The measurement shows the beat of the brake disc, but one should be aware that the disc is attached to the hub, the surface of which is not perfectly even and also influences the measurement. Therefore, ATE always recommends HUB beating to have a maximum 0.02 mm (acceptable) and then a shield, the beating of which can not exceed 0.06 mm, so that the shield can be mounted, without fear that we will have a problem with the beating and a perceptible vibration of the brake pedal.
See how to check the beating of the hub itself using a dial indicator:
• Jak używać czujnik zeg...
In order to measure the shield itself, it would be necessary to have an ideal rotational surface, which is equal to 0.00 mm, but it is difficult to obtain such a surface in the workshop, so it is assumed that the hub beating at the edges is to be within 0.02 mm and the target with the hub 0.06 mm. If we want to reduce the beating, we can replace the hub with a new one or roll the turner's sand, if possible, that its surface is maximally equal (it will never be perfect).
If, however, the target value of the disc is within 0.06 mm of the runout, then we assemble and do not bother about anything.
Негізгі бет Ғылым және технология Measuring the shock of the brake disc with a dial indicator - read the description under the film
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