My gears arrived yesterday and I proceeded to print pretty much non-stop with Bambu PLA and Bambu-CF. My results did not agree with the authors in any way shape or form. I immediately noticed that the printer was noticeably quieter. I can attribute that to the helical gears. I ran a flow test from 20 to 40 as I Installed an E3D .60 ObXidian hot end two weeks ago but never ran a flow test so this was as good a time as any. It blew through that and looked great until it didn’t at about 34. Also, the black gear doesn’t appear to be metal, as I assumed. It’s some kind of polymer. For the price, I’d buy these as a replacement set in a heartbeat over the OEM Bambu gears. Considering what it takes to disassemble and clean the things, I’m just going to replace them when I clean the unit. They’re $15.00 on Ali Express. The bottom line is in my opinion and with limited experience, they’re quieter, and higher quality, under my 5x magnifying arm they have fewer tool marks than the OEM Bambu units. They may have other attributes that the nano-coating provides but I can’t tell. At this point, the positives out weigh the negatives, at least for me. Your mileage may vary.
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