How do you make a skate board?

Answer 1

The ABEC scale is a system used throughout the manufacturing industry for rating the manufacturing tolerances of precision bearings, developed by the Annular Bearing Engineering Committee (ABEC) of the American Bearing Manufacturers Association (ABMA). Bearings are rated using an odd number between 1 and 9. The higher the number, the greater the manufactured precision of the bearing. Bearings manufactured within tighter tolerance ranges provide greater accuracy of shaft rotation and contribute to higher speed capability. However, the ABEC rating does not specify many other critical factors, such as smoothness of the rolling contact surfaces, ball precision, and material quality[1].

But yea keep em cleen and dry and lubricated and if they are really nice you should take them apart and cleen them one in a while.