"Justin C" wrote about wanting some bronze nuts:
These any good?
"Justin C" wrote about wanting some bronze nuts:
These any good?
All you need is a nut of the wrong size, a set of 3 taps and a drill bit. No workshop.
NT
On 23/04/2013 18:41, Justin C wrote: ...
The problem with brass in seawater is not galvanic corrosion, but that the zinc leaches out of the metal, leaving a porous, weak matrix of copper behind. If the nuts will normally be dry, that may not be much of a problem, but keep an eye out for them starting to look reddish. There are brasses that have tin added to reduce the risk of zinc loss, so, if you can get naval brass, that will be better than plain brass, while, as others have said, aluminium bronze will be best of all.
Colin Bignell
Three taps? Please excuse my ignorance.
Justin.
It's not just you - I don't see why you would need three taps for a single size of through hole either. (I doubt many wrong size nuts could be drilled and tapped to a larger thread without weakening them too much anyway.)
(Blind hole is different, if you want threads to the bottom, you do want three or at least two taps:
workshop.
Taps come in sets of 3 for each hole size: 1st, 2nd, finishing. Taking all the metal off in one go is asking a lot. You can also get them in lesser sets, which should be fine for a soft metal like brass/bronze.
Be sure to use the right drill bit size, something close won't do.
NT
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