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Dangerous consumables: what is the difference between fake brake discs and pads from the original (part 2)

Now let’s move on to the drives

We have only two of them: the original Hyundai-Kia with the number 517120U000 and the Miles drive with the number K001254. Such wheels are on Hyundai Solaris and Kia Rio.
Nothing new can be said about the Miles packaging: everything is more or less decent and tidy. With Kia, the situation is different. Everything is fine with the box: a lot of cardboard, well closed, the disc does not hang inside, everything is compactly packed. But there is no printing at all, there is only a label.
Inside, the situation is similar: Miles has instructions, Kia does not. Both manufacturers pack the discs in polyethylene and treat them with grease. But Miles has too much of it, so the bag is stained in oil, even outside. Kia has the best lubrication, but the yellow polyethylene of the original part is much denser and clean from the outside.
As you know, packaging is far from as important as what lies inside. And here surprises begin.

Compare how the original and non-original ventilated brake disc looks from the end. Light disk – Miles, dark – Kia.
Both discs have a slightly thicker part on the hub side. But the analogue is noticeably thicker. I think there is nothing wrong with that, but measuring with a vernier caliper revealed a very interesting feature: the analog thickness of the disc at different points of measurement is different. That is, this “feature” is available here, which leads to a beating of the disk. If the thickness of one side of the original is 6.5 mm, the other is 6.7 mm, and the entire disc is 22.0 mm along the entire circumference, then the analogue has a different situation. The thickness of one side ranges from 6.9 to 7.3 mm, the thickness of the other is everywhere 5.9 mm (somehow it does not look like the original at all, right?). And the thickness of the entire disk is scattered from 22.1 to 22.4 mm. A spread of thickness of 0.3 mm is a lot. With such discs, you can safely go to the groove, and it will not be superfluous. On the wheel balancing, this difference will hardly be noticeable, but on braking it is quite likely. And this will affect the resource of the pads, and in an emergency – and the adequacy of the ABS.

The second disadvantage of the analogue is poor-quality processing of the landing hole. It is uneven to the touch and unlike the hole in the Kia disc.
If on the original Kia disk the chamfer is shot exceptionally smoothly, and the surface is then processed, then on Miles it seems to have been bitten with teeth.

Such negligence in manufacturing, I think, will not interfere with the installation of the disk. But a noticeable simplification of the technology does not go well for the disk.

* * *
Brakes are not the kind of system you can save on. Especially in the case of the “Koreans” who were not caught in the low resource of brake mechanisms. A slight gain in the cost of these parts will affect the resource of other mechanisms (for example, calipers, and in the case of a curved disk, also the resource of wheel bearings). So do not forget that the avaricious pays twice, and all this savings on brakes in installments will someday require its interest. Good if money.

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