Creativity ELF / Sainsmart / Koonovo 3D Printer Belt Tensioner
thingiverse
Remixed this to fit the Creativity ELF / Sainsmart / Koonovo printers. You will need 2 pcs 625 Bearings with a Size OD 16mm, ID 5mm and H 5mm. I sourced 625ZZ bearings on Amazon.ca at https://www.amazon.ca/gp/product/B07DZDZNJM/ref=ox_sc_saved_title_1?smid=A3C2JSBNBIJBG5&psc=1. EDIT: I have added new arms allowing you to simply attach GT2 idlers with a 5mm bore, eliminating the need for bearings and printed bearing caps.
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