Sawmill drive roller. By Cutting Edge Engineering Australia. 45:29 video:
https://www.youtube.com/watch?v=giU5sSwf6sU
Previously:
https://www.homemadetools.net/forum/...457#post181845
https://www.homemadetools.net/forum/...290#post177045
https://www.homemadetools.net/forum/...596#post155378
https://www.homemadetools.net/forum/...961#post133829
https://www.homemadetools.net/forum/...1408#post74350