4000kg Payload Heavy Handling 7th Axis Robot Linear Track 30m Travel Rail The 4000kg payload heavy handling 7th axis robot linear track carries a large floor mounted robot along a 30m rail, so one machine can serve a press, a welding fixture and a pallet station in sequence. The carriage is rated for a 4000kg moving mass at 1.5m/s, and repeat positioning accuracy of 0.05mm keeps the tool position identical at each station after a long travel move. Rails are built from 0.5 m