In marine applications, the copper is to prevent marine growth (Cu is toxic to most marine organisms).
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Tell that to all the marine organisms that rely on copper in the oxygen transport medium in their blood. Nutritionists often cite shellfish as a food source high in copper.
The British used to put sheet copper on the bottom of their sailing ships to prevent marine growth from fouling the hulls and slowing them down. In modern times, many states' environmental regulators have outlawed copper-based anti-fouling paints because it kills marine life in the docking areas.
As with humans, the dose makes the poison. Many animals require a small amount of copper, but a large dose will kill them.
i enjoy (so far) torqueing auto heads for example and have a clod's touch for the bolt and nut at this point which is basic non-mechanic. the torque touch for the spindle/crank IS delicate. one side is also different from the opposite in feel and visual inward bound crank over spindle... distances:HxWxL. yaknow itsa spatial, right? but, the older model i ride incorporates a visual mark to stabilize what would otherwise be one dimensional(toxins?) and that's the rubber washer under the spindle's allen bolt. The noted deformation of the rubber washer is the same for both sides though the torque feel is different. i suppose if you're dealing with a nut(!) then the threads that remain halt any undue torque no matter what kinda slippery feedback that the hand feels with the crank passing down over the anti-seize and the spindle. i use blue oem loctite in there so despite the diff in slippery feel, the viz distances say leave it there and the locktite takes over. no problems so far. and placing a file mark at the back end...
I think I'll just see if anything untoward happens to the jump bike (greased taper) before I start greasing all new fittings, but from what you guys have been saying I don't expect to notice any difference.
cheers! gnaw. the grease increases the probability of screwing the mount up. when the crank goes on the spindle comma it is mounted unless the piece was machined in Baltimore. the torque fixes the crank to the spindle. the crank/nut/bolt does not slide the crank back on the spindle. not supposed to, the surfaces are supposed to match. click. the never seize that allows easy removal after after after without pulling the BB out of the HS makes IT SEEM (which we gnaw knot rite?) as if the mech should screw the unit down tighter Which HE SHOULD KNOT as as you read previously-its already mounted. i hope this isn't confusing to readers in the NW. gurgle gurgle. the big deal here. beyond not thinking, "well it doesn't feel tight enough so I'll just sit here and reef on it for another 20 minutes," is prepping all surfaces clean, threads everything. no burrs. yagotta look at the little ^%$%&&! inspecto!!. then lube with locktite. this way, murphy effects cancel with care. equality. smoothness. NOW? why are the corners of some spindles tapers ground off leaving four spaces empty when mounted in the cranks? mounted in the cranks mounted in the cranks. rpt.
