20mm ballscrew ball nut tool
thingiverse
For SFU/DFU2005, 2010 or any modell of 20mm ball screws and nut combinations. Tub measures 15.5mm ID and 18mm OD. Expanding end stops to keep the nut from escape when stored and handled. I Printed my tools in ABS (can also be made in a lathe) . Also Requires a 50mm 4mm screw and maybe a tap to clear the printed threads with (M4 screw can be modified to be used as tap. Use glue/thread lock on screw at cone expander side. To operate insert end stop assembly in to tube hold end stop against tube with one hand, slightly pull the knob and at the same time tighten until it stays safe in the tube. CAUTION Do not overtighten! "Painters tape is to keep the dual ball nut together when removed" NOTE: At least in Sweden you can also get stainless tubes 15x18 that might be usable however the bore might be a little tight. CAD files here: https://grabcad.com/library/20mm-ballscrew-ball-nut-removal-sleeve-1
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