Coupling

CNC Couplings

High quality couplings are often made from Aluminium. Different types exist.

(please insert examples with pictures)

Polymer Couplings

In several cases a sort of plastic tube have been used as a coupling between the motor shaft and the threaded rod.

from RepRapPro_Mendel_z_axis_assembly

• aquarium tubing
  • silicone tubing 4mm inner diam. - 6mm outer diam. (e.g.: [1])
  • polyurethane tubing (e.g.: [2])
  • pvc
• heatshrink tubing 3:1 ratio (12mm to 4mm) with adhesive ([3])
• vinyl end cap from hobby rc cars 4mm inner diam. - 10mm outer diam. - 22mm long

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As mentioned in this thread : http://forums.reprap.org/read.php?283,151801,151801