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My steppers have machined pulleys fixed on them so the normal couplings do not fit. These fit perfectly.
My steppers have machined pulleys fixed on them for HTD 3M belt. I cannot seem to get the pulleys off. The pulleys have a length of 14.5mm, but the teeth only go untill 10,5 mm.The pulleys have a diameter of 9.7mm with 11 teeth and a 3mm pitch.
You'll need to print both halves twice, the halves are not the same. I could not make them the same because with 11 theeth i needed a mirrored cavity.
Furthermore you will need 8 m4 x 10mm screws and 8 m4 nuts.
If you als have steppers with these pulleys you might also like http://www.thingiverse.com/thing:51618 , an Y bracket you can use when your belt runs close to your stepper
Prusa 2 Z-Coupling for pulleys by mowi is licensed under the Creative Commons - Attribution - Share Alike license.
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