Chemical Industry
Miniature Bearing Applications
Bearings in chemical equipment are directly exposed to strong acids, alkalis, organic solvents, and chloride media, while facing high-temperature reaction environments exceeding 200°C. Standard bearing steel is highly susceptible to pitting and uniform corrosion in these scenarios, while highly corrosion-resistant nitrogen-alloyed stainless steel (XA / DIN 1.4108) and hybrid ceramic bearing solutions (stainless steel rings with Si₃N₄ ceramic balls) provide significantly improved corrosion resistance and service life in harsh chemical environments.
Bearing challenges in chemical industry
Chemical bearing must simultaneously resist corrosive media, high temperatures, process media lubrication conditions, and demanding continuous operation requirements.
Strong Acid & Alkali Corrosion
Chemical pumps, agitators, and reactors directly contact strong corrosive media such as sulfuric acid, hydrochloric acid, and sodium hydroxide. Standard bearing steel is highly susceptible to pitting and uniform corrosion. Nitrogen-alloyed stainless steel (e.g. XA / DIN 1.4108) significantly improves corrosion resistance through nitrogen-alloyed microstructure, combined with high chromium content ensuring long-term stability in chemical media.
Extreme High Temperature
Continuous high-temperature environments in chemical reactors, distillation columns, and high-temperature pumps cause conventional grease to rapidly oxidize and fail. Corrosion-resistant stainless steel combined with fluorinated high-temperature grease or MoS₂ solid lubrication maintains stable performance at temperatures exceeding 200°C.
Process Media Lubrication
Some chemical applications require bearings to use process liquids (acids, solvents) as lubrication media, with no external lubricant contamination allowed. Hybrid ceramic bearings (stainless steel rings + Si₃N₄ ceramic balls) are wear-resistant and chemically excellent under media-lubricated conditions, serving as an effective solution for reducing corrosion wear.
Fluoropolymer Sealing
Standard rubber seals (NBR, EPDM) rapidly swell and fail in strong acid/alkali environments. PTFE or perfluoroelastomer (FFKM) seal materials resist virtually all known chemicals, preventing corrosive media from penetrating bearing internals.
Bearing solutions for chemical environments
myonic provides complete chemical-grade bearing solutions from corrosion-resistant stainless steel and hybrid ceramic to custom sealed lubrication, adapting to severe corrosion and high-temperature conditions.
Hybrid Ceramic Bearings
Hybrid ceramic bearings combine corrosion-resistant stainless steel inner/outer rings with silicon nitride (Si₃N₄) ceramic balls, merging steel ring structural strength with ceramic ball chemical inertness. Ceramic balls have low density and friction coefficient, significantly reducing wear under corrosive media lubrication while providing electrical insulation to prevent electrochemical corrosion.
- Si₃N₄ ceramic balls, chemically inert, resistant to acids, alkalis, and organic solvents
- Stainless steel rings (440C / XA) providing structural strength and basic corrosion resistance
- Low friction, low density, suitable for high-speed chemical equipment rotating components
- Electrical insulation preventing electrochemical corrosion
Corrosion-Resistant Stainless Steel Bearings
myonic offers multiple corrosion-resistant steel options: standard 440C (X105CrMo17 / DIN 1.4125) with high chromium content ensuring good corrosion resistance and 61 HRC hardness; advanced XA nitrogen-alloyed steel (X30CrMoN15-1 / DIN 1.4108) generating uniform carbonitride microspheres through nitrogen-alloyed microstructure, improving hot hardness, elasticity, and fatigue resistance for more demanding chemical environments.
- 440C corrosion-resistant steel, standard configuration, high hardness 61 HRC, good corrosion resistance
- XA nitrogen-alloyed steel (DIN 1.4108), outstanding corrosion resistance, improved hot hardness and elasticity
- XA + ceramic ball hybrid design further improving media environment resistance
- Suitable for saltwater, weak acids/alkalis, chlorides, and chemical process environments
Custom Seal & Lubrication Solutions
Addressing the dual challenges of chemical high temperature and corrosion, myonic provides custom seal and lubrication configurations. PTFE / FFKM seals resist virtually all chemicals, fluorinated high-temperature grease maintains effective lubrication film at temperatures above 200°C, ensuring long-term reliable bearing operation in harsh chemical environments.
- PTFE / FFKM seals, resistant to virtually all acids, alkalis, and solvents, preventing media ingress
- Fluorinated high-temperature grease for +200°C to +260°C continuous operation
- MoS₂ solid lubrication option for ultra-high temperature scenarios where grease cannot be used
- Custom seal configurations matching different media contact requirements
Real-world chemical industry bearing applications
The following showcases typical application scenarios and technical highlights of miniature bearings in chemical equipment.
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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