This is my experience with brass as a drive wheel.
I hobbed this naval grade 485 brass from Mcmaster Carr.
The teeth are too soft and collapse, and break off, thus jamming the nozzle.
I did have a bit come through the .4mm diameter nozzle, and end up in the print. ( flake image)
You can see the wheel has folded over teeth, and the flake of one ready to come loose.
I put a circle so you can see the dent made by the PLA into the teeth.
.
This wheel was only 4 hours old.
Just an FYI. I'm moving to stainless steel and using a #0 center drill, pecked 18 times into the diameter.
I hobbed this naval grade 485 brass from Mcmaster Carr.
The teeth are too soft and collapse, and break off, thus jamming the nozzle.
I did have a bit come through the .4mm diameter nozzle, and end up in the print. ( flake image)
You can see the wheel has folded over teeth, and the flake of one ready to come loose.
I put a circle so you can see the dent made by the PLA into the teeth.
.
This wheel was only 4 hours old.
Just an FYI. I'm moving to stainless steel and using a #0 center drill, pecked 18 times into the diameter.