No.1004E 2008Special Issue on Industry-Related Products Modification Method of Back-up Roll Bearing by Replacing Oil Film Bearing with Rolling Bearing |
| Category | TECHNICAL REPORT |
|---|---|
| Author | J. KUBO N. SUZUKI Industrial Machinery Application Engineering Department, Bearing & Driveline Operations Headquarters |
| Abstract | As back-up roll bearings in rolling mills must support several thousand tons of rolling force, it is known that their running accuracy has significant effect on the gauge accuracy. In cold rolling mills, regarding which the requirement for gauge accuracy is severe, it is particularly critical to keep good running accuracy. Steelmakers have taken various approaches to improving gauge accuracy, one of which is modifying the rolling mills by replacing the oil fi lm bearings with rolling bearings. Since JTEKT in 1984 became the fi rst in Japan to carry out such plate rolling mill modifi cation by the back-up roll bearing replacement, JTEKT has carried out numerous such modifi cations, including the tandem cold mills. This paper presents JTEKT's method of the rolling mill modifi cation by replacing the oil fi lm bearings with rolling bearings as the back-up roll bearing. |
| Keyword | Four row cylindrical roller bearing, oil fi lm bearing, back-up roll, rolling mill |
| Reference | T. KITANO : Development of Super-thin Wall Roller Bearings for Back-up Rolls of Rolling Mills, Koyo Engineering Journal, No.128 (1985) 32.(in Japanese)
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