High Temperature Bearings 350°C (HT1)

High-temperature bearings of 350°C (HT1) are special industrial bearings designed by GMW to operate in extremely high-temperature environments up to approximately 350°C. At this temperature, the base oil evaporates, leading to the failure of conventional bearings due to lack of lubrication. HT1 is a useful alternative, as it can operate smoothly thanks to its special lubrication solution.

The suffix HT1 high-temp deep groove ball bearings offer the following advantages:

• Temperature capability: up to 350°C maximum 
• Low-speed operation: designed mainly for slow-rotation applications
• Material: Made from chromium steel material
• C5 clearance design compensates for temperature-induced distortion
• Surface coating: Manganese phosphate coating (according to EN ISO 9717) for corrosion protection and wear resistance
• Lubrication: Special MoS₂ (molybdenum disulfide) high-temperature grease forming a dry lubricating film when oil evaporates

Available Configurations HT1 bearings usually come in two versions:

• Open type (no shield)
• ZZ type – two heat-resistant steel shields.

Typical Industrial Applications:

The Suffix HT1 bearings are widely used in high-temperature industrial processes, such as

• Brick kiln carts
• Ceramic furnaces
• Glass manufacturing lines
• Steel rolling conveyors
• Die-casting machine and aluminum furnace
• Etc...

Extensive range

• 6000 … 6020
• 6200 … 6220
• 6300 … 6320