... length of rolled screws: screws fixed 45MM Roll (infinite length) dual-useWheel speed : 350rpmWheel diameter: 78(90mm)Roller inner diameter: ... Threaded Rolling Machines:1, Specialized for metal tubes designing, use triangle support, it can guarantee the work pieces real roundness ... system used the electric pump, change manual lubricating pump, use the Japanese bearing.5, Lower noise and durable.6, ...