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Doris LMS Black 5 by LBSC

Help with Tender Brakes

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Alan McDade 124/08/2010 17:35:24
1 forum posts
I am building a 3-1/2 gauge Doris (LMS Black 5) and I am at the stage of putting the tender together.
 
I'm stuck on the tender brakes. What material do I use - Do I use metal with something else bonded onto the metal brake surface or what?
 
I had thought of tufnal or a hard nylon however I'm sure the experts out there will know exactly what to use.
 
Any advice gratefuly accepted.
 
Alan
Jeff Dayman25/08/2010 12:33:29
2356 forum posts
47 photos
Most scale loco brakes I've seen described use cast iron shoes, often supplied in a ring shape which is then cut into segments.
 
If you want to use non metallic linings, you could buy a set of inexpensive car brake shoes and cut the linings from the friction material on them. Wear dust masks if you do.
 
JD
David Clark 125/08/2010 15:00:49
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3357 forum posts
112 photos
10 articles
Hi There
I don't know if they still are but brake linings used to be Asbestos.
I found this out after turning Ferodo for disk pads.
Does anyone know for sure?
regards David
Mike25/08/2010 15:59:54
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713 forum posts
6 photos
I understand that legislation which became active in 2005 forbids the use of asbestos in brake pads and linings in the UK. This information is from a website for Rolls Royce and Bentley enthusiasts. This does not mean that there are not some of the old ones hanging about in peoples' garages.
However, looking at the black dust given off by the disc pads on my car, I still wouldn't like to inhale it. Suggest machining all brake materials calls for a good dust mask.
Andrew Johnston25/08/2010 16:31:58
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7061 forum posts
719 photos
I can confirm that UK car brake pads do not use asbestos any more. Most medium performance pads use a mix of iron, copper, steel and graphite to form the pad. The snag is that the pads tend to be harder than the old asbestos based ones and hence tend to wear the brake discs more quickly. I know this because I recently had to have changed both the pads and discs on the front wheels of my car at great expense. I asked lots of questions first, including demanding to have a look for myself before agreeing. Both pads and discs were well worn, so not much choice in the end.
 
Regards,
 
Andrew
 
KWIL25/08/2010 16:53:02
3681 forum posts
70 photos
Which is why modern alloy wheels do not last that long, the iron takes the paint/lacquer off when you clean them vigorously, the copper attacks the alloy as does the so called wheel cleaning fluids.  I no longer use the fluids and the wheels come off when they need to (which was always difficult before due to corrosion)
Nicholas Farr25/08/2010 23:10:04
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3988 forum posts
1799 photos
Hi, virtually all asbestos and even second hand asbestos was banned from use in the UK by 2000. It still exists in buildings and all sorts of places. It dose not have to be removed unless in is in a poor condition. A lot of the dangerous types of asbestos can only be removed by lienced firms, other types sould only be removed after you have had traning to do so. for more info go to www.direct.gov.uk and type asbestos in the search box at the top. I would not recomend using any asbestos even for private use. If any newly built models are put in the public domain anywhere that contain asbestos they are most likely to be illegal.
 Regards Nick
John Baguley26/08/2010 01:06:37
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517 forum posts
57 photos
As Jeff says, most brake blocks are cast iron. For your Doris, the tender brakes are really only intended for 'show' or as a parking brake, so the effectiveness of the braking material is not an issue. If you tried to use them as brakes when running, all that will happen is that the tender wheels will lock and just slide on the rails.
 
John
Ian S C27/08/2010 11:32:53
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7468 forum posts
230 photos
Hi, as the brakes do'nt do a great deal, the idea of Tufnal or plastic would sound good to me, less chance of wheel damage if for some reason the shoe dragged on the wheel(it proberbly cant). Ian S C

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