This doesn’t really have anything to do with this build but kind of related to the saw blade and I didn’t want to lose this video just in case I needed another project someday.
On the comments Kristijan said it was a sawblade 2 or 3mm thick but should have been 4 or 5mm.
Mounted directly on the PTO of a 70hp tractor at idle.
I haven’t looked to see if there was any more information on this here but doesn’t look complicated to figure out just from the video.
EDIT:
EDIT AGAIN TO ADD:
