Rollvis (Switzerland) RVI inverted planetary roller screws keep the roller array inside the nut tube while a smooth screw shaft extends outward, delivering precise linear motion in a compact, small-lead, lightweight package; shaft diameters 8-100 mm, leads 1-16 mm, timing rings built into the shaft and a highly customizable nut that can act as a push tube, cutting actuator part count and energy use. High load rating and long service life suit robotic arm assemblies, spot welding and sheet-metal brake presses.
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