Deep Groove Ball Bearing F-HC808544.KL For Spreader Rolls

Designation: F-HC808544.KL

Type: Hybrid deep groove ball bearings

Dimension: 220*270*24mm

Suffix of Hybrid Ball Bearings 

HC: Ceramic rolling elements

Weight: 2.5kg

Application: Spreader Rolls

Elements: Si3N4 Ceramic Balls

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.