just under a litre
Well, to be technical about this answer, ball bearings are NOT used on roller skates or skateboards. This technology went out in 1975. Since then, the 608 size precision bearing has been the standard. As for why this size was chosen: the 608 size, which has a 22mm outer circumference size, was the closest size to the existing cup size of the previous technology, which actually used ball bearings on the inner and outer axle holes in the wheels, along with cups and nuts to keep the bearings in place. That cup size was not standard, but was based on the size of the wheel itself. As for why bearings are used in the first place: precision bearings are by far the most technologically simple, effective way for any modern round wheel, gear, propeller, turbine, disk drive, or anything else you can think of, to spin.
Your question is very vague...is it how to remove bearings or how the replace bearings or how to size new bearings on an old worn shaft???? And what bearings??? There are several hundred bearings on a car...one kind of bearing on fishing reel...for or five bearings on a bicycle
no
The standard size of an L-shaped desk is 31" tall, 72" wide and 71" deep at the deepest. You can purchase most of them for under $600.
Yes this item should be able to easily fit under a standard size bed.
There is no standard size.
yes
What is the standard size of a sofa?
There is no standard size of a factory.
There is no standard window size.
I never use any pipe under 11/2"