Greenworks 80v Weed Whacker (String Trimmer) Bump Knob

thingiverse

This model is a replacement of the bump knob (the bit that you hit to let out more line) on a greenworks 80v cordless string trimmer. The part is originally pa6-gf30 (glass-fiber-reinforced nylon), and over time it abrades and eventually will fail, letting the spring out and letting line come out without the button being pressed, leading to the motor stalling. This button is a bit longer than the stock one, so it'll take a bit more force up on the spring, but it has more wall thickness at the end. Material doesn't really matter, as long as you don't let the new button rotate against concrete. I printed mine in PLA+.