Reply by ADHDan

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Posted on Zero Clearance Insert for Riving Knife

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800 posts in 2102 days

#1 posted 09-11-2012 08:43 PM

I use a thin-kerf blade with the riving knife (and I have a ZCI for that blade). Haven’t had any problems so far.

My theory is that (to the extent the R4512 riving knife is barely thicker than the blade), the knife flexes away from the fence as the workpiece passes through, which would wedge the non-trapped side away from the blade. But I haven’t tested this scientifically; all I know is that I’ve been able to make smooth thin-kerf cuts with no ill effects so far. I’d be interested to know if anyone thinks this is a bad idea.

-- Dan in Minneapolis, woodworking since 11/11.

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