Reply by MrRon

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Posted on Zero Clearance Inserts, are they any good?

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4764 posts in 3238 days

#1 posted 10-06-2012 08:27 PM

That’s what I said in my original post. Runout, no matter how small, gets magnified at the blades tip. Some saw have a small amount of runout, some have a large amount of runout. There isn’t much one can do about runout, but a ZCI won’t help. As an example; a runout of ±.001” at the arbor will give a runout of ±.005 at the tip of the blade. A blade with a .125” wide tip, will leave a kerf that is .135” wide. Not much in woodworking terms, but this just serves to illustrate the effectiveness of ZCIs. It will keep small cutoffs from disappearing, but it won’t guarantee a clean cut.

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