You sure about that?whenfoxforks-ruled said:The pinch bolts on the fork clamps. Too tight will seize the parts inside from sliding up and down smoothly.
mudpack said:Actually, threads don't stretch, they pull.
Rich Rohrich said:... so if you plan to use a torque wrench, you need to break out the moly based assembly lube as well.
Joburble said::cool: and don't put too much lube in the hole or the bolt may hydraulic and you will get a false torque reading. Just lightly lube the bolt threads.
The triple clamps to forks needs to be cleaned of flashing, and put together dry. Proper torque is very important on the clamps. Too tight will squeeze the inside of the upper fork leg, and impair the slider from going up and down. Conventional forks, I have forgot about already? I am no engineer, but I hopped a train once. The lube or lock tight slows corrosion also. Well it sure makes taking apart more fun than replacing half the bikes fasteners, due to be seized. The cheap alternatives? Some can not even lube or use the correct fasteners. Expert restoration process my eye, with hardware store nuts and bolts? Oh boy! Its always the little things. I would have forgot about all the stripped and abused parts, if it was not for this recent build a bike from fleabay cheap idea, and the parts from perfect running bikes, sorry. But something so trivial could be, and is over looked way too much. If people quit buying and using junk, wouldn't they quit selling it? Vintage Bobmudpack said:You sure about that?
mudpack said:Most service manuals that give a torque value for a particular fastener give that value for dry, clean threads.
I would use anti-sieze in two instances:ellandoh said:What About Anti-Sieze??
That is excellent advice, Rich, and I hope my KDX200 brothers here will apply that to what I write as well.Rich Rohrich said:The best advice I can give is don't take my word for it,
The clamping force of a threaded fastener is not one value for all fasteners. Clamping force per thousandths of an inch stretch varies according to:Rich Rohrich said:A common engineering rule of thumb is a stretch of .001 inch per inch length of a fastener develops about 30,000 psi clamping force in steel.
mudpack said:The clamping force of a threaded fastener is not just one value. Clamping force per thousandths of an inch stretch varies according to:
A) Fastener length (from under the head to the last free thread).
B) Fastener diameter.
C) Fastener tensile strength, including material and heat treatment.
mudpack said:Actually, threads don't stretch, they pull. If you can't apply full torque on a fastener, the threads are pulled.
Indeed it does, and indeed there is, Rich.Rich Rohrich said:.... a relationship between fastener stretch and clamping force exists, and that there is an elastic limit to even something as tough as a steel bolt.
mudpack said:Indeed it does, and indeed there is, Rich.
I haven't taken your responses as any sort of personal attack, Rich, and hope you aren't taking mine as such.
I would have pointed out the error no matter who had posted it.
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