Choosing correct type of bearing for its applications is important like that material of the bearing plays a vital role in bearing performance and also life of the bearings is also based on the materials like types, materials also based on its application
Here are the properties of the material should have:
Compressive Strength: pressure that is acting on bearing is greater than the average pressure.
Fatigue strength: to avoid fatigue failure, the bearing material should have sufficient endurance strength.
Bond ability: ability of the material to form strong bond with other materials.
Corrosion resistance: In the applications where there is high working temperature, this temperature oxidizes the lubricating oil and forms the corrosive acids. This formed acid attacks on bearing material and corrodes it.
Conformability: It is the ability of the bearing material to yield and adopt its shape to that of the journal.
Embed ability: The dirt or dust particles in the lubricating oil may cause the jamming in the clearance space.
Thermal Conductivity: For the rapid dissipation of the heat, bearing material should have high thermal conductivity.
Cost and Availability: The bearing material should have low cost and also it should be easily available in market for its production.
Previously we saw about strengthens of the materials have to be want. Next we will see about the individual material type unique strength.
Babbitt (white metals) : The original name for tin-antimony-copper white alloys used for machinery bearings it is light weighted bearings and also it have hardness so it is used to high speed applications.
Bronze: Bronze was especially suitable for use in boat and ship fittings prior to the wide employment of stainless steel owing to its combination of toughness and resistance to salt water corrosion
Copper-lead alloy: The lead in the copper alloy also gives some degree of embed ability. Lead-free bearings are widely used in the production car world.
Cast iron: Monolithic ferrous bearings are made of gray cast iron, pressed and sintered iron and steel powder, and many wrought steels. Most cast-iron bearings are made of gray iron because it combines strength with the lubricity of graphitic carbon.
Silver: Silver-coated bearings are used extensively in heavy-duty equipment and high-tech applications in which superior resistance to corrosion and fatigue is needed.
Aluminum alloy: Aluminum bearing alloys have wear resistance, high load-carrying capacity, fatigue strength, thermal conductivity, and excellent corrosion resistance, and low cost
Sintered metal or porous metal: It gives best mechanical strength, grade or porosity for oil retention and self lubrication in its finished form.
Non-metallic materials: Nonmetallic materials offer self-lubricating properties, high-temperature stability, solvent resistance, or low cost. The most common of these are carbon graphite, wood, rubber, and ceramics.
So choosing material for bearing must be clear in which type of application want to be using these bearings that only help to identify the correct bearings.
Here are the properties of the material should have:
Compressive Strength: pressure that is acting on bearing is greater than the average pressure.
Fatigue strength: to avoid fatigue failure, the bearing material should have sufficient endurance strength.
Bond ability: ability of the material to form strong bond with other materials.
Corrosion resistance: In the applications where there is high working temperature, this temperature oxidizes the lubricating oil and forms the corrosive acids. This formed acid attacks on bearing material and corrodes it.
Conformability: It is the ability of the bearing material to yield and adopt its shape to that of the journal.
Embed ability: The dirt or dust particles in the lubricating oil may cause the jamming in the clearance space.
Thermal Conductivity: For the rapid dissipation of the heat, bearing material should have high thermal conductivity.
Cost and Availability: The bearing material should have low cost and also it should be easily available in market for its production.
Previously we saw about strengthens of the materials have to be want. Next we will see about the individual material type unique strength.
Babbitt (white metals) : The original name for tin-antimony-copper white alloys used for machinery bearings it is light weighted bearings and also it have hardness so it is used to high speed applications.
Bronze: Bronze was especially suitable for use in boat and ship fittings prior to the wide employment of stainless steel owing to its combination of toughness and resistance to salt water corrosion
Copper-lead alloy: The lead in the copper alloy also gives some degree of embed ability. Lead-free bearings are widely used in the production car world.
Cast iron: Monolithic ferrous bearings are made of gray cast iron, pressed and sintered iron and steel powder, and many wrought steels. Most cast-iron bearings are made of gray iron because it combines strength with the lubricity of graphitic carbon.
Silver: Silver-coated bearings are used extensively in heavy-duty equipment and high-tech applications in which superior resistance to corrosion and fatigue is needed.
Aluminum alloy: Aluminum bearing alloys have wear resistance, high load-carrying capacity, fatigue strength, thermal conductivity, and excellent corrosion resistance, and low cost
Sintered metal or porous metal: It gives best mechanical strength, grade or porosity for oil retention and self lubrication in its finished form.
Non-metallic materials: Nonmetallic materials offer self-lubricating properties, high-temperature stability, solvent resistance, or low cost. The most common of these are carbon graphite, wood, rubber, and ceramics.
So choosing material for bearing must be clear in which type of application want to be using these bearings that only help to identify the correct bearings.
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