given the price of the blanks, i don't think it's worth the risk. the carbides definitely have a different geometry than the M+, and obviously change when sharpened. i do have to adjust the outfeed table when i install new, or sharpened, carbides.
given the price of the blanks, i don't think it's worth the risk. the carbides definitely have a different geometry than the M+, and obviously change when sharpened. i do have to adjust the outfeed table when i install new, or sharpened, carbides.
Good to know. I get about 500-700 hardwood board ft through each side of my M42 Tersa and in my world that runs a couple of years. Dave
Joe, 2 knives should give less feed pressure.
Since I run Terminus, I have made my own blanks for the 2 opposing slots in my 4 knife heads by just taking a dull set of the steel knives and kissing back the cutting edge on the edge sander. That may not be possible with the smaller Tersa style knife.
I have also found a good use for the old Terminus knife stock. I groove out some hardwood and glue it around the blade and make various shaped marking knives and flat chisels for hand work.
Peter, I seem to remember when I first got the jointer it had 4 and was easier. Maybe I’m just getting old and weak...
Here is a picture of a carbide Tersa and a dummy. The dummy knives are inexpensive.
and a Rali scraper that takes Tersa knives. A while back I saw a Utube of a woodworker sharpening his HSS Tersa knives. I’ve kept all the old ones and may try that sometime just for kicks.
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Thats what I did Dave until I had dull carbides. I usually only change out one knife at a time, but I don't wait until they are horrible. As far as different heights, no they are not. Carbide or HSS, a piece of wood comes out the exact same thickness with either knife new, so there can be no difference. I have about 10 sets of carbide I need to send in.
Last edited by Larry Edgerton; 11-21-2019 at 10:31 AM.