CR-10 Dual Z Tension Pully
thingiverse
We need bearings with a 16mm X 8mm bore, can you check this link: https://www.banggood.com/Wholesale-10Pcs-16mmx8mmx5mm-Steel-Shielded-Deep-Groove-Ball-Bearing-688ZZ-p-49911.html?rmmds=myorder. A simple CR-10 dial-Z belt tensioning pulley is required, it's very straightforward with two types of gears - one has an 8mm bore that fits tightly without a set screw and the other has an 8.2mm bore for use with a set screw.
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