Cambelt change price

[Clan]

Originally Posted by Laird Scooby

Not necessarily - with steel, definitely not, copper, brass and aluminium you can but it compromises the annealing process :

https://en.wikipedia.org/wiki/Annealing_(metallurgy)

I prefer to let any of the latter three cool naturally as it gives a longer lasting durability, better for crush washers IMHO but each to their own.





I know the sort of client you mean Luke, i'd definitely try my WhatsApp suggestion and see what happens. Either way it works as a win-win for you then!

from the above article

" Copper, silver and brass can be either cooled slowly in air, or quickly by quenching in water.[1] In this fashion, the metal is softened and prepared for further work such as shaping, stamping, or forming."

That's what i said didn't i ?

Quenching copper in water is certainly what I was taught in school and later in technical college .. and has proved to leave copper is a soft clean state again over the last 50 years of me doing it .

[Laird Scooby]

Originally Posted by Clan

from the above article

" Copper, silver and brass can be either cooled slowly in air, or quickly by quenching in water.[1] In this fashion, the metal is softened and prepared for further work such as shaping, stamping, or forming."

That's what i said didn't i ?

Quenching copper in water is certainly what I was taught in school and later in technical college .. and has proved to leave copper is a soft clean state again over the last 50 years of me doing it .

I don't see your point - i also stated it could be quenched but was likely to compromise the annealing process by cooling it too quickly.

For the record, i was always taught that when annealing "soft" metals such as copper, aluminium, brass etc to let them cool naturally.

You're old enough and experienced enough to know that methods taught/recommended as research and so on alters how things are viewed - we were taught at different times with different knowledge, neither of us are wrong but we're both right on what we were taught.

That's why i said "Not necessarily" - i wasn't dismissing your method out of hand, merely putting forward a later interpretation of what was considered "Best Practice" when i was taught and the reasons for it.
I'm not a metallurgist, i don't pretend to know all the finer workings of the molecular structure of every metal on the planet but i do know what i was taught and why it works that way.

[classicswede]

http://www.materialseducation.org/ed..._of_Copper.pdf

To cause any problem the cooling would have to be super fast
"Cooling rate after annealing does not matter (except at 10 million degrees per
second the material would get harder again)"

The reason for quenching is one for speed and second so you do not have a hot object laying around


Whilst you can do it in the case of teh sump plug washer they cost so little it is not worth the time

[lynns hubby]

I can never understand that given the small cost of them, they are not supplied in a small bag in the box with the filter.
At least you have a chance to reuse a copper washer unlike some of the latest generation of flanged plugs with an "O" ring.

[griston64]

Originally Posted by lynns hubby

I can never understand that given the small cost of them, they are not supplied in a small bag in the box with the filter.
At least you have a chance to reuse a copper washer unlike some of the latest generation of flanged plugs with an "O" ring.

I sometimes order a few gen filters from Brookhouse and the washers are always sellotaped to the top of the filter. Not saying they are free but it's handy !