Parametric Z Axis Coupler for 5mm to 8mm (M4 Bolts and Nuts)

thingiverse

I couldn't find the ideal coupler for my Prusa Hephestos thread rod mod, so I created one using M4 bolts and nuts. For me, it works perfectly stably, even without nuts - use M4x12 bolts. Print Settings: Printer Brand: RepRap Printer: Hephestos Rafts: Yes Supports: No Resolution: 0.2mm (0.3mm nozzle diameter) Infill: 5% Notes: 20mm/s :: 200°C for green BQ PLA :: retraction (4mm filament retraction / 0.08 head up / maximum Z speed + maximum E speed). If you want to print all four pieces at once, use fan at 80% (first layer 0%). With a perfectly calibrated bed, three or four raft lines should be enough for nozzle fill.