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bearing steel
we can ensure that the steel we source is tailored to the needs of our valued customers.
bearing steel line

Bearing steels can include a wide variety of compositions, each specialized in terms of the chosen or most economically favorable processing route of a particular bearing maker.

Bearing steel introduction

They have in common the need for careful steelmaking practices to maintain the steel cleanness necessary for longer bearing life. As the demands of the bearing application increase, the steels may be made by such premium practices as melting under vacuum to further avoid introducing nonmetallic inclusions into the steels.

Bearings for special, difficult service may be made from much more highly alloyed steels. Aerospace applications typically require both premium-melted steels as well as complex alloy compositions.

The future of bearing steels will be defined by the search for an “ideal” material which will combine improvements in surface hardness, fracture toughness, hardness retention at increased temperatures, and corrosion resistance.

Composition of bearing steel


Bearing steel Mechanical Property

Bulk modulus (typical for steel)140 GPa20300 ksi
Shear modulus (typical for steel)80 GPa11600 ksi
Elastic modulus190-210 GPa27557-30458 ksi
Poisson’s ratio0.27-0.300.27-0.30
Hardness, Brinell
Hardness, Knoop (converted from Rockwell C hardness)875875
Hardness, Rockwell C (quenched in oil from 150°C tempered)6262
Hardness, Rockwell C (quenched in water from 150°C tempered)6464
Hardness, Rockwell C (quenched in oil)6464
Hardness, Rockwell C (quenched in water)6666
Hardness, Vickers (converted from Rockwell C hardness)848848
Machinability (spheroidized annealed and cold drawn. Based on 100 machinability for AISI 1212 steel)4040

Specifications of Bearing steel

Product Name

RC hobby steel bearing MR105 MR105ZZ MR105-2RS 5x10 bearings

Model No





Chrome steel

Sealed Type

2RS rubber seals/ ZZ metal shields/Open


P0, P5, P6


C0, C2, C3, C4


10pcs/tube+White small box+Carton

Shipping Method

By air/by sea/by train

Applications of Bearing steel

Bearings are essential to manufacturing and are used in many different types of equipment and machinery. 

From basic industrial equipment to complex machinery, bearings reduce friction and make it possible to handle different types of loads. 

Therefore, the use of quality and reliable materials is vital to the bearing manufacturing process.

Different materials are used to produce various types of quality bearings and their many components. 

These materials undergo specific processes to achieve the desired properties, improving both bearing lifespan and performance.

our export country

We are a well known worldwide supply and export Bearing steel in following countries:,Italy, Philippines, France,Ireland, Portugal, Gambia, Thailand, Ukraine, United Kingdom, Netherlands, South Africa, Spain, Turkey, Libya, Romania, Puerto Rico, Azerbaijan, United Arab Emirates, Pakistan, Ghana, Slovakia, Germany, Saudi Arabia, Afghanistan, Bolivia, Switzerland, Bangladesh, Taiwan, Oman, Egypt, Greece, Norway, Singapore, Bulgaria, Estonia, Belgium, Yemen, Hong Kong, Ecuador, Sri Lanka, Nepal, Belarus, Finland, Gabon, Iran, Canada, Argentina, Lebanon.

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