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Ryobi 18V String Trimmer - Brush Cutter Attachment

by doctriam Jul 17, 2017
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Give this design a try. You will need two M3 screws and nuts (I would use nylon lock-nuts for long term use).
This redesign allows the clip part to print with the layer lines to be opposing the stress of the clip holding direction. Also is a four blade design that should last a little bit longer.

my only complaint is that my dad keeps hitting fence posts with it and then it explodes lmfao. I've printed him like 6 so far. I gotta try nylon, petg holds up quite well as long as you don't hit fence posts

I've printed this in PETG and PLA and both break at the tab area when inserting it :( did you have this issue by any chance?

The layer direction is the problem with the clips, the stress is in the same direction. I had a seminar problem with a minimalist wallet for the money clip part and also with a Ziploc bag hanger breaking at the clip part. I was able to correct the wallet by changing it from a one part design to a three-part with screws and nuts to hold the three parts together, hasn't broken yet (over 6 months). I like this design and I may have a way to fix a few things and also going to try HTPLA or layer change from HTPLA to PETG to give an edge that will wear away but sill stays somewhat sharp.

I'm actually working my way up to that. I bought and installed an all-metal hotend this week so that I could push the extruder temperatures higher. I'm printing one of these in PETG right now, and, if that fails, I'll try in ABS. If the ABS fails, I'll order some nylon.

BUT...it's a great idea, even if I was already working my way there.

How did you PETG one go?! I want to print this in PETG, but it seems that you've had success with PLA so I want to do that first!

What would be really interesting is if you used 0.065" trimmer line for your filament. Meta, very meta. Just would have to find the one with out fiberglass in it.

Haha. That would be awesome.