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Is Metal Magura Backings As Good As Cnc Backings.


JaMmY

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ive got some metal magura pad backings and wondered if they were as good as or nearly as good as cnc pad backings.

I didn't know magura made metal backings. The only ones i was aware of were the plazzie ones, the heatsink cnc ones and the rimjam ones.

Chuck up some pics for us, i'm sure a fair few are quite intrigued.

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Anyway, you do realize that CNC backings are made of metal, and that "CNC" doesn't actually mean it's better?

Exactly. CNC'ing is just the name of the process used to cut the metal. For the sake of brake pads, I wouldn't worry much about whether it's CNC'ed or not.

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cut the material with a stanley knife then superglue it in with a vice.

and if it works- tell the world!

but i heard that the rimjam backings were serious cylinder destroyers...? that true?

Yes! snapped two of mine and one of my mates and he only had them on for no more than half an hour.

But some people are quite lucky with them.

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CNCed items do have a strength advantage over a cast item of the same shape.

When you cast an item then it's a major challenge to avoid microscopic bubbles occuring in the molten metal as it flows to fill the mould tool, and these voids equate to weaknesses in the material. Billet metal for CNCing is manufactured to be void free.

In this case, you have to take into account both different manufacturing processes and different geometries.

Steve

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lol why does every body think any thing with CNC after the name is better? CNC = computer numerical control

just mean that the milling cutter moves in a pre plotted route rather than being moved by hand, pretty simple really, good for mass prodution

Edited by dave33
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lol why does every body think any thing with CNC after the name is better? CNC = computer numerical control

just mean that the milling cutter moves in a pre plotted route rather than being moved by hand, pretty simple really, good for mass prodution

CNC machining means enhanced accuracy and repeatability compared to a hand machined version.

CNC machining may not be the cheapest choice for mass production (each item has a relatively long cycle time, many minutes compared to seconds for a moulded item), hence the common choice of die-casting (the initial tooling cost upfront can be shown to be a minimal part of the unit cost if considered across the life of this tool) followed by only CNCing the important features like threads and faces requiring a high surface finish and accuracy of position.

A 100% CNC machined item may not be necessary for all fabricated items, but for highly stressed components / high quality finish components, then it is desirable.

Steve

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When you cast an item then it's a major challenge to avoid microscopic bubbles occuring in the molten metal as it flows to fill the mould tool, and these voids equate to weaknesses in the material. Billet metal for CNCing is manufactured to be void free.

that's why cnc'd things are lighter....since you don't have to accomodate for voids in the material...

isn't TF just a mine of knowledge :P

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