locoboy
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| posted on 5/1/04 at 01:32 PM |
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M16 Callipers
Can anyone confirm if the M16 callipers are made of steel? I know thay feel like they are made of lead but i need to know if it will be ok to use the
Electrolysis de-rusting method on them?
If i can use this technique i guess it would be wise to cover the fluid holes to stop any "shitty" particles getting in there?
ATB
Locoboy
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ned
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| posted on 5/1/04 at 01:40 PM |
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i've had mine apart, i used 'the tool' on mine. see if my pics help:
http://www.locostbuilders.co.uk/users/ned/build/donorparts/index.htm
Ned.
beware, I've got yellow skin
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blueshift
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| posted on 5/1/04 at 02:06 PM |
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colm, it's fine, we electrolysed ours.
I'm not sure what they're made of but if it's not cast steel of some description then I'm a chinaman.
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locoboy
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| posted on 5/1/04 at 02:22 PM |
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nahow den mithta bluthift, <in best Chinese accent>
Did you block up the fluid holes and leave the pistons in?
Ned,
Me and my callipers, well infact all my car stuff are about 8 miles apart and i have no where to use said "tool" in this weather, i have
had the ones on my finished car apart an many occasions but was unsure of their suitablity for the electrolysis method.
ATB
Locoboy
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blueshift
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| posted on 5/1/04 at 06:06 PM |
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No, ours are completely stripped for rebuild.
I wouldn't care to comment on what might happen to any rubber bits etc and the risk of water contamination if you did them that way. We knew we
would be able to clean ours and flush them with meths and dry them before reassembly.
side note, I'm not sure if the bleed nipples were anodised or something, but I took one that had a kind of yellowy oily sheen kind of look on
the bits that weren't rusty, and electro-de-rusted it as a test. the rust got attacked but apparently so did this yellowy coating, those bits
were shiny silver (well steel) afterwards.
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Dick Axtell
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| posted on 6/1/04 at 03:10 PM |
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quote:
Originally posted by blueshift
I'm not sure what they're made of but if it's not cast steel of some description then I'm a chinaman.
Oh Mr. Woo, what shall we do....etc???
Gordon Bennet, deah boy, doncherknow cast iron when U lift it?? In this case, SG CI, for greater strength.
Someone asked elsewhere, why doesn't everyone use Alloy calipers?
To answer that, just check out the drop in aluminium's UTS with the sort of increased temps under heavy braking.
Work-in-Progress: Changed to Zetec + T9. Still trying!!
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GO
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| posted on 6/1/04 at 03:43 PM |
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SG?? UTS??? speak english man!
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blueshift
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| posted on 6/1/04 at 04:07 PM |
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weeeel.. isn't cast iron just a form of steel with lots of carbon in it?
hanging on to my british passport for dear life..
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stephen_gusterson
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| posted on 6/1/04 at 07:25 PM |
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its the other way around methinks - iron comes from the ground and the 'alloy' steel is made by adding carbon and other stuff to it
atb
steve
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blueshift
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| posted on 6/1/04 at 09:27 PM |
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I was under the impression that wrought iron was pure iron, then as you add carbon you go through mild through high carbon steels, then cast iron
which has quite a lot of carbon in it.
rather a dim memory though and may be utter tosh.
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Mark Allanson
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| posted on 6/1/04 at 09:51 PM |
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Moulten iron is very viscous, when high levels of carbon is added it lowers the viscosity to enable complex castings to be make, I think the carbon is
in the form of graphite. The cast iron is not strong but does not resonate (probably absorbs shocks instead of transmitting it), thats why Piano
frames are made from it.
In another thread about welding cut off parts of sierra bottom arms, there is a big discussion about welding to cast iron - the bottom arms are cast
steel, not iron. Cast steel has other metals added to make it castable and to improve the strength. You can weld to most cast steels without problems
as long as you use the correct rods (MMA). The only things made of cast iron on a car that I know of are some exhaust manifords, some brake cylinders
and things like alternator brackets on older cars
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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paulf
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| posted on 6/1/04 at 10:17 PM |
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What about cylinder blocks, liners, heads some crankshafts , most conrods, flywheels many crankpulleys, type 9 gearboxes, some diff housings brake
disks and many other parts.
Most of which are SG or in other words spheroidal graphite iron .This is a grade with round particles of graphite as its name inplies and has a much
closer structure than plain cast iron which has a jagged grain structure and is much weaker.
Paul
quote:
Originally posted by Mark Allanson
The only things made of cast iron on a car that I know of are some exhaust manifords, some brake cylinders and things like alternator brackets on
older cars
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Peteff
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| posted on 7/1/04 at 02:11 PM |
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SG is the marking on ductile iron, which is annealed after casting. It can be cast much thinner than grey iron and is a bastard to fettle after heat
treatment as it bends instead of shattering as we found out on the foundry end many years ago .
yours, Pete.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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