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The hexagonal coupling can be adapted to our hexagonal wheels, so choose a hexagonal coupling with a bore of how many millimetres for how many diameters of shaft you need!

Note:
- The hexagonal coupling is used to connect the motor shaft and the hexagonal wheel, and cannot be used to connect two shafts.
- The hexagonal coupling side fastening with screws M3, hexagonal surface of the central hole of the set screw is M4 screws. (Screws not included)
- One M3 allen key for every order and One grub screws for every coupling.

【Parameters of the coupling】
- Edge length is 7mm
- Diagonal distance is about 13.6mm
- Opposite side to opposite side is 12
- Total coupling height 17-18mm
- Cylinder height 12.5mm
- Outer diameter of the cylindrical part is 12.7mm.
- The bore diameter of the cylindrical part is 3mm, 4mm, 5mm and 6mm, which is suitable for shafts with a diameter of 3mm, 4mm, 5mm and 6mm respectively.