And thanks to the threads, the rod can't back off on its own ... perforated metal band held in a circular shape by a nut. A screw threaded through the nut uses the perforations in the band ...

An early version was just copper wire wrapped around a threaded rod inside a Teflon tube; turned by a stepper motor, the screw did a decent job of forcing finely ground PLA from a hopper into the ...

This open-source compression screw grinder aims to make small-scale ... the bed as the stock rotates thanks to a pulley and a threaded rod, carrying a cordless angle grinder with a thick grinding ...