The brass one is the new version:)
You mount it with a M8 nylock nut, so the width of your extruder does not matter.
Key advantage over the old version
- It's machined from straight, round brass stock. Regular bolts often have large tolerances and are not entirely straight. The hyena is guaranteed to be straight.
- Each tooth is individually machines, so there is no "orphan tooth". An orphan tooth is an incompletely cut tooth that occurs during hobbed bolt production with a tap, because the teeth of the tap do not match the diameter of the bolt while cutting. This is a problems because it's the spot where filament begins to slip. It tends to bite a small piece of plastic off the filament as it does not reach deep enough to grip. The next (normal) tooth continues eating into the filament, resulting a complete filament strip, and no printing. The hyena prevents this by making sure every tooth grips by the same amount.
Installing on a Wade style extruder
(Also take note the really useful and special M8 nut. It will be the subject of an another announcement:)
Im a technical guy, any drawings?
I later read on a forum (I've forgotten which one), that the printed replacement part will break as it could not possibly be as strong as the original one. That did had some truth to it...
This is a dummy model of Arcol.hu Hot-end v3.0 to get a feeling of the actual size. A real hot-end cant be printed using plastic:)