- Seized Nipples?
As do I ppPosted 8 years ago
When a liquid evaporates, its molecules must separate themselves from their attachment with others in the liquid and then move off into the air space above. The molecules in some kinds of liquids, like oil for example, are rather large and well-tangled up and attached to each other. This means that evaporation, if it occurs at all, is very slow. That is why cooking oil, even though sometimes heated to a very high temperature, does not evaporate to an appreciable extent.Richie_BSubscriber
Not as exciting as it sounds.
Do any of you wheel builders have any tips? Got a pair of Campag Proton wheels I can get them true but approx half the nipples are seized. Also is there a way of avoiding them re-seizing? They are on my training :oops:/commuting bike so they get the worst of the weatherPosted 8 years agoReluctantMember
Oil when building, linseed is good. But any old oil is ok, the thread and the nipple bed/eyelet of the rim. Brass is the only way. Alloy nips are ok for race wheels that you want for a season, but if building a pair to last, sod the minute weight saving and go for good old fashioned, reliable brass.Posted 8 years ago
I’ve given up on seized nips on lots of wheels, cut em out and start again. De-tension the wheel as much as poss before cutting spokes. That way you minimise the risk of the rim going “ping”.
I guess what we’ve got here is bi-metalic corrorion, same as when an alloy post siezes into a steel frame. So maybe you could apply same methods? Saturated solution of caustic soda dropped onto nipple threads – careful now! Might help with an overnight soak. Or apply heat, can sometimes break down the corrosion. Very localised heat with one of those camping lighters maybe? (like a mini blowtorch)
Good luck and mind your fingers!coffeekingMember
Oils tend to migrate away from the nipple a little due to the wheel rotation and capiliary effect, grease would work better technically due to its more viscous nature but practically I’m not sure the difference would be noticeable.Posted 8 years ago
<thinks to self>
Wonder if wax would work? Waterproof, fairly solid, lubricant.
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