What does the number mean on bearing for skateboard. i e ABEC 5?

Question

What does the number mean on bearing for skateboard. i e ABEC 5?

Answer 1

Not much. They measure the precision for high speed machinery, but don't make a difference unless you get up into 300 mph.

Answer 2

The ABEC scale is a system for rating the manufacturing tolerances of precision bearings.

Tolerance is the amount of variation from an absolute exact measurement that is permitted during the manufacturing process.

Does abec 7 go faster than abec 5 no.. unless you are going 300mph then tolerance and speed dont really do anything.

Answer 3

i believe it is just the model number. ABEC 5 is in the middle for preformance.