Worn out parts

I have been printing now for several weeks (a print or two a night) and it has occurred to me that I should print off some replacement parts so that I have them if anything were to break.

I was wondering what are the most common parts people have had fail on them if any. Right now I have a set of PLA Bushings printing and will probably do the z-carriages next as I over tightened a screw on one side and broke part of it. But besides that, I am not sure what other parts I should keep on hand.

just go through them a few at a time. If your print quality is decent, sell what you don't use

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Wooden Mendel
Teacup Firmware

I have a original mendel and I made spare motor mounts, carriage parts and extruder parts as I figured they were the most likely to break. Now building a Prusa and have been making and selling Prusa parts here in NZ so always have enough laying around encase I break anything. I have created my own bushings instead of the standard ones with a capture nut in so they can be bolted on, see separate thread

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Experimenting in 3D in New Zealand