In standard deep groove ball bearings with steel balls, the combination of materials (steel/steel – high adhesion) enhances wear in the event of lubricant film breakdowns as a result of slippage, significantly reducing the life of the bearings.
In order to achieve a satisfactory bearing life even in the difficult operating conditions prevailing in the high-speed range, with a risk of slippage, hybrid deep groove ball bearings (rolling bearing steel rings, ceramic balls) are used.
To reduce the revolving masses (ball-cage assembly), only half the (even) number of balls is provided. This means that a higher load acts on each ceramic ball, reducing the risk of slippage.
Tribological properties of ceramic balls
• Ceramic balls are less negatively affected by lubricating film breakdowns and starved lubrication conditions than steel balls as the elements in rolling contact are significantly less susceptible to adhesive wear.
• The smaller mass of the ceramic balls results in slighter gravitational forces of the ball-cage assembly.
• In applications where there is a risk of passage of electric current, the ceramic balls act like insulators.
• The modulus of elasticity of silicon nitride is ca. 1,5 times as high as that of rolling bearing steel.
As a result, ceramic balls have a smaller contact area. Less heat is generated in the bearings, and the grease life is extended.
These are the defining features of our hybrid bearings
• Efficient protection against current passage – ceramic (silicon nitride) rolling elements have an insulating effect due to their high electrical resistance and prevent electrical erosion.
• Designed for higher speeds – the ceramic rolling elements have a lower density and exhibit reduced friction, enabling up to 20% higher limiting speeds than those achievable with standard bearings.
• Resistant, even in cases of inadequate lubrication – lower operating temperatures and reduced friction double the grease service life and lead to a reduction in product-specific life cycle costs of up to 20% compared with bearings containing steel rolling elements.
• Particularly wear-resistant – good emergency running characteristics enabled by low adhesion and low friction protect the hybrid bearings against adhesive wear in cases of inadequate lubrication or dry running. The bearings also
exhibit high levels of wear resistance in the presence of low loads and under slippage conditions.
• Protecting effect on the environment and climate – CO2 emissions in the application are reduced as a result of the reduced friction and lower weight of the hybrid bearings.
What is Hybrid Bearings and Why Hybrid bearings?
Hybrid angular contact ball bearings (designation suffix HC) have rings made of bearing steel and rolling elements made of bearing grade silicon nitride (ceramic). As ceramic balls are lighter and have a higher modulus of elasticity and lower coefficient of thermal expansion than steel balls, hybrid bearings can provide the following advantages:
• higher degree of rigidity
• higher speed capability
• reduced centrifugal and inertial forces within the bearing
• minimized stress at the outer ring rolling contacts at high speeds
• reduced frictional heat
• less energy consumption
• extended bearing and grease service life
• less prone to skid smearing damage and cage damage when subject to frequent rapid starts and stops
• less sensitive to temperature differences within the bearing
• more accurate preload/clearance control
Designation: F-HC808546.KL
Type: Hybrid deep groove ball bearings
Dimension: 260*320*28mm
Suffix of Hybrid Ball Bearings
HC: Ceramic rolling elements
Weight: 4kg
Application: Spreader Rolls
Elements: Silicon Nitride Balls (Si3N4)
In standard deep groove ball bearings with steel balls, the combination of materials (steel/steel – high adhesion) enhances wear in the event of lubricant film breakdowns as a result of slippage, significantly reducing the life of the bearings.
In order to achieve a satisfactory bearing life even in the difficult operating conditions prevailing in the high-speed range, with a risk of slippage, hybrid deep groove ball bearings (rolling bearing steel rings, ceramic balls) are used.
To reduce the revolving masses (ball-cage assembly), only half the (even) number of balls is provided. This means that a higher load acts on each ceramic ball, reducing the risk of slippage.
Tribological properties of ceramic balls
• Ceramic balls are less negatively affected by lubricating film breakdowns and starved lubrication conditions than steel balls as the elements in rolling contact are significantly less susceptible to adhesive wear.
• The smaller mass of the ceramic balls results in slighter gravitational forces of the ball-cage assembly.
• In applications where there is a risk of passage of electric current, the ceramic balls act like insulators.
• The modulus of elasticity of silicon nitride is ca. 1,5 times as high as that of rolling bearing steel.
As a result, ceramic balls have a smaller contact area. Less heat is generated in the bearings, and the grease life is extended.
These are the defining features of our hybrid bearings
• Efficient protection against current passage – ceramic (silicon nitride) rolling elements have an insulating effect due to their high electrical resistance and prevent electrical erosion.
• Designed for higher speeds – the ceramic rolling elements have a lower density and exhibit reduced friction, enabling up to 20% higher limiting speeds than those achievable with standard bearings.
• Resistant, even in cases of inadequate lubrication – lower operating temperatures and reduced friction double the grease service life and lead to a reduction in product-specific life cycle costs of up to 20% compared with bearings containing steel rolling elements.
• Particularly wear-resistant – good emergency running characteristics enabled by low adhesion and low friction protect the hybrid bearings against adhesive wear in cases of inadequate lubrication or dry running. The bearings also
exhibit high levels of wear resistance in the presence of low loads and under slippage conditions.
• Protecting effect on the environment and climate – CO2 emissions in the application are reduced as a result of the reduced friction and lower weight of the hybrid bearings.
What is Hybrid Bearings and Why Hybrid bearings?
Hybrid angular contact ball bearings (designation suffix HC) have rings made of bearing steel and rolling elements made of bearing grade silicon nitride (ceramic). As ceramic balls are lighter and have a higher modulus of elasticity and lower coefficient of thermal expansion than steel balls, hybrid bearings can provide the following advantages:
• higher degree of rigidity
• higher speed capability
• reduced centrifugal and inertial forces within the bearing
• minimized stress at the outer ring rolling contacts at high speeds
• reduced frictional heat
• less energy consumption
• extended bearing and grease service life
• less prone to skid smearing damage and cage damage when subject to frequent rapid starts and stops
• less sensitive to temperature differences within the bearing
