Mountain-Goat Posted September 29, 2014 Posted September 29, 2014 Hi guysSo i dont want to spend much more money atm. Any tips for using your old double chainring bolts for a ss chainring ? Instead of buying ss spefic chainring bolts. I have tried using washers but the washers interfere with the chain on the teeth of the chainring. Any other methods ? Thanks for the help
jcmeyerSS Posted September 29, 2014 Posted September 29, 2014 turn the nut half around. so the broad head of the nut pushes against the crank.
Mountain-Goat Posted September 29, 2014 Author Posted September 29, 2014 turn the nut half around. so the broad head of the nut pushes against the crank.Ok great, will give that a go. So all I do is turn the nuts the other way round ? No washers needed ?
jcmeyerSS Posted September 29, 2014 Posted September 29, 2014 I did this the first SS i built and lasted fine for 500km until i got my shortened bolts.the other option would be to grind down the bolts by about 5mm. here is a pic to show what I ment
jcmeyerSS Posted September 29, 2014 Posted September 29, 2014 Ok great, will give that a go. So all I do is turn the nuts the other way round ? No washers needed ? yip
TTBiker Posted January 22, 2015 Posted January 22, 2015 I recently removed my Granny chainring and had the same problem with the too long bolts. I went to the local hardware store and bought 5x spring washers. Just put the spring washers where the small ring used to be. Works perfect for me....
Ampandy Posted January 22, 2015 Posted January 22, 2015 Contact Wayne/kiwi. His are great and cost effective. Rather don't gap it.
s14phoenix Posted January 22, 2015 Posted January 22, 2015 or if you have a spare set you can always sand down the difference. did this before and worked well. You just goto be careful and know what you are doing... make sure the perfectly square again. etc... Or grind the side of the washer that is interfering away until it stops. All a bit ghetto but if done right it works... might not be able to go back to 2x though.... Or just spend the R100 or R200 bucks and buy the right stuff
Ampandy Posted January 22, 2015 Posted January 22, 2015 Chain ring bolts are designed to have the female hold the chain ring onto the crank allowing approx 2mm difference in depth. That 2mm depth allows for proper tightening. The o.d is 10mm on the female and thread size of the male is 8mm x.7 pitch. That variance of 2mm will allow for movement and thereby allow a shearing action of the bolts.
V12man Posted January 22, 2015 Posted January 22, 2015 Hi guysSo i dont want to spend much more money atm. Any tips for using your old double chainring bolts for a ss chainring ? Instead of buying ss spefic chainring bolts. I have tried using washers but the washers interfere with the chain on the teeth of the chainring. Any other methods ?Thanks for the helpUse a grinder..... on the nuts.... and safety goggles, and FFS don't hold the nut in your hand.... or with a set of pliers...
porqui Posted January 22, 2015 Posted January 22, 2015 Use a grinder..... on the nuts.... and safety goggles, and FFS don't hold the nut in your hand.... or with a set of pliers... Turn the nuts onto a long bolt with the same thread and hold it that way.
Ampandy Posted January 22, 2015 Posted January 22, 2015 Good luck finding a bolt with m8x.7 pitch thread. If you really can't source single bolts and in joburg bring to me and I'll turn them down on a lathe. Using a grinder or other means will damage the very fine thread.
V12man Posted January 22, 2015 Posted January 22, 2015 Good luck finding a bolt with m8x.7 pitch thread. If you really can't source single bolts and in joburg bring to me and I'll turn them down on a lathe. Using a grinder or other means will damage the very fine thread.aesthetics are a bit rough, but I have done several this way and it worked fine - but I do have a little hand eye co ordination... and steady hands.
Ampandy Posted January 22, 2015 Posted January 22, 2015 And how would you propose cleaning the threads so that they take properly without cross threading or damaging the pitch ? The norm would be to turn a bolt through to clean/ restore cut threads but I have yet to find a bolt available with that pitch.
montyzuma Posted January 22, 2015 Posted January 22, 2015 Just file them down on a flat file. Alu bolts in particular are soft & easy to do. I've done it when I couldn't be bothered to go to LBS and took 20 min & worked perfectly
Bobbo_SA Posted January 22, 2015 Posted January 22, 2015 And how would you propose cleaning the threads so that they take properly without cross threading or damaging the pitch ? The norm would be to turn a bolt through to clean/ restore cut threads but I have yet to find a bolt available with that pitch. Could you not just run the bolt through from the other side?
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