Ceramic
Bearings

Ceramic bearings are used to reduce failure rates in industrial systems exposed to heat, wear, and chemical environments.

Sintertechnik improves bearing performance through material selection and application-specific bearing design.

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The Problem

Why Bearing Failures Occur in
Industrial Systems

Up to 40% of industrial machinery breakdowns are linked to bearing issues, often caused by two avoidable mistakes:

Incorrect material selection

Use of standard catalogue bearings in non-standard conditions

This results in increased wear, reduced service life, and unplanned system downtime.

Applications

Industries

In aerospace, every component has to perform under extreme conditions: high speeds, vacuum, and fast-changing temperatures, with no room for error.

Our ceramic bearings are engineered for exactly these challenges. They are lightweight, so they handle high speeds with less strain. They maintain precision under rapid thermal changes and perform reliably in vacuum conditions, where standard steel bearings often fail.

This is why our high-performance ceramic bearings are trusted in zero-gravity flight testing and have even been used in the first wheeled vehicle to operate on Mars.

Industrial machinery is expected to operate continuously with minimal downtime. Standard steel bearings often wear out faster under heavy loads or inconsistent lubrication, leading to costly production stops.

Turbo pumps operate at extremely high speeds, often with limited lubrication. Standard steel bearings quickly generate heat and wear under these stresses.

Our ceramic bearings are designed for high-speed, low-lubtrication environments. Their low weight and excellent dry-running properties reduce heat generation and wear, enabling higher speeds and longer operating life.

In the chemical industry, components are continuously exposed to aggressive media such as acids and alkalis. Steel bearings are highly susceptible to corrosion in these environments.

Our ceramic materials, including silicon nitride and zirconium oxide, offer outstanding chemical resistance. They maintain strength and precision even under continuous exposure to corrosive substances. In many cases, the process fluid itself can act as a lubricant, eliminating the need for additional lubrication systems.

Metalworking processes involve very high temperatures where lubricants degrade and steel bearings lose performance.

Our ceramic bearings are designed to handle this heat. They maintain their strength and precision at temperatures up to 1,000°C and beyond, so your equipment keeps running smoothly even in the most thermally demanding parts of your process.

Pharmaceutical production demands strict hygiene standards. Even a small trace of lubricant or wear particles can compromise entire batches.

Our full ceramic bearings operate dry or with minimal lubrication, are chemically inert, and do not release metallic particles. This makes them ideal for reactors, dosing systems, and cleanroom production environments.

Medical devices require non-magnetic, electrically insulating, and contamination-free components, especially in imaging systems and patient-facing equipment.

Our ceramic bearings meet all of these requirements naturally. They are non-magnetic, electrically insulating, and manufactured to the strict cleanliness standards medical applications need, making them a dependable choice for precision medical devices and laboratory systems.

Food and beverage production requires frequent cleaning and strict hygiene compliance. Standard steel bearings can corrode or trap contaminants under these conditions.

Our ceramic bearings resist corrosion from cleaning agents and moisture. They operate without oil-based lubrication, reducing contamination risk, and withstand repeated washdown cycles, supporting both hygiene and long-term equipment performance.

Measuring and calibration systems depend on absolute stability. Even minimal thermal expansion or bearing play can throw off a reading.

Our ceramic bearings expand less than steel when temperatures change, and they maintain tighter tolerances over time. This keeps your instruments precise, even as conditions around them change.

Semiconductor manufacturing and biotech cleanrooms require strict contamination control. Lubricant residue or particles from a worn bearing can disrupt sensitive processes.

Our full ceramic bearings can operate completely dry and do not release particles like worn steel bearings. This makes them one of the few bearing solutions suitable for cleanroom-grade, contamination-free applications.

How We Define Bearing Performance

Choose the Right Material

Selecting the correct ceramic material determines resistance to heat, wear, corrosion, and mechanical stress. Each ceramic material offers distinct mechanical, thermal, and chemical properties suited to specific operating conditions.

Silicon Nitride (Si₃N₄)

High-performance standard ceramic with the broadest operating range.
Used for high-speed, high-load, and precision applications.

Zirconium Oxide (ZrO₂)

Cost-efficient ceramic material for high-temperature environments with moderate mechanical loads.

Silicon Carbide (SiC)

Extreme hardness and chemical resistance for highly aggressive or corrosive environments.

Aluminum Oxide (Al₂O₃)

Economical ceramic solution for applications requiring basic wear and corrosion resistance.
There is no universal “best” ceramic material—only the correct match for the application. ​
View Detailed Material Properties

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Still unsure which material fits your application?

Our material scientists analyze your complete operating profile and recommend the ceramic material that provides the best match between performance requirements and economic efficiency.

Standard & Custom Solutions

Choose the Right Bearing Design -
Standard and Custom Solutions

Bearing selection defines how loads, speeds, and environmental conditions are handled in operation.
Sintertechnik provides both standard ceramic bearings and custom-engineered solutions.

Full Ceramic Bearings

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Full ceramic bearings are manufactured with both rings and rolling elements made entirely from advanced technical ceramics. Their unique properties make them ideal for applications where standard steel bearings cannot meet requirements for corrosion resistance, temperature stability, electrical insulation, or dry-running operation .

Applications

Full ceramic bearings are commonly used in:

  • Chemical processing equipment
  • Semiconductor and cleanroom applications
  • Food and pharmaceutical machinery
  • Medical technology
  • High-temperature and vacuum environments
  • Systems requiring dry or minimal lubrication operation

Key Benefits

  • Can operate reliably with little to no lubrication, including dry-running condition depending on design and material selection
  • Resistant to acids, alkalis, and aggressive chemicals
  • Can withstand temperatures up to 1,000°C and beyond depending on material and design
  • Electrically insulating and non-magnetic
  • Produce no metallic wear particles, supporting contamination-sensitive applications[b]

Hybrid Bearings

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Hybrid ceramic bearings combine steel rings with ceramic rolling elements, providing a balance between the cost efficiency of steel and the low friction, lightweight advantages of ceramics. They are an effective solution for applications where full ceramic performance is not required but improved speed, efficiency, and service life are important.

Applications

Hybrid ceramic bearings are commonly used in:

  • Industrial machinery and equipment
  • Electric motors and generators
  • Pumps and rotating equipment
  • High-speed applications
  • Systems requiring improved efficiency and reduced wear

Key Benefits

  • Lower friction and reduced heat generation compared to steel bearings
  • Can support higher operating speeds, with improvements of up to 30% possible depending on application.
  • Reduced wear due to lower friction between ceramic and steel components
  • Cost-effective solution for extending bearing service life
  • Higher dielectric strength helps protect against electrical arcing

Angular Contact Bearings

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Angular contact bearings are designed to support both radial and axial loads simultaneously through their angled contact geometry. They are ideal for high-speed and precision applications where stability, accuracy, and load handling are essential.

Applications

Angular contact bearings are commonly used in:

  • Machine tool spindles
  • Precision machinery
  • Robotics
  • High-speed rotating equipment
  • Applications with combined loading conditions

Key Benefits

  • Support radial and axial loads simultaneously
  • Maintain precision during high-speed operation
  • Reduce the need for additional bearing arrangements
  • Available in ceramic designs for improved heat resistance
  • Provide enhanced corrosion resistance in demanding environments

Axial/Thrust Bearings

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Axial or thrust bearings are specifically designed to support loads acting along the axis of rotation. They are used in applications where axial forces must be managed separately from radial loads, especially in demanding environments.

Applications

Axial/thrust bearings are commonly used in:

  • Pumps
  • Vertical shafts
  • Turbines
  • Heavy machinery
  • High-temperature applications

Key Benefits

  • Designed specifically for high axial load requirements
  • Available in full ceramic construction for extreme temperatures
  • Maintain performance where conventional bearings may fail
  • Can be combined with radial bearing solutions in systems requiring both axial and radial load support
  • Can be combined with radial bearing solutions for complex systems

PEEK Cage Bearings

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PEEK cage bearings use a high-performance polymer cage combined with ceramic or hybrid bearing designs. The lightweight and chemically resistant properties of PEEK make these bearings suitable for demanding industrial applications requiring reliable operation under varying temperatures and aggressive environments.

Applications

PEEK cage bearings are commonly used in:

  • Chemical processing equipment
  • Food and beverage machinery
  • Industrial applications with demanding environments
  • Systems requiring lightweight, chemically resistant components

Key Benefits

  • Excellent resistance to chemicals and aggressive process media
  • Stable performance across a wide temperature range
  • Lightweight design reduces rotational inertia
  • Smooth operation with low friction
  • Suitable for demanding industrial environments

PEEK Cage Bearings

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PTFE cage bearings combine ceramic or hybrid bearing designs with PTFE cages, which are known for low friction and excellent chemical resistance. They are designed for precision applications where smooth operation, minimal lubrication, and reliable performance are essential, while high speed and heavy loads are not.

Applications

PTFE cage bearings are commonly used in:

  • Precision instrumentation
  • Small electric motors
  • Sensitive process equipment
  • Chemical environments
  • Applications requiring low or no lubrication

Key Benefits

  • Extremely low friction for precision operation
  • Strong resistance to chemicals and moisture
  • Self-lubricating properties support dry-running applications
  • Suitable for small, high-precision bearing designs
  • Reliable performance in demanding environments

Large Diameter Bearings

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Large diameter ceramic bearings are engineered for large-scale applications, with outer diameters that exceed standard catalogue sizes. Their ceramic construction provides performance advantages in large-scale rotating equipment exposed to demanding operating conditions.

Applications

Large diameter ceramic bearings are commonly used in:

  • Power generation equipment
  • Turbines
  • Heavy industrial machinery
  • Large rotating systems
  • High-load applications

Key Benefits

  • Support demanding loads while offering weight advantages compared with steel equivalents
  • Maintain precision and stability at large sizes
  • Withstand thermal and mechanical stress
  • Reduce centrifugal forces compared to steel bearings
  • Provide reliable performance in demanding environments

Miniature Bearings(Micro-Sized)

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Miniature ceramic bearings are compact bearings designed for small, high-precision applications where space is limited but reliability, speed, and accuracy remain critical. Their lightweight ceramic construction enables efficient operation in demanding miniature systems.

Applications

Miniature ceramic bearings are commonly used in:

  • Small DC motors
  • Medical devices
  • Precision instruments
  • Laboratory equipment
  • Compact high-speed mechanisms

Key Benefits

  • Reliable performance in extremely small designs
  • Lightweight construction supports high-speed operation
  • Precise and consistent movement in limited spaces
  • Reduced friction compared to many conventional steel miniature bearings
  • Durable performance under demanding conditions
View Standard Specifications
Specification Range
Outer Diameter 7 mm – 200 mm+
Precision Classes P0, P6, P5, P4
Temperature Range -260°C to +1000°C
Cage Materials Ceramic, PEEK, PTFE, Stainless Steel, Cageless
Compatibility ISO-compliant dimensions
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CUSTOM ENGINEERING

Custom Bearing Engineering Through
FEA Simulation

Reduce bearing failures by designing for your actual operating conditions, not catalogue assumptions. Sintertechnik uses Finite Element Analysis (FEA) to engineer ceramic bearings for real operating conditions. This approach replaces assumption-based selection with simulation-based engineering.

How Simulation Works

1

Requirements Analysis

We define your actual operating conditions through direct engineer-to-engineer collaboration, including temperature, load, speed, chemical exposure, contamination, and lubrication constraints.

2

Digital Simulation (FEA)

A digital twin of your bearing is created and tested under operating conditions. We simulate stress distribution, thermal effects, contact pressures, and tribological interactions.

3

Failure Mode Identification

The simulation identifies exactly where and why standard bearings fail:

  • Thermal expansion causing interference
  • Contact stresses exceeding material limits
  • Lubrication breakdown under operating conditions
  • Geometry-induced pressure concentrations

4

Design Optimization

We resolve these issues before manufacturing. Material selection, geometry, tolerances, and surface treatments are optimized based on simulation data, not assumptions.

5

Validation & Production

Prototypes are tested against simulation results and scaled to production with consistent, repeatable results.

QUESTIONS

Frequently Asked Questions

GENERAL

Materials & Bearing Types

Performance & Operating Conditions

Operating Environment

Engineering & Custom Solutions

Installation

What are ceramic bearings used for?

Ceramic bearings allow application in systems exposed to high temperature (heat, wear), vacuum or many liquid environments like sea-water or aggressive chemicals. Up to 40% of machinery breakdowns are linked to bearings, typically due to incorrect material selection or using standard catalogue bearings in non-standard conditions. Failure risk is reduced when material and bearing design are matched to actual loads, speeds, and environment.

What advantages do ceramic bearings have over steel bearings?

Ceramic bearings offer measurable advantages over steel:

  • Very low friction — smooth running
  • Low or zero maintenance — media-lubrication and zero lubrication are both possible
  • Long service life — high wear resistance
  • Up to 60% lower weight than equivalent steel bearings
  • High corrosion resistance
  • High hardness and stiffness
  • Non-magnetic
  • High temperature stability

These properties make them suitable where steel bearings reach mechanical, chemical, or thermal limits.

Which industries use ceramic bearings?
Used where steel bearings reach their limits, including:

  • Aerospace
  • Machinery & equipment
  • Turbo pumps
  • Chemical processing (aggressive media)s
  • Metalworking (high temperatures)
  • Pharmaceuticals & medical technology
  • Food industry
  • Precision measurement
  • Semiconductor & biotechnology (clean-room, no lubricant contamination)

These properties make them suitable where steel bearings reach mechanical, chemical, or thermal limits.

What ceramic materials are available?

Four technical ceramics are used:

  • Silicon Nitride (Si₃N₄): high-speed, high-load, low weight; broadest range
  •  Zirconium Oxide (ZrO₂): cost-efficient, can be combined with steel, (moderate load)
  • Silicon Carbide (SiC): for seawater or extreme chemical conditions
  • Aluminum Oxide (Al₂O₃): economical for sliding wear parts

There is no universal best material, only the correct match for your application.

Which material is best for my application?
Material selection depends on load, speed, temperature, and environment. The objective is the optimal balance between performance and cost based on the full operating profile.
What is the difference between hybrid and full-ceramic bearings?
Hybrid bearings use steel rings with ceramic rolling elements. They are a cost-efficient upgrade over steel bearings but remain limited in corrosion resistance, temperature capability, and non-magnetic performance due to the steel.

Full-ceramic bearings use ceramic rings and rolling elements, enabling full performance in high temperatures, aggressive media, vacuum, and non-magnetic applications.

Hybrid is a cost-efficient upgrade for standard environments; full ceramic is used for demanding conditions.

Are ceramic bearings non-magnetic?
Yes. Full-ceramic bearings are non-magnetic and suitable for precision and interference-sensitive applications. Hybrid bearings retain steel rings and therefore do not provide this benefit.
What defines bearing performance?

Performance is defined by:

  • Rotational speed (operating and peak)
  • Static load
  • Axial load
  • Dynamic load

These are the primary inputs for correct selection or design. Performance also depends on material, geometry (clearance, tolerance), cage configuration, temperature, lubrication, and environment.

What sizes and specifications are available?
  • Outer diameter: 7 mm to 200+ mm
  • Precision classes: P0, P6, P5, P4
  • Cage options: ceramic, PEEK, PTFE, stainless steel, or cageless, special polymers
  • Temperature range: -260°C to +1000°C
  • ISO-compliant dimensions

Custom dimensions and configurations are available.

Are Sintertechnik ceramic bearings ISO-compliant?
Yes. Bearings are manufactured to ISO dimensions and fit standard mounting envelopes, allowing direct substitution without redesign. Custom geometries are also available.
What temperature range can ceramic bearings handle?
The material range is -260°C to +1000°C. In practice, the cage material is the limiting factor.

Temperatures above 400°C are only achievable with full contact (cageless( or full-ceramic)) bearings.

Why must I specify the main application temperature?
Application temperature defines internal clearance between bearing and cage.

Different materials expand at different rates, so clearance must be calculated for actual operating temperature.

Can a standard ceramic bearing handle axial (thrust) load?
Only to a limited extent. A standard radial ceramic bearing can accommodate limited axial loads depending on operating conditions. For applications with sustained or significant axial load, an angular contact ceramic bearing is recommended.
Can ceramic bearings operate in a vacuum?
Yes. Ceramic bearings are used in vacuum and clean-room environments and can operate without lubrication.

Load and speed must always be specified to determine the correct configuration.

Do ceramic bearings need lubrication?

Not necessarily. Three modes are possible:

  • Dry running — required in vacuum and clean-room environments
  • Media lubrication — process fluid acts as lubricant
  • Conventional lubrication — extends service life, especially for hybrid bearings

Selection depends on environment, contamination limits, temperature, and speed.

Can ceramic bearings be used in chemical environments?
Yes, especially in aggressive media.

Applications involving chemical mixtures are classified as experimental, as compatibility cannot be reliably predicted and must be validated through testing. Full media composition is required.

Can custom ceramic bearings be developed?
Yes. Bearings are engineered using Finite Element Analysis (FEA) to simulate real operating conditions, including stress, thermal behavior, contact pressure, and failure modes before production.
What information is required for an engineering evaluation?

Provide:

  • Rotational speed (operating and peak)
  • Static and dynamic load (radial and axial)
  • Main application temperature
  • Environment (vacuum, chemicals with full composition, no contamination by particles allowed)
  • Mounting method
  • Accurate inputs improve simulation accuracy and reduce failure risk.
How should ceramic bearings be installed?

Preferred method: bonding (gluing) onto the shaft

Avoid:

  • Tensile stress on bearing rings
  • Vibrations within the setup or machine
  • Impacts (e.g., hammer blows during installation)
  • For elevated temperatures, a ceramic shaft is needed

Improper installation can cause premature failure before operation.

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