High Temperature Bearing 450°C – Suffix HT4U (Ultra)

High Temperature Bearing 450°C – Suffix HT4U (Ultra) is an advanced version of the HT4 high-temperature bearing series, designed for extremely hot industrial environments such as kilns, furnaces, and drying systems. It can operate continuously up to about 450°C and in some cases tolerate near 500°C with special lubrication systems.

The suffix HT4U (Ultra) deep groove ball bearings have the following advantages:

HT4U (Ultra) bearing is a high-temperature, deep groove ball bearing designed for slow-speed operation, with the following main specifications::

• Temperature capability: up to 450°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 evaporate

Available Configurations HT4U bearings usually come in two versions:

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

Typical Industrial Applications:

The Suffix HT4U 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