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General Chat (Vincent Related)
Oversize drum brakes as per MPH 712?
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<blockquote data-quote="timetraveller" data-source="post: 4397" data-attributes="member: 456"><p>I have a very peripheral involvement in this project and the parts are made by the same people who machine the parts I get made for astronomy and other matters. The drums, both 7" and 8", are machined from solid cast iron billet. The bake plates, both 7" and 8", are milled from solid ali billet. The 8" shoes are new castings and are designed in such a way that they can be set up as either single leading shoe or twin leading shoe if that becomes necessary. Brake linings are both glued and rivetted onto the shoes. Some of the prototype brake plates were left with a milled surface, some with a polished surface, which I thinks looks very nice but will be difficult to keep up to, and the centres can be painted black for those who want to keep the appearance something like the original.</p><p> </p><p>Incidentally for those who are concerned about the amount of lining area. You can get about 60% more lining area with a standard brake if the hollows at each end of the brake shoes are filled with weld and blended into the original profile. One can then fit about one and two thirds of normal brake linings. On the ex Cecil Mills bike with this set up and original electron brake plates, rear brake arms on the front and an Enfield twin cable handle bar lever with very heavy duty outer cables I have had the rear wheel in the air in a panic stop. A lady in a large 4 x 4 out hunting for dinner with her offsping pulled across in front of me without looking. Just dont ask me to do it again in cold blood! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite4" alt=":mad:" title="Mad :mad:" loading="lazy" data-shortname=":mad:" /></p></blockquote><p></p>
[QUOTE="timetraveller, post: 4397, member: 456"] I have a very peripheral involvement in this project and the parts are made by the same people who machine the parts I get made for astronomy and other matters. The drums, both 7" and 8", are machined from solid cast iron billet. The bake plates, both 7" and 8", are milled from solid ali billet. The 8" shoes are new castings and are designed in such a way that they can be set up as either single leading shoe or twin leading shoe if that becomes necessary. Brake linings are both glued and rivetted onto the shoes. Some of the prototype brake plates were left with a milled surface, some with a polished surface, which I thinks looks very nice but will be difficult to keep up to, and the centres can be painted black for those who want to keep the appearance something like the original. Incidentally for those who are concerned about the amount of lining area. You can get about 60% more lining area with a standard brake if the hollows at each end of the brake shoes are filled with weld and blended into the original profile. One can then fit about one and two thirds of normal brake linings. On the ex Cecil Mills bike with this set up and original electron brake plates, rear brake arms on the front and an Enfield twin cable handle bar lever with very heavy duty outer cables I have had the rear wheel in the air in a panic stop. A lady in a large 4 x 4 out hunting for dinner with her offsping pulled across in front of me without looking. Just dont ask me to do it again in cold blood! :mad: [/QUOTE]
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General Chat (Vincent Related)
Oversize drum brakes as per MPH 712?
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