I have been given a set of unmarked, used brake disks which
unfortunately have been left out in the wet and are quite rusty. I'm
just wondering how to set about cleaning them up. Ideally I would put
them in thee lathe, but they are too big - any other suggestions for
surface rust removal please?



--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

"Harry Bloomfield" wrote in message
. uk...
I have been given a set of unmarked, used brake disks which unfortunately
have been left out in the wet and are quite rusty. I'm just wondering how
to set about cleaning them up. Ideally I would put them in thee lathe, but
they are too big - any other suggestions for surface rust removal please?

Wire brush.
Ideally a circular one mounted on an off-hand grinder, but it really depends
on what you mean by 'surface rust'
Mike.

Mike G expressed precisely :
"Harry Bloomfield" wrote in message
. uk...
I have been given a set of unmarked, used brake disks which unfortunately
have been left out in the wet and are quite rusty. I'm just wondering how
to set about cleaning them up. Ideally I would put them in thee lathe, but
they are too big - any other suggestions for surface rust removal please?

Wire brush.
Ideally a circular one mounted on an off-hand grinder, but it really depends
on what you mean by 'surface rust'
Mike.

That is what I had in mind.

The shine of the steel is still visible under the rust - so fairly
light rust, I just don't want to fit them and use the pads to remove
the rust.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

Harry Bloomfield wrote:
Mike G expressed precisely :
"Harry Bloomfield" wrote in
message . uk...
I have been given a set of unmarked, used brake disks which
unfortunately have been left out in the wet and are quite rusty.
I'm just wondering how to set about cleaning them up. Ideally I
would put them in thee lathe, but they are too big - any other
suggestions for surface rust removal please?

Wire brush.
Ideally a circular one mounted on an off-hand grinder, but it really
depends on what you mean by 'surface rust'
Mike.

That is what I had in mind.

The shine of the steel is still visible under the rust - so fairly
light rust, I just don't want to fit them and use the pads to remove
the rust.

then knock the worst off with sandpaper (emery/wet and dry is not
recommended) and put them on. every time you leave the car out in the damp
the disks rust a bit, so it won't really make too much difference in the
end.

"Mrcheerful" wrote in message
news:jbcdo.30289$r24.14393@hurricane...
Harry Bloomfield wrote:
Mike G expressed precisely :
"Harry Bloomfield" wrote in
message . uk...
I have been given a set of unmarked, used brake disks which
unfortunately have been left out in the wet and are quite rusty.
I'm just wondering how to set about cleaning them up. Ideally I
would put them in thee lathe, but they are too big - any other
suggestions for surface rust removal please?

Wire brush.
Ideally a circular one mounted on an off-hand grinder, but it really
depends on what you mean by 'surface rust'
Mike.

That is what I had in mind.

The shine of the steel is still visible under the rust - so fairly
light rust, I just don't want to fit them and use the pads to remove
the rust.

then knock the worst off with sandpaper (emery/wet and dry is not
recommended) and put them on. every time you leave the car out in the
damp the disks rust a bit, so it won't really make too much difference in
the end.

Fit the discs as they are, but put the old pads in. Use the car for a couple
of days. Then when the discs are cleaned up, change the pads. Seemples.

Steve

Mrcheerful brought next idea :
Harry Bloomfield wrote:
Mike G expressed precisely :
"Harry Bloomfield" wrote in
message . uk...
I have been given a set of unmarked, used brake disks which
unfortunately have been left out in the wet and are quite rusty.
I'm just wondering how to set about cleaning them up. Ideally I
would put them in thee lathe, but they are too big - any other
suggestions for surface rust removal please?

Wire brush.
Ideally a circular one mounted on an off-hand grinder, but it really
depends on what you mean by 'surface rust'
Mike.

That is what I had in mind.

The shine of the steel is still visible under the rust - so fairly
light rust, I just don't want to fit them and use the pads to remove
the rust.

then knock the worst off with sandpaper (emery/wet and dry is not
recommended) and put them on. every time you leave the car out in the damp
the disks rust a bit, so it won't really make too much difference in the end.

Angle grinder and cup brush worked fine. I have got them cleaned down
to the machining marks around the hub area, and the brake surfaces back
to a shine. Just two tiny pit marks on one of the rears on the braking
surface -so I'll call that a result then, apart from the angle grinder
breaking down half way.

I got them given free, after the previous owner fitted up-rated disks.
He says they have done 70k - I don't quite believe it. No grooving and
no detectable wear.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

On Wed, 25 Aug 2010 17:01:14 +0100, Harry Bloomfield
wrote:

I have been given a set of unmarked, used brake disks which
unfortunately have been left out in the wet and are quite rusty. I'm
just wondering how to set about cleaning them up. Ideally I would put
them in thee lathe, but they are too big - any other suggestions for
surface rust removal please?

New discs are pretty cheap for most cars - is it worth it?
--
asahartz woz ere

asahartz brought next idea :
On Wed, 25 Aug 2010 17:01:14 +0100, Harry Bloomfield
wrote:

I have been given a set of unmarked, used brake disks which
unfortunately have been left out in the wet and are quite rusty. I'm
just wondering how to set about cleaning them up. Ideally I would put
them in thee lathe, but they are too big - any other suggestions for
surface rust removal please?

New discs are pretty cheap for most cars - is it worth it?

At around (I would guess) £150 for a set, versus half an hours effort,
to me yes. I'm not by any means a greenie, but I also don't like to see
things wasted, which are perfectly usable.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

Harry Bloomfield wrote:
asahartz brought next idea :
On Wed, 25 Aug 2010 17:01:14 +0100, Harry Bloomfield
wrote:

I have been given a set of unmarked, used brake disks which
unfortunately have been left out in the wet and are quite rusty. I'm
just wondering how to set about cleaning them up. Ideally I would
put them in thee lathe, but they are too big - any other
suggestions for surface rust removal please?

New discs are pretty cheap for most cars - is it worth it?

At around (I would guess) £150 for a set, versus half an hours effort,
to me yes. I'm not by any means a greenie, but I also don't like to
see things wasted, which are perfectly usable.

front disc and pad kit for rover 75 is about 65 quid

Mrcheerful said the following on 25/08/2010 18:13:
Harry Bloomfield wrote:
Mike G expressed precisely :
"Harry wrote in
message . uk...
I have been given a set of unmarked, used brake disks which
unfortunately have been left out in the wet and are quite rusty.
I'm just wondering how to set about cleaning them up. Ideally I
would put them in thee lathe, but they are too big - any other
suggestions for surface rust removal please?

Wire brush.
Ideally a circular one mounted on an off-hand grinder, but it really
depends on what you mean by 'surface rust'
Mike.

That is what I had in mind.

The shine of the steel is still visible under the rust - so fairly
light rust, I just don't want to fit them and use the pads to remove
the rust.

then knock the worst off with sandpaper (emery/wet and dry is not
recommended) and put them on.
snip

Why not emery wet and dry? Some thickish grade to remove the bad stuff
as opposed to polishing the disks? (I probably would not have minded
what paper I used but just trying to see what is in your mind).

Cheers
C.