by bgire » Fri Feb 27, 2026 1:20 pm
After nearly one year of use I dropped (almost) ALL my cutters, scalpel, scissors, etc... for an ultrasonic cutter.
This device is now available from about $80 and does extremely fine and accurate job,
even on injected plastic.
The trick is : don't apply pressure on the plastic, just let the vibrating blade do the job. Pressure will heat and melt the plastic.
As an example, here is a small video I did, showing clean cutting of very small parts on a plastic sprue (Flyhawk 1:700 HMS Martin). Images speak by themselves. Clean cut, no melting.
https://www.youtube.com/watch?v=_Gi-WVrbLF8
After nearly one year of use I dropped (almost) ALL my cutters, scalpel, scissors, etc... for an ultrasonic cutter.
This device is now available from about $80 and does extremely fine and accurate job, [u]even on injected plastic[/u].
The trick is : don't apply pressure on the plastic, just let the vibrating blade do the job. Pressure will heat and melt the plastic.
As an example, here is a small video I did, showing clean cutting of very small parts on a plastic sprue (Flyhawk 1:700 HMS Martin). Images speak by themselves. Clean cut, no melting.
https://www.youtube.com/watch?v=_Gi-WVrbLF8