Extruder feeder screws
I was picking up a few M6 nuts and bolts for the repstrap bushing connector and grabbed several of these at the same time.

They have a high pitch thread which means they can be used on quite a high angle while still resulting in the thread running more or less horizontally. That means a fairly short length such as these should be quite workable in the scheme outlined earlier.

These M8x75 galvanised coach screws are readily available from even a small hardware store.

With a little machining these should turn into quite good parts. It remains to be seen if they will bind with PLA/PHB rods sufficiently well to draw them downwards strongly enough.
- posted by Simon McAuliffe @ 10:05