There has been some recent discussion about tablesaw safety and specifically the use of blade guards and riving knives (splitters). But it’s not clear to me how or whether the riving knife on say, the new DeWalt or Jet sliding-table saws is different than the riving knife on the true European saws. I’ve played around with those two saws in the store and the knife seem to rise and fall and go from side to side with the blade – is the mechanism better on the European saws?
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Replies
"true european saws"... as opposed to the "fake european saws"?
Hmm, I'd also like to get to the bottom of this. I asked someone on a forum several months ago whether the new Dewalt's was a splitter or riving knife and he told me it was a standard splitter (fixed in height, doesn't rise/fall with the arbor). Maybe our communication was garbled?
If it elevates with the arbor, I'd assume it should be the same as a Euro saw's riving knifer. I've been told several times during discussions like these that the reason the Euro saws and Ryobi Bt3000 can use a riving knife is because their blade elevation mechanism is different and allows the blade arbor to be raised perpendicularly to the table, while the traditional U.S. method is to incorporate the arbor in a trunion that pivots at one end; this causes the blade and arbor itself to pivot along a fore-back arc as it elevates. That arcing movement supposedly makes it very difficult to attach a riving knife and guard to the trunion or arbor, since the guard and knife itself would pivot as the blade was elevated.
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I've played around with the DeWalt in the store and the knife/splitter seems to stay in the same position relative to the blade no matter what adjustments are made to the blade. So I'm confused as to whether the mechanism on say, a Felder or a Rojek works any differently (better).
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