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The iron and steel industry is one of the harshest environments in which power transmission equipment is expected to perform. With the ever-increasing overhead of maintenance compounded by pressure to reduce operating costs, NSK has outlined several areas for potential savings in this arduous industry and demonstrated how these savings can be achieved.
Rolling bearings for iron and steel mills have to withstand varied and extreme operating conditions, amongst which are high temperatures, both high and low rotational speeds, heavy loading as well as exposure to moisture, hard particulates and corrosive contaminants. NSK offers a complete range of products for mill processes, designed specifically to deliver reliable and continuous operation under these conditions in applications from guide rolls on continuous casting machines, to backup rolls and work rolls on rolling mills.
In 1980, NSK was the first company in the world to bring the sealed four row tapered rolling bearing (Sealed-Clean™) to the market. Since then, it has continually improved the Sealed-Clean™ bearing, until the latest version which now displays measurably increased load-carrying capacity through newly-developed internal design and a new sealing system. Even grease consumption has been drastically reduced; which not only leads to lower costs but also makes it more environmentally friendly. Sealed-Clean™ bearings can be supplied in case-hardened and through hardened steel. NSK's various steel specifications are particularly wear and shock resistant due to its special heat and surface treatment technology.
Each stage of steel production presents different problems and requires differing solutions to be employed.
Sintering machines - the first stage in converting the iron ore into steel products, and where NSK
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 6902-2NKE NACHI | 15 | 28 | 7 |
| 6802-2NKE NACHI | 15 | 24 | 5 |