That'd be rare. Ball bearings are far more common although I believe some pedals come with roller bearings.
there are many types of bearings .... 1)ball bearing 2)roller bearing 3)ball thrust bearing 4)roller thrust bearing & 5)tapered roller thrust..
NAICS 332991 applies to Ball and Roller Bearing Manufacturing.
anti-friction bearing
Changzhou Zhihua Bearings Co., Ltd. is professional axial needle roller bearing manufacturer. They specialized in this field for many years. if you want to buy best axial needle roller bearing, the company will be the best choice. They will be the best axial needle roller bearing supplier!
roller thrust bearing
1 rollers 2 bearing race
Roller bearing
Because in most cases they are a tapered roller bearing.
needle roller bearing can be applied in numerous places. They can be widely used in the machinery such as the agricultural machinery, industrial sewing machine, the construction tools and the material handling equipment. Additionally, they are also commonly applied in the transportation vehicles such as the cars, buses, electric bicycle and the aircrafts. The needle roller bearings are also very helpful in some other places which we are not very familiar with. For example, Hydraulic pumps, sheave blocks and hoist drum shaft. wish this can help you!
It is not known who specifically invented the roller ball bearing. There are examples of their use by the ancient Egyptians. However, it is thought that they may have been invented before the wheel.
CZH bearings? did you mean Changzhou Zhihua Bearings Co., Ltd.? Changzhou Zhihua Bearings Co., Ltd. is a professional needle roller bering manufacturer. they specialized in needle roller bearing for many years. if you are looking for a best needle roller bearing supplier, the company will be your best choice.
AnswerYou will have to do some research. number of manufacturers and their production levels. example: Timken Bearing: produced 2.5 billion ball bearings in 1998. : Stats are their are 80%-90% still in service and those not are in junk yards.You have a lot of work ahead of you if you really need to know this answer.It depends on bearing qualities the manufacturing of bearings depends on demand. the different varieties are-Taper Roller Bearings, Deep Groove Ball Bearings, Cylindrical Roller Bearings, Spherical Roller Bearings, Spherical Thrust Bearings, Clutch Release Bearings, Needle Roller Bearing, Self Aligning Ball Bearings, Angular Contact and Double Row Bearings, King Pin Bearings, UCP Pillow Block, Water Pump Bearing, Ball Bearing Manufacturers, Metal Bearing exporters, Roller Bearing, Needle Bearings, Automotive, Roller High Precision Manufacturers, THRUST BALL BEARING, Automobile Bearing, Thrust Bearing, Roller Bearing Cylindrical Manufacturers, Needle Bearing Cages Manufacturers, Engine Bearings Manufacturers, Elevator Part Bearing Hanger ManufacturersVisit Us At http://www.arb-bearings.com