... footprint,Centralized Lubrication Diameter 400 Mill Compound Gear Box, hot rolling mill Steel rolling machine, a part of rolled steel production line, ... the mill models. Speed:Diameter 250~350, line speed is 5~12m/s;Diameter 350~550, line speed is 0 ... .5~5m/s. Production: Wire and re-bar, You can ... view and guidance, thank you! Diameter 400 Mill Compound Gear Box