Review on π§ WINSINN GT2 Idler Pulley Pack of 5 - 20 Toothless 5mm Bore Aluminum Timing Pulley Wheel for 3D Printer by Bob Fasho
Good toothed idler pulley
**Update** After about 50 hours of pushing with each bearing 3 of them have failed. I'm not printing at high speed and the Y and X bearings are failing. The bearings are not the best as mentioned in other reviews. If you are using them on a 3D printer you will need 3mm bushings or spacers as there is no flange at all on the bearing bush. I've found that the screw pulls out a bit when you move it, so using a lock nut is also recommended. Being a toothy slacker, I don't think it matters for print quality (as far as I can tell). All in all, not a bad cheaper upgrade for my Ender 3.
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