Tay Cầm Thông Tắc Đầu Phun Mk4

This handle is designed to use with a 1.5mm x 100mm drill rod to unclog a Mk4 nozzle that has been removed from the extruder. It is a tight press fit and doesn't need glue but will need to be pressed with a drill press, or heated and pushed in. I ground a 45 degree point on the end of the drill rod. Press the rod 24mm into the handle. Drill rod is readily available from Amazon.

To unclog, I put the nozzle in a vise and carefully clamp at the copper sleeve. Using a hot air heat gun, I heat just the brass nozzle and then the rod will easily push out the clogged filament. It is best if your heat gun has a nozzle that will focus the air to the size of the approximate area of the brass nozzle only. You don't want the filament to be melting above the copper sleeve.