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View Full Version : HELP! Chainring/spider/bashguard problem


Oddjob
05-04-2005, 10:54 AM
Let me get this out of the way first... I'm an idiot

Last night when I was putting my drave train back together after degreasing it and making it look shiny I think I screwed up one of the bolts holding the bashguard and chainring to the spider. I'm running BMX cranks, with a 5 arm spider, an Aerial DS 110 bashy and a 38T chainring.

I overtightened it in an effort to get it to do up snugly in the recess on the bashy and chainring. Unfortunately it didn't do up snugly so the bolt and and the nut it goes into are now done up really tight yet they are still rotating in the recess. I then tried to undo them with the proper tools (allen key and FCL-20 spanner) but no matter how hard I try I can't get them undone, the FCL-20 just wont hold the nut hard enough. Why the stress, well the bashy and chainring aren't being held on securely, also the bashy is slightly misaligned and is rubbing against the chain in one spot on every revolution.

What on earth can I do? I've thought about drilling the bolt, but it will probably just spin with the drill bit. I've also considered creative use of superglue or super threadlock on the nut but that will probably just make the bolt sieze up more.

Is it time for a new chainring/spider/bashguard?

j5ive
05-04-2005, 01:44 PM
Try using a pair of vice grips or similar to keep the chainring bolt tool in the groove, if this fails- drill away.

jayisbikes
05-04-2005, 04:26 PM
the trick j5ive suggested works really well, but i have found it easier to us a bench mounted vise to hold all the bits together. it gives you some free hands and a bit more stability. just be careful that you dont clamp too tight and damage chainrings / bashgaurds. also a good idea to use softjaws in the vise too

sawtell
05-04-2005, 04:54 PM
... same problem here, but they are long bolts (e13 bash style) and no stores around here stock them, but when i do get some . . . i will be drilling my heart out, i found it helps if you use 'cutting compound', and drill on a slower speed.