fact ISO. yay for fact!
    every scar has a story

  14. #14
    Retrogrouch in Training bostontrevor's Avatar
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    Quote Originally Posted by habitus
    trevor, would you expect other damage on the cranks?
    Pincushioning is usually the order of the day.

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