Operating Temperatures Exceeding +200°C
High-Temperature Bearing Solutions
From turbochargers to high-temperature industrial furnaces, from jet engines to welding equipment — extreme high-temperature applications impose stringent requirements on bearing material heat resistance, lubricant stability, cage design, and dimensional accuracy. myonic and the MinebeaMitsumi Group deliver proven high-temperature bearing technology covering the full application range from +200°C to +450°C.
Critical challenges in extreme high-temperature environments
Above 200°C, the limitations of standard bearing materials and lubricants rapidly emerge.
Thermal Expansion
At high temperatures, bearing rings, balls, and cage components have different thermal expansion coefficients, causing internal clearance changes and preload loss — in severe cases leading to seizure or raceway damage. Material selection and clearance design must be precisely calculated for the target temperature range.
Lubricant Breakdown
Standard mineral greases rapidly oxidize and decompose above 150°C, losing their lubricating function. Above +200°C, specialty fluorinated greases (rated for 250°C+) or dry solid lubricant coatings (MoS₂, WS₂, graphite, PTFE) are required as alternatives.
Cage Deformation
Polymer cages (such as PA66, PEEK) tend to soften and deform at high temperatures, affecting ball guidance precision and bearing rigidity. High-temperature applications typically require silver-plated steel cages, which combine structural strength with emergency solid lubrication capability.
Dimensional Stability
Ordinary bearing steel undergoes retained austenite decomposition at high temperatures, causing irreversible dimensional changes. Aerospace-grade M50 steel or BG42 steel with specialized heat treatment maintains excellent dimensional stability and fatigue resistance at elevated temperatures.
Purpose-engineered for extreme high-temperature environments
myonic offers a high-temperature bearing product line spanning aerospace, automotive, and industrial sectors, with support ranging from standard specifications to fully customized solutions.
M50 Aerospace Steel Turbocharger Bearings
Using the same M50 aerospace-grade bearing steel found in aviation jet engine main bearings, combined with ceramic ball design, developed under the leadership of myonic and the MinebeaMitsumi Group — applying aviation material technology cross-industry to the automotive turbocharger sector.
- Bearing operating temperature: -40°C to +320°C
- Exhaust environment temperature: exceeding 800°C
- Turbocharger speed: 200,000+ rpm
- M50 aerospace steel + ceramic ball hybrid design, high wear and fatigue resistance
- Silver-plated steel cage with emergency solid lubrication capability
- Unitized design reduces OEM assembly time
Specialty High-Temperature Lubrication Solutions
myonic provides multiple lubrication solutions designed for high-temperature environments, encompassing specialty fluorinated greases and PVD dry solid coatings, adapting to the combined requirements of different temperature levels and vacuum conditions.
- Specialty fluorinated grease: rated for 250°C and above, suitable for medium-high temperature environments
- MoS₂ / WS₂ / graphite / PTFE solid lubrication: long-term stability at high temperatures
- PVD silver, gold, MoS₂ coatings: magnetron sputtered, covering complex 3D geometries
- Silver-plated steel cage: continues to operate even after lubricant loss
- Full ceramic bearings (Si₃N₄): extreme high-temperature applications up to 800°C
Real-world high-temperature bearing applications
The following showcases typical scenarios and technical highlights of miniature bearings in high-temperature applications across industries.
Some images on this page are AI-generated illustrations used where authentic photographs are not readily available. They are for visual reference only and do not represent actual product appearance or specifications.
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