it is an Australian type of bearing and is equivalent to abec9 bearings.
krunk k1's
For a kids push scooter, there are 2 bearings per wheel, 2 wheels per scooter. 4 bearings total. If you buy a pack of 8 for a skateboard, you will have 2 sets.
abec 7
ABEC 7s
yes
No Because It will damage your scooters back wheel it is also known to loosen bearings too
Yes, most bearings are the industrial standard of 8mm unless you have special longboard trucks, most notably Bear 1052's or 1045's or Bear Smokeys, these trucks run 10mm but are not very common. If you can take wheels off with the same wrench on both trucks, then they have the same size bearings.
bones, bones, bones, bones, abec
yeh
Bearings in a scooter are a great idea. A scooter without bearings will work. For a short time. Then the point where the stationary (none turning) part touches the turning part will begin to got hot from friction and bind or will wear away so round parts will be flattened. Then the scooter will stop working well. Then the scooter will stop working at all. Lubrication the area will make it last longer but the result will only be delayed. Properly designed and installed bearings between rotating and non-rotating parts are amazing things. They will roll between and with both parts reducing friction and wear so much that it can last years longer.
I don't think so but I could be wrong.. it depends what wheels you have. The important thing is that your wheels fit you scooter..
simply with a toothbrush, and you don't need to clean it to often.