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Zero clearance insert wtih a riving knife?

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Forum topic by tengallonhat posted 11-16-2013 03:41 PM 1091 views 0 times favorited 4 replies Add to Favorites Watch
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tengallonhat

79 posts in 1220 days


11-16-2013 03:41 PM

Topic tags/keywords: question

I have a Grizzly G1023RL and bought the matching zero clearance insert. I’m having a hard time figuring out the correct way to use the insert with the guard or riving knife. My initial thought was to leave a small solid piece between the cutout for the blade and the cutout for the riving knife. However if you do this you can’t lower the blade all the way because of the shape of the knife. The other option is to cut all the way through connecting the blade and riving knife slots. This works but it makes the insert a little wobbly. So my question is what’s the right thing to do? Leave a notch and take the knife out when lowering the blade or create one long cutout?


4 replies so far

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BorkBob

124 posts in 2157 days


#1 posted 11-17-2013 01:47 AM

I make and selll after market riving knives and I send a tutorial that explains how to extend the kerf cut in a ZCI to make room for the riving knife.

I have had no reports of ZCI’s becoming wobbly.

-- Please Pray for Our Troops / Semper Fi / Bob Ross / www.theborkstore.com

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knotscott

7215 posts in 2840 days


#2 posted 11-17-2013 02:09 AM

I use a phenolic insert with a kerf cut that’s large enough for the riving knife to pass….the insert is very stable.

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

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tengallonhat

79 posts in 1220 days


#3 posted 11-17-2013 02:51 AM

Thanks that is helpful. My problem is the kerf cut runs all the way out of the back of the insert. Meaning at the back the two sides are completely separate. I think I messed up, but the way the grizzly insert is pre routed for the riving knife leaves really no alternative. I might have to try a different insert.

to clarify, the insert even with the open back is stable, but it takes no effort to put it in the table or take it out after making the second cut. Before I cut the riving knife slot it clicked in nice and snug and tool some effort to pull it out.

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BorkBob

124 posts in 2157 days


#4 posted 11-17-2013 04:04 AM

After I’ve made a cut using the saw blade, I use a straight edge and marker to extend the cut line toward the rear of the insert. I then drill a 1/8” hole where I’d like the cut to end. I finish the cut with a hand saw or jig saw.

-- Please Pray for Our Troops / Semper Fi / Bob Ross / www.theborkstore.com

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