Development of NSK Extra-Capacity Sealed-Clean Roll Neck Bearings for rolling mills

摘要

Four-row sealed tapered roller bearings used in roll necks of rolling mills are required to achieve longer life amid severe environmental conditions that include high operating load, extreme shock loads and the penetration of water and scale into the bearing. NSK has recently introduced Extra-Capacity Sealed-Clean Roll Neck Bearings for roll necks in rolling mills. Realizing longer life and higher reliability, the new bearing has higher load capacity, is made of Super-TF material that lengthens life under severe lubricating conditions, and utilizes a new bore seal that controls the build-up of negative pressure in the bearing interior. This paper presents NSK's new Extra-Capacity Sealed-Clean Roll Neck Bearings. It describes their features and discusses the research and development of the new sealing arrangement.