Material???

[latheboy]

Who knows what grade of Al disc carriers are made from ? anyone ?
I was thinking 6000 series but just needed to check

[TurboKat]

Why do you ask 2 Dogs Fucking?
Gunna make some?
I reckon you couldn't go far wrong with 6000.

[latheboy]

I've got a design for a full floater rear disc 7 ants wanking !!
Got a quote for one out of 5083 but the mob i got it from dont know what i've asked of them .. and i didnt know if it'll be good nuf

[EXBEN]

Yes I use 5mm 5083 for disk carriers. It's a lot tougher than 6000 series & is the only one I'd reccomend other than 7000 series.

[latheboy]

Werd ...

[Deano]

why use ally when you can use carbon fibre?

you will have to put a coating on it of some sort as the 5083 i made the thin ring on the clutch covers out of will get that white corosion shit if left natural.

the 6061 that the main body is made from stays perfect

[EXBEN]

Deano is right
5083 does corrode quicker than 6060-6061, but yes it can be anodised.

[speeddemon]

5000 and 6000 series alloys provide adequate strength combined with good corrosion resistance, high toughness and ease of welding

for aircraft the very strong 7000 and 8000 series alloys are the norm, and the weldable 7000 series alloys can provide ballistic properties to match steel armour if you r up for it then for when cops start shooting your bike.

Check out this site I use for materials:

http://www.azom.com/Details.asp?ArticleID=3328

Quote site for 5083: "Alloy 5083 also retains exceptional strength after welding. It has the highest strength of the non-heat treatable alloys but is not recommended for use in temperatures in excess of 65°C."

OK so someone answer this - is it then suitable for a disc carrier with brake temps??? (obviously with thickness it is like anything would be) so its safer then to go with 6000 series if you want ultra light?? Seems material engineers think so...

[fimpBIKES]

it really starts to weaken at 65 degrees??

sure someone didnt leave a "0" off that?
sounds more like playdo than aluminium!

[EXBEN]

Would you say your disk carrier runs consistently above 65 degrees ?
My understanding is that above 65 degrees it doesn't meet the Australian standard for the pressure vessel & corrosion tests, therefore they have to say they don't recommend it above this temp.
Does that mean it's unsafe in this particular application ??
Practical experience tells me no. I've been using it for years & never had an issue with it.
Personally I think that 6000 series is too soft in this application.

[latheboy]

[quote]Originally posted by Deano

why use ally when you can use carbon fibre?

Carbon fibre is gay .. no not really but i wouldnt know the first thing about working with it :(
The plan is to get it hard anodised black
(EXBEN)Would you say your disk carrier runs consistently above 65 degrees ?
Well i hope not but it could hit that temp now and again so its past its recommended temp range and straight away its on the down hill spiral to shittin itself so say the manufactures .. thats worst case ... hmmm Might look into 7000 series .. At least i can do stoppies and block those bullets ... :D

[speeddemon]

Yer Ben I know others who have been using 5083 with no probs - just found that temp figure interesting to say the least. i guess there is more chance of over shooting a corner or washing the front out due to rider error than the carrier giving away under such extreme braking.

[Blackkat]

I just had some front disc spacers made from 10mm 5083 and was going to use it for the engine mounts as well.
The 5083 was used as I was told it was stronger?

[speeddemon]

and that it is.....;)