Mounted Bearing Units up to 400°C
High-temperature Stainless Steel 316 mounted bearing units (up to 400°C)
Extreme Bearing manufactures high-temperature Stainless Steel 316 Mounted Bearing Units built specifically to operate continuously at temperatures up to 400°C (752°F). Standard mounted bearings break down rapidly under extreme heat because seals melt, lubricants carbonize, and differential thermal expansion locks the internal rolling elements when the shaft expands faster than the housing.
We eliminate thermal failure at its root by pairing solid AISI 316 housings with specialized high-temperature inserts. Each unit smoothly handles both axial shaft expansion and radial clearance loss through precise Fixed/Expansion setups. Extreme Bearing goes to the extreme so you are never left with an unresolved application challenge. Engineers can effortlessly combine this 400°C heat endurance with full ATEX certification, IP69 washdown capability, submerged sealing systems, and extensive custom options — all within a single, highly reliable unit.
Non-linear thermal load capacity decay in mounted bearings
Standard bearing load calculations often falsely assume a linear relationship between rising operating temperatures and capacity loss. In reality, thermal degradation is highly non-linear and accelerates rapidly. Beyond critical thermal thresholds, standard bearings experience catastrophic loss of dynamic load capacity due to material softening, rapid lubricant carbonization, and severe internal radial clearance loss.
Therefore, whenever your machinery operates under high-temperature conditions, choosing an Extreme Bearing High-Temp Unit is critical to preventing costly, unexpected downtime.
The Extreme Bearing solution: by combining ultra-robust AISI 316 stainless steel housings with heat-stabilized inserts, custom C4/C5 radial clearances, and solid-state graphite lubrication, Extreme Bearing HT400 units eliminate non-linear thermal collapse and deliver reliable, continuous operation up to 400°C.
Mastering the challenge of thermal expansion
Rising temperatures cause rotating shafts to expand significantly in length due to thermal growth. When both bearings on a shaft remain axially fixed, this expansion generates severe axial loads that rapidly damage internal rolling elements and housing structures.
Extreme Bearing solves this by integrating dedicated room for axial displacement directly into the design. This flexible arrangement allows the shaft to move in a controlled manner within the housing without increasing internal friction or stress. Consequently, your machinery absorbs heavy thermal growth while maintaining smooth operation and long-term equipment reliability.
Technical specifications & high-temperature configuration options
We build every unit to absorb extreme thermal expansion while maintaining maximum load ratings and environmental sealing.
| Feature category | HT400 high-temperature options & features |
|---|---|
| Max operating temp | Continuous performance up to 400°C (752°F) and cold resistance down to -40°C. |
| Housing material | Cast Stainless Steel Grade 316 / INOX (UNS S31600). Retains high tensile strength and structural integrity under severe heat cycling. |
| Internal bearings | High-temp Spherical Roller Bearings (SRB), Type E Tapered Roller Bearings, or Self-Aligning Ball Bearings (Y-Type). |
| Thermal expansion fit | Precision C4 and C5 internal radial clearances prevent thermal locking between shaft, inner ring, and housing. |
| High-heat sealing | Non-contact metal labyrinth seals, fluoropolymer (PTFE) lip seals, and stainless steel shields. Seals will not harden or crack at high speeds/temperatures. |
| High-temp lubrication | Solid graphite inserts, dry lubricants, high-temp synthetic greases, and food-grade NSF H1 high-temperature formulations. Prevent grease washout and carbonization. |
| Safety certifications | ATEX rated for hot, explosive gas and dust environments (Atmosphères Explosives). |
| Housing styles | Pillow Blocks (EXS / Tapped-Base EXC), 2/3/4-Bolt Flange Units (EXF, EXG, EXW), Split Plummer Blocks (EBL), Take-Up Blocks (EXU), and Cartridges. |
Engineered for extreme heat & combined harsh environments
Extreme temperature rarely occurs in isolation. Extreme Bearing units deliver reliable power transmission when high heat combines with severe corrosion, moisture, or abrasive dust.
High-temp washdown & food-safe processing
- Continuous 400°C process ovens, industrial baking lines, and dryer drums require strict hygiene.
- Washdown-ready AISI 316 housings allow direct hot-water cleaning without rusting, while food-grade high-temp lubricants meet NSF standards.
Industrial ovens, kilns & furnace systems
- Roller hearths, cooling beds, furnace recirculation fans, and thermal incinerators subject bearings to relentless radiant heat.
- Heavy-duty labyrinth seals run friction-free at elevated speeds, lowering operating temperatures and extending component life.
Hot & abrasive environments (mining, steel & power)
- Coal-fired power plant conveyors, glass manufacturing lines, and asphalt mixing plants combine 80°C–400°C heat with destructive abrasive dust.
- Dual-protection sealing keeps coal and silica dust out of the grease cavity, eliminating premature bearing wear.
Chemical & petrochemical processing in ATEX zones
- High-temperature reactor agitators and exhaust systems operating in volatile atmospheres.
- ATEX certification guarantees safe operation in hazardous zones where high surface temperatures and explosive gases coexist.
Solve your high-temperature bearing failures
Frequent grease failure, thermal locking, and constant re-lubrication ruin equipment reliability. Extreme Bearing HT400 units eliminate heat-induced downtime by combining 400°C thermal endurance with corrosion resistance, robust sealing, and custom modular design.
Contact our application engineering team today with your temperature profiles, shaft dimensions, and environmental conditions to configure your HT400 stainless steel bearing unit.