Can handle heavy loads, speed, vibration, impact, and dynamically self-align at high temperature in a rugged and easy-to-install mounted bearing assembly. All bearings are equipped with PTFE labyrinth seals and are factory lubricated with our HTB550 PFPE base oil, NLGI No. 2, PTFE thickened grease. Non-Expansion bearings resist axial shaft movement. KX series bearings are designed to significantly outlast all other equivalently sized roller bearings in high-temperature service above 180°F up to their rated temperature. This is achieved with superior metallurgy, elastomers and lubrication selected explicitly for service in the specified temperature range.