Zero clearance insert for saw with riving knife

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Forum topic by greatview posted 08-14-2011 10:29 PM 2898 views 0 times favorited 3 replies Add to Favorites Watch
View greatview's profile


131 posts in 3186 days

08-14-2011 10:29 PM

Topic tags/keywords: jig question

I just got a new Unisaw and want to make a zero clearance insert for it but am concerned that the far end of the insert won’t have enough strength as the riving knife almost touches the far end of the opening. I’ve always cut an insert from plywood for my former contractors saw and there was plenty of material behind the blade. Of course, I could remove the riving knife but I think it really adds to the safety of the saw.

Anybody have some suggestions?

-- Tom, New London, NH

3 replies so far

View knotscott's profile


8057 posts in 3404 days

#1 posted 08-14-2011 10:51 PM

Tom – The only material I’ve tried since installing a riving knife on my saw is phenolic, and it’s proven to be strong enough to cut the slot long enough to accommodate the knife and blade.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

View BTKS's profile


1986 posts in 3493 days

#2 posted 08-18-2011 08:01 AM

Check my postings. I made oak inserts for a Steel City table saw with riving knife. The back is actually split, no problem. The force on the zero insert is all down if everything is working right!!!!! Adjustment screws are to keep the insert from going down, not up. I don’t worry about the lift on the back of the insert because there is an equal drag down on the front. I also make them pretty tight, a straight up lift is about the only way to get them out of the table.
Good luck, just copy the insert in your saw as close as you can. Start over if you get a feeling it’s not going to work right or work safely. The table saw is no place to take chances.
Best of luck, BTKS

-- "Man's ingenuity has outrun his intelligence" (Joseph Wood Krutch)

View David Grimes's profile

David Grimes

2078 posts in 2669 days

#3 posted 08-18-2011 08:34 AM

Yes, phenolic. Keep the riving knife.

I highly recommend the Leecraft ZCR’s. I have two for my Ridgid 4512 (with riving knife intact). They are beyond my ability to make one without spending more.

-- If you're going to stir the pot, think BIG spoon or SMALL boat paddle. David Grimes, Georgia

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