Disc material

Stepdaughter has left her cage on our drive while she goes on holiday.
Today I noticed that the brake discs had got very rusty, in about a week of
no driving. Now car brake discs (like those on my old Guzzi, which also
rusted them) are cast iron. Early Jap bikes got around the rust thing by
using stainless steel, but the penalty was no brakes in the wet. So how
come the Bandit brakes perfectly well [1], wet or dry, and yet doesn't rust
the discs when left outside in the rain? What are they making brake discs
out of these days?

[1] for budget values of "well", i.e. adequately.

--
Rich B
Bandit 1200S
Take out the obvious to email me.

Rich B wrote:

> Stepdaughter has left her cage on our drive while she goes on
> holiday. Today I noticed that the brake discs had got very rusty, in
> about a week of no driving.

Yeah, my newer RX-7 also does that when the disks get wet...

> Now car brake discs (like those on my
> old Guzzi, which also rusted them) are cast iron. Early Jap bikes
> got around the rust thing by using stainless steel, but the penalty
> was no brakes in the wet. So how come the Bandit brakes perfectly
> well [1], wet or dry, and yet doesn't rust the discs when left
> outside in the rain? What are they making brake discs out of these
> days?

I think it's some sort of stainless steel still, but the friction
materials have improved a lot so they even work in the rain these days.

--
Morini Corsaro 125 | CB450K4 | XL250 Motosport x2 | 900SSD
Triumph T-Bird chop | K1100LT BOTAFOF #33 TWA#10
The UKRM FAQ: http://www.ukrm.net/faq/index.html
"Je profite du paysage" - Joe Bar

Timo Geusch wrote:

> Rich B wrote:
>
>> Stepdaughter has left her cage on our drive while she goes on
>> holiday. Today I noticed that the brake discs had got very rusty, in
>> about a week of no driving.
>
> Yeah, my newer RX-7 also does that when the disks get wet...
>
>> Now car brake discs (like those on my
>> old Guzzi, which also rusted them) are cast iron. Early Jap bikes
>> got around the rust thing by using stainless steel, but the penalty
>> was no brakes in the wet. So how come the Bandit brakes perfectly
>> well [1], wet or dry, and yet doesn't rust the discs when left
>> outside in the rain? What are they making brake discs out of these
>> days?
>
> I think it's some sort of stainless steel still, but the friction
> materials have improved a lot so they even work in the rain these
> days.

Aha. Same discs, better pads. Makes sense. Ta..

--
Rich B
Bandit 1200S
Take out the obvious to email me.

"Rich B" <richardTHEOBVIOUSbrookman@btinternet.com> wrote in
news:5hhiepF3l0jluU1@mid.individual.net...
> Stepdaughter has left her cage on our drive while she goes on holiday.
> Today I noticed that the brake discs had got very rusty, in about a week
> of no driving. Now car brake discs (like those on my old Guzzi, which
> also rusted them) are cast iron. Early Jap bikes got around the rust
> thing by using stainless steel, but the penalty was no brakes in the wet.
> So how come the Bandit brakes perfectly well [1], wet or dry, and yet
> doesn't rust the discs when left outside in the rain? What are they
> making brake discs out of these days?

Probably another stainless steel alloy. They come in soft, hard, strong,
easy to machine, polishable, flame resistant, tailored for different
forms of corrosion and and and ....................
That plus, as someone else said, suitable pads.

--
Ole Holmblad - Göteborgs Prima MCK / MK Pionjär
TDM850 / WR450F FL#44 OTC#489 UKRMSBC#08
SGFPTH#00 Remove hat to answer by mail

OH- wrote:

> "Rich B" <richardTHEOBVIOUSbrookman@btinternet.com> wrote in
> news:5hhiepF3l0jluU1@mid.individual.net...
>> Stepdaughter has left her cage on our drive while she goes on
>> holiday. Today I noticed that the brake discs had got very rusty, in
>> about a week of no driving. Now car brake discs (like those on my
>> old Guzzi, which also rusted them) are cast iron. Early Jap bikes
>> got around the rust thing by using stainless steel, but the penalty
>> was no brakes in the wet. So how come the Bandit brakes perfectly
>> well [1], wet or dry, and yet doesn't rust the discs when left
>> outside in the rain? What are they making brake discs out of these
>> days?
>
> Probably another stainless steel alloy. They come in soft, hard,
> strong, easy to machine, polishable, flame resistant, tailored for
> different forms of corrosion and and and ....................
> That plus, as someone else said, suitable pads.

Right, thanks. I gave the B12 a wash down yesterday, and put it away
overnight. Today, the rear disc is showing slight signs of rust, but the
front pair are pristine. Surely Suzuki aren't using different alloys front
and rear? Don't answer that, I know they aren't, it's just one of those
things, innit.

--
Rich B
Bandit 1200S
Take out the obvious to email me.

"Rich B" <richardTHEOBVIOUSbrookman@btinternet.com> skrev i meddelandet
news:5hk47kF3ko5qbU1@mid.individual.net...
>
> Right, thanks. I gave the B12 a wash down yesterday, and put it away
> overnight. Today, the rear disc is showing slight signs of rust, but the
> front pair are pristine. Surely Suzuki aren't using different alloys
> front and rear? Don't answer that, I know they aren't, it's just one of
> those things, innit.

Suzuki probably never made a brake disc. They will source the whole
brake system from a specialist company. If that company makes discs
in large quantity from different materials there is no reason, technical
or economic, to use the same alloy front and rear.

In my limited experience, the rear disc is killed by dirt and the front
by heat. There are different demands on the pads as well. So it is quite
reasonable to expect different disc materials.

We often do the mistake of thinking along the lines of how we would
make one off items on our own. Industrial scale production changes
what is practical.

--
Ole Holmblad - Göteborgs Prima MCK / MK Pionjär
TDM850 / WR450F FL#44 OTC#489 UKRMSBC#08
SGFPTH#00 Remove hat to answer by mail

	#1
Rich B	Disc material Stepdaughter has left her cage on our drive while she goes on holiday. Today I noticed that the brake discs had got very rusty, in about a week of no driving. Now car brake discs (like those on my old Guzzi, which also rusted them) are cast iron. Early Jap bikes got around the rust thing by using stainless steel, but the penalty was no brakes in the wet. So how come the Bandit brakes perfectly well [1], wet or dry, and yet doesn't rust the discs when left outside in the rain? What are they making brake discs out of these days? [1] for budget values of "well", i.e. adequately. -- Rich B Bandit 1200S Take out the obvious to email me.

	#2
Timo Geusch	Re: Disc material Rich B wrote: > Stepdaughter has left her cage on our drive while she goes on > holiday. Today I noticed that the brake discs had got very rusty, in > about a week of no driving. Yeah, my newer RX-7 also does that when the disks get wet... > Now car brake discs (like those on my > old Guzzi, which also rusted them) are cast iron. Early Jap bikes > got around the rust thing by using stainless steel, but the penalty > was no brakes in the wet. So how come the Bandit brakes perfectly > well [1], wet or dry, and yet doesn't rust the discs when left > outside in the rain? What are they making brake discs out of these > days? I think it's some sort of stainless steel still, but the friction materials have improved a lot so they even work in the rain these days. -- Morini Corsaro 125 \| CB450K4 \| XL250 Motosport x2 \| 900SSD Triumph T-Bird chop \| K1100LT BOTAFOF #33 TWA#10 The UKRM FAQ: http://www.ukrm.net/faq/index.html "Je profite du paysage" - Joe Bar

	#3
Rich B	Re: Disc material Timo Geusch wrote: > Rich B wrote: > >> Stepdaughter has left her cage on our drive while she goes on >> holiday. Today I noticed that the brake discs had got very rusty, in >> about a week of no driving. > > Yeah, my newer RX-7 also does that when the disks get wet... > >> Now car brake discs (like those on my >> old Guzzi, which also rusted them) are cast iron. Early Jap bikes >> got around the rust thing by using stainless steel, but the penalty >> was no brakes in the wet. So how come the Bandit brakes perfectly >> well [1], wet or dry, and yet doesn't rust the discs when left >> outside in the rain? What are they making brake discs out of these >> days? > > I think it's some sort of stainless steel still, but the friction > materials have improved a lot so they even work in the rain these > days. Aha. Same discs, better pads. Makes sense. Ta.. -- Rich B Bandit 1200S Take out the obvious to email me.

	#4
OH-	Re: Disc material "Rich B" <richardTHEOBVIOUSbrookman@btinternet.com> wrote in news:5hhiepF3l0jluU1@mid.individual.net... > Stepdaughter has left her cage on our drive while she goes on holiday. > Today I noticed that the brake discs had got very rusty, in about a week > of no driving. Now car brake discs (like those on my old Guzzi, which > also rusted them) are cast iron. Early Jap bikes got around the rust > thing by using stainless steel, but the penalty was no brakes in the wet. > So how come the Bandit brakes perfectly well [1], wet or dry, and yet > doesn't rust the discs when left outside in the rain? What are they > making brake discs out of these days? Probably another stainless steel alloy. They come in soft, hard, strong, easy to machine, polishable, flame resistant, tailored for different forms of corrosion and and and .................... That plus, as someone else said, suitable pads. -- Ole Holmblad - Göteborgs Prima MCK / MK Pionjär TDM850 / WR450F FL#44 OTC#489 UKRMSBC#08 SGFPTH#00 Remove hat to answer by mail

	#5
Rich B	Re: Disc material OH- wrote: > "Rich B" <richardTHEOBVIOUSbrookman@btinternet.com> wrote in > news:5hhiepF3l0jluU1@mid.individual.net... >> Stepdaughter has left her cage on our drive while she goes on >> holiday. Today I noticed that the brake discs had got very rusty, in >> about a week of no driving. Now car brake discs (like those on my >> old Guzzi, which also rusted them) are cast iron. Early Jap bikes >> got around the rust thing by using stainless steel, but the penalty >> was no brakes in the wet. So how come the Bandit brakes perfectly >> well [1], wet or dry, and yet doesn't rust the discs when left >> outside in the rain? What are they making brake discs out of these >> days? > > Probably another stainless steel alloy. They come in soft, hard, > strong, easy to machine, polishable, flame resistant, tailored for > different forms of corrosion and and and .................... > That plus, as someone else said, suitable pads. Right, thanks. I gave the B12 a wash down yesterday, and put it away overnight. Today, the rear disc is showing slight signs of rust, but the front pair are pristine. Surely Suzuki aren't using different alloys front and rear? Don't answer that, I know they aren't, it's just one of those things, innit. -- Rich B Bandit 1200S Take out the obvious to email me.