CEROBEAR Custom Bearings

Features of CEROBEAR Custom Bearings

There is no standard catalog for CEROBEAR custom bearings.
This is because we understand that the unique challenges and requirements of each customer cannot be fully addressed by an off-the-shelf product catalog.
CEROBEAR does not ask you to "choose" from fixed options; instead, we "co-create" a solution that fits your needs 100%. Please start by telling us your specific requirements —what kind of bearing you need. We will propose the optimal design from scratch.

Extensive Customization Capabilities

CEROBEAR excels in manufacturing bearings for extremely demanding applications by combining advanced materials with sophisticated designs. We are capable of producing a variety of ball bearings (thrust, angular contact, deep groove, thin-section, double-row, multi-row) and a variety of roller bearings (cylindrical, tapered, needle, spherical, hourglass, and with outer ring gears).
Beyond internal specifications like internal clearance, contact angle, tolerance, rigidity, and seals, we can customize the product as a complete "bearing system." This includes features like screws, springs, flanges, anti-rotation mechanisms, lubrication ports, and even integrated outer ring gears or inner rings, taking into account assembly and the function of peripheral components.

Precision Manufacturing Technology for Ceramic Materials
(Rolling Elements, Inner/Outer Rings)

We can design and manufacture not only rolling elements in any shape—balls, cylinders, spheres, tapered forms—but also inner and outer rings to meet your specific requirements. Specialized finishing processing ensures maximum ceramic stability for high quality and extended product life.The high quality of these ceramic parts is strictly guaranteed through in-house non-destructive testing methods.

Ideal for Challenging Environments & Special Requirements

• 

  Environments

  • ・Vacuum
  • ・Corrosive
  • ・Hygienic Environment
  • ・High Tempetarure
  • ・Cryogenic
• 

  Performance
  and
  Reliability

  • ・Extended Service Life
  • ・High-Speed & High-Load Rotation
  • ・Low/Dry Lubrication
  • ・Low Torque
  • ・Maintenace Less
  • ・Media Lubrication
• 

  Special Shapes

  • ・Non magnetic
  • ・Specialized Shapes & Unique Dimensions
  • ・Thin Section
  • ・Electical Insulation
  • ・Saving space
  • ・Full ball
  • ・Full roller

Main applications

You can scroll >>

flight Aerospace directions_car Motorsport ac_unit Cryogenic
industry local_fire_department Energy and
Oil & Gas memory Semiconductor
manufacturing equipment shield Auxiliary
bearings

Aerospace

CEROBEAR is deeply committed to the development and growth of the aerospace sector. We actively supply hybrid bearings for a wide range of applications, including aircraft and helicopter gearboxes, transmissions, engines, Auxiliary Power Units (APUs), space rocket turbopumps, and air management systems.
Our aerospace legacy began in the early 2000s for the first time when our ceramic cylindrical roller bearings were integrated into the liquid hydrogen pumps of the US Space Shuttle main engines. These ceramic rollers performed approximately 40 missions without a single failure. Operating in extreme conditions where liquid hydrogen served as the only lubricant, they achieved stable performance at speeds of 36,200 rpm and ultra-low temperatures of -250°C (-423°F).

Motorsport

As a proven supplier with over 20 years of experience, we provide high-performance, highly customized hybrid bearings for critical racing car applications, including gearboxes, transmissions, wheels, motor generator units, turbochargers, chassis, engines, and clutches.

Cryogenic industry

In cryogenic applications, rolling bearings frequently operate in extremely harsh environments defined by temperatures well below 0°C poor lubrication. At temperatures near absolute zero(-273.15°C), oil or grease lubrication becomes impossible, making conventional steel bearings prone to short service life, early equipment failure, and unplanned machine downtime.
CEROBEAR not only pays meticulous attention to all bearing materials but also adapts the internal and external geometries of the bearing to suit cryogenic environments. From the design stage, our engineers consider the varying thermal properties of all materials—including the shaft and housing—and propose the optimal radial clearance and contact angle at operating temperatures to ensure seamless integration with mating components. These features maximize load capacity and extend bearing life. Our solutions are widely utilized in turbo expanders, liquid turbines, chillers, and pumps for various liquefied gases, such as LNG, LN2, LO2, LH2, LHe2, and NH3.

Energy and Oil & Gas

In the oil and gas industry, our bearings are used in aero-derivative gas turbines for power generation, leveraging our long-standing track record of supplying the aerospace industry.
CEROBEAR’s hybrid and all-ceramic ball and roller bearings maximize the service life and reliability of all rotating systems in the oil and gas industry, improving operational performance.The more severe the operating conditions—such as extreme temperatures, high loads, high speeds, contamination, corrosion, or poor lubrication—the more CEROBEAR bearings outperform the competition. Combining ceramic rolling elements with high-nitrogen steel, they deliver exceptional rolling contact fatigue resistance and outstanding corrosion resistance, ensuring significantly extended service life.
Over the years, we have accumulated extensive manufacturing expertise and technology in specialized steels. CEROBEAR bearings flexibly support everything from build-to-print manufacturing based on customer drawings to original design proposals, providing comprehensive bearing solutions for power generation and energy storage systems.

Semiconductor manufacturing equipment

Semiconductor manufacturing equipment requires both "ultimate cleanliness" and "resistance to extreme environments". In processes where miniaturization is accelerating, CEROBEAR's ceramic and hybrid bearings achieve high reliability and stable operation that conventional metal bearings cannot reach. We reliably resolve for rotating mechanism challenges in lithography, heat treatment, etching, vacuum coating, and both cryogenic and high-temperature environments.
In high-vacuum environments such as thin-film deposition, evaporation, and sputtering, our specialized materials minimize outgassing. Lubricant-free (dry) operation can be proposed in some cases, where the suppression of particle generation leads to an improvement in product yield.
Furthermore, the use of ceramics and highly corrosion-resistant steels prevents degradation caused by strong acids, strong alkalis, and corrosive gases. For environments requiring non-magnetic or insulating properties, our all-ceramic bearings are the ideal choices.
Additionally, for thin-section bearings, our unique design maximizes ball diameter to provide high-rigidity solutions that surpasses conventional products. By dramatically extending maintenance cycles and enabling high-speed, high-precision processing, we maximize the overall performance of your equipment.

Auxiliary bearings

Active Magnetic Bearings (AMB) utilize the principle of magnetic levitation to support shafts without contact or wear, making them indispensable for high-speed rotating systems. These bearings are employed in a wide variety of applications, ranging from large and small turbo compressors to turbomolecular pumps, aeration blowers, gas expanders, and machine tool spindles. CEROBEAR provides optimal auxiliary bearing (touchdown bearing) solutions for all of these applications.
CEROBEAR’s touchdown bearings have proven their superior performance at extremely high speed factors (n x dm) of up to 3.6 million mm/min. Due to their unique, customized geometries, they control shafts even under exceptionally high radial and axial shock loads. We can also offer "superduplex" designs—featuring a one-piece, double-row inner ring combined with an axially split outer race—which ensure uniform load distribution across both ball rows to reduce Hertzian stress at the rolling contact. CEROBEAR auxiliary bearings serve as the ultimate safeguard for system integrity under harsh conditions. We propose the optimal design tailored to your specific application requirements.

Available Specifications

Sizes & Materials

※We offer a wide range of rigid materials tailored to various operating environments.

Ceramic Materials (Rolling Elements and Bearing Rings)

Ceramics are lightweight, highly resistant to heat and corrosion, and can perform reliably even under marginal lubrication.

• ・Silicon Nitride (Si3N4)：
  The most common ceramic material. It features high precision and high rigidity,
  making it suitable for high-speed rotation.
• ・Zirconia (ZrO2)：
  Offers extremely high corrosion resistance. Its coefficient of thermal expansion is close to that of steel,
  providing a distinct advantage in environments with temperature fluctuations.

Metal Materials (primarily for hybrid bearing rings)

These are specialized alloy steels designed for use in combination with ceramic balls.

• ・High-Nitrogen Steel (HNS)(e.g., Cronidur 30 / XD15NW)：
  One of CEROBEAR’s core strengths.
  Compared to conventional stainless steels like AISI440C, it boasts overwhelming corrosion resistance and fatigue strength.
• ・Aerospace Specialty Steels (e.g., M50/ M50 NiL / BG42 / CSS-42L) ：
  We offer aerospace-grade materials, such as M50,designed to withstand the ultra-high temperatures and heavy-load environments found in jet engines and transmissions.
• ・Standard Steels：
  Options such as 100Cr6 (bearing steel) and SUS440C (stainless steel) are also available depending on your specific application.

Cage Material

The cage is the key to maximizing bearing performance. CEROBEAR proposes cages designed to withstand harsh temperature fluctuations and vacuum conditions. We deliver high-value superior value by meeting extended service life, lubrication efficiency, low torque, and weight reduction.

ex）High-Performance Polymers

Lightweight and highly lubricious, polymer cages provide excellent rotational performance with low heat generation. They are widely adopted across various fields, such as in environments requiring corrosion resistance.
We also offer specialized treatments to enhance strength and select the optimal material tailored to operating conditions.

ex）Metals and Composites

We supply metal cages made of steel, bronze, and brass for environments demanding heat resistance and high strength.
Compared to polymers, these materials offer better machinability, allowing for the design and manufacture of complex geometries.

Manufacturable bearing types

Quality Management System

To provide products that require absolute reliability under extreme conditions, CEROBEAR has established a rigorous management system based on international quality, environmental, and safety standards.

We hold and comply with EN 9100, the highest quality standard in the aerospace industry, as well as ISO 9001 for international quality management, ISO 14001 for environmental protection, BS OHSAS 18001 for occupational health and safety, and ISO 50001 for energy management. Through thorough process control based on these diverse certifications, we guarantee the highest level of solutions—from spacecraft to industrial equipment—balancing safety with sustainability.

Ready to solve your challenges with our CEROBEAR's engineers?

Do you face design challenges involving extreme environments that existing bearings cannot handle, or are you seeking even higher precision and longer service life?
Based on the expertise we have cultivated at the forefront of the aerospace, F1, and specialized industries, CEROBEAR provides tailor-made proposals for the optimal materials and geometries to meet your specific needs.
We also welcome joint development from the initial design phase. Contact us to discuss your challenges.

About CEROBEAR GmbH

Founded in 1989 and becoming a member of the MinebeaMitsumi Group in 2013, CEROBEAR is a global leader in high-performance bearing technology. For decades, the company has engineered, manufactured, and marketed advanced all-ceramic and hybrid bearings utilizing cutting-edge materials and premium steel.
CEROBEAR supplies specialized bearing solutions to demanding sectors across Europe and the US, including aerospace, medical devices, semiconductor manufacturing equipment, machine tools, food packaging, and motorsports. These bearings are precision-engineered to meet the highest quality standards, delivering exceptional performance under extreme conditions such as high speeds, low friction, high corrosion resistance, and challenging environments like high temperatures or dry operation.

CEROBEAR GmbH

Kaiserstr. 100, 52134 Herzogenrath, Germany

CEROBEAR Product Website（English / German）