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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.
What else can I help you with?
Why are bearings used in bicycles?
To reduce unwanted friction.
Why do turbochargers not use normal ball bearings?
Turbochargers turn too fast for ball bearings. Sleeve bearings are typically used in this application.
Why funnel is used for dropping the ball bearings?
Why funnel is used for dropping the ball bearing
What is a metal marble steelies used for?
Ball bearings
What are the two types of bearings used in motors?
ball type
What are ceramic ball bearings used for?
Ceramic ball bearings are used for reducing frictional rotation, and to support radial and axial loads. It helps any application looking to have higher RPM.
What is the difference between a ball point pen and a roller pen?
Ball & Roller Bearings both belongs to the category of radial contact bearings.In case of ball bearings spherical balls are used however in case of roller bearings cylindrical rollers are used.due to balls used in ball bearings there is a point contact is made whether it is line contact in roller.
What is the standard size range for ball bearings used in industrial machinery?
The standard size range for ball bearings used in industrial machinery typically falls between 1mm to 200mm in diameter.
Where can ball bearings be found?
If you need replacements, they can be bought at a hardware store. If you mean applications/uses ... bicycle wheels have ball bearings. Lots of rolling objects that move around an axle have either needle bearings or ball bearings or roller bearings.
What does Faulty ball bearings cause?
Faulty ball bearings lead to bearing failure.
When are ball bearings used?
Generally, a ball bearing is used when speed is important; a roller bearing is used more often when load is most important.
How are ball bearings polished?
Ball bearings are polished by using an abrasive cloth. Before the bearings can be polished, the polishing paste must first be applied to the ball bearing.
