Reply by runswithscissors

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Posted on Riving knife design

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2767 posts in 2052 days

#1 posted 02-27-2013 05:59 AM

Check out my blog “Riving Knife retrofit for Unisaw.” It’s a quite recent post. I don’t know if your PM has innards similar to the Uni, but it might give you some ideas. I also cite a couple of other bloggers who built their own. Mine is for a right tilt saw, but you could just do a mirror image for a left tilt.

The BORK is not a true riving knife, in that the knife is at the outboard end of a long swing arm. That means that (if you don’t adjust it to the blade height every time you change cutting depth) it’s higher than the blade at full up, and drops below the table well before the blade drops away. Of course some people just set it at an intermediate height and leave it there.

But my main issue with the BORK is that it doesn’t look like a very robust setup. There are a number of posts about the BORK. Use the topic search box at the upper right corner of the window. You might find more info in the “Reviews” section.

-- I admit to being an adrenaline junky; fortunately, I'm very easily frightened

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