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Radial Full Ceramic Bearings
Full ceramic, radial, deep groove, bearings are made entirely of ceramic material and are superior to common steel bearings in many ways. Ceramic is the perfect material for any application seeking to achieve higher RPM's, reduce overall weight or for extremely harsh environments where high temperatures and corrosive substances are present. Applications such as cryopumps, medical devices, semiconductors, machine tools, turbine flow meters, food processing equipment, robotics and optics. Ceramic materials commonly used for bearings are Silicon Nitride (Si3N4), Zirconia Oxide (ZrO2), Alumina Oxide (Al2O3) or Silicon Carbide (SiC.)
The Boca Bearing Company specialize in miniature, deep groove, radial full ceramic bearings down to as small as a 3mm ID. Because ceramic is a glass like surface it has an extremely low coefficient of friction and is ideal for applications seeking to reduce friction and heat. Ceramic balls require less lubricant and have a greater hardness than steel balls which will contribute to increased bearing life. Thermal properties are better than steel balls resulting in less heat generation at high speeds and bearing capable of handling extremely high temperatures. Full Ceramic bearings can have a retainer or full complement of balls, retainer materials used are PEEK and PTFE.
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Full ceramic bearings can continue to operate under extremely high temperatures and are capable of operating up to 1922° F. Ceramic is much lighter than steel and many bearings are 1/3 the weight of a comparable steel bearing. Full ceramic bearings are highly corrosion resistant and will stand up to most common acids, they will not corrode in exposure to water or salt water. And finally full ceramic bearings are non-conductive.
The purpose of a radial bearing is to reduce rotational friction and support loads. This is achieved by using two races to hold the balls and to spread the load through the balls. As the bearing race rotates it causes the balls to rotate. The ball provides for substantially less rolling resistance and coefficient of friction than if two flat surfaces were rotating.
Single-row, deep groove radial ball bearings are the most common bearing type, having a wide range of applications. Radial bearings are made with very high levels of precision and used in applications where rotational performance and low torque is necessary, but load is a secondary issue. Deep-groove bearings however do have higher load ratings for their size than shallow-groove ball bearings, but are also less tolerant of misalignment.
Ceramic hybrid ball bearings use ceramic balls. Ceramic balls weigh up to 40% less than steel balls, depending on size. This reduces centrifugal loading and skidding, so hybrid ceramic bearings can operate up to 50% faster than conventional bearings. This means that the outer race groove exerts less force inward against the ball as the bearing spins. This reduction in force reduces the friction and rolling resistance. The lighter ball allows the bearing to spin faster, and uses less energy to maintain its speed. Ceramic hybrid ball bearings use these ceramic balls in place of steel balls. They are constructed with steel inner and outer rings, but ceramic balls so they are known as hybrids.
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8 x 24 x 8$100.76
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9 x 26 x 8$100.76
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8 x 22 x 7$78.36
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13 x 32 x 10$190.37
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9 x 20 x 6$78.36
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SIC Series
LEARN MORESilicon carbide (SiC) bearings offer numerous advantages over other full ceramic bearings. They excel in high-temperature environments, boasting exceptional heat resistance. SiC bearings are extremely hard and wear-resistant, making them ideal for abrasive or high-stress conditions. Their low friction properties improve energy efficiency and may allow for self-lubrication. Furthermore, they are highly corrosion-resistant and dimensionally stable, making them suitable for precision applications.
However, SiC bearings can be relatively expensive and may have limited size and configuration options. Despite these drawbacks, their benefits include reduced maintenance, electrical insulating properties, and reduced weight. The choice between SiC bearings and other ceramic options should be based on the specific needs of the application and the trade-offs between their unique properties.
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Zirconia Oxide (ZrO2) Series
LEARN MOREZirconia is inert to corrosive materials, with the exception of hydrofloric acid and hot concentrated sulfuric acid. Zirconia is lighter than steel, non-magentic and has a maximum useful temperature of 400°C.
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Alumina Oxide Al203 Series
LEARN MOREAlumina Oxide (Al2O3) Ceramic is resistant to most corrive materials except for hydrochloric and hydroflouric acids or strong alkaline solutions. Alumina Oxide is non-porous, lighter than steel and, in ball form, harder than steel. Because ceramic balls are non-porous they are virtually frictionless and are capable of spinning faster than steel balls.
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Flanged Full Ceramic Series
LEARN MOREBearings with a flange on the outer ring simplify axial location. The housing for such bearings can consist of a through-hole of uniform diameter, but the entry face of the housing (which may be either the outer or inner face) must be machined truly normal to the hole axis.
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Mini Full Ceramic Series
LEARN MOREThe Boca Bearing Company continues to innovate and push the envelope in full ceramic bearing technology with the new extended line of LBT Mini Full Ceramic bearings. With standard and flanged sizes ranging from as small as 2mm ID to 15mm ID and 3/32in ID to 3/4in ID, the LBT Mini Full Ceramic bearing series are suitable for use in many specialty applications Ceramic is the perfect material for any application seeking to achieve higher RPM’s, reduce overall weight or for extremely harsh environments where high temperatures and corrosive substances are present. Applications such as cryopumps, medical devices, semiconductors, machine tools, turbine flow meters, food processing equipment, robotics and optics.
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Silcon Nitride (Si3N4) Series
LEARN MORESilicon Nitride (Si3N4) Ceramic Bearings are suitable for applications where high loads, high speeds and extreme temeratures are factors. Long life and the need for minimal lubrication make this material appropriate for extreme applications. Silicon Nitirde is non-porous, non-magentic, non corrosive and lighter than steel. In ball form, ceramic balls are also harder than steel and because ceramic balls are non-porous they are virtually frictionless. and capable of spinning faster than steel balls. Maximum useful temperature of Silicon Nitirde is 1922°F or 1050°C.