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 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.
• 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.
Designation: F-HC808547.KL
Type: Hybrid deep groove ball bearings
Dimension: 280*350*33mm
Suffix of Hybrid Ball Bearings
HC: Ceramic rolling elements
Weight: 5.9kg
Application: Spreader Rolls
Elements: Ceramic Balls Silicon Nitride
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 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.
• 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.
