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Riving Knife

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Forum topic by dakremer posted 593 days ago 1616 views 0 times favorited 30 replies Add to Favorites Watch
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dakremer

2449 posts in 1715 days


593 days ago

I dont know why I havent questioned this before – maybe its because its not my saw (I use my bro-in-law’s wood shop), but I always wondered if I could add a riving knife to his Jet saw. It should have been obvious to me, especially since there is an opening in the plate for a riving knife, but it didnt click until I actually saw the flange and bolt/washers for the riving knife (while changing the blade)

My question – Do I need to order this from Jet? Is there a cheaper (possibly homemade) alternative? What are my options?

I’ve been using his saw for a while now, with one kickback, and would like to bump up my safety precautions, and hopefully make that my last and only kickback.

Thanks in advance!

-- Hey you dang woodchucks, quit chucking my wood!!!!


30 replies so far

View live4ever's profile

live4ever

983 posts in 1634 days


#1 posted 592 days ago

Don’t know about the specific saw (do you have model #?), but I know the B.O.R.K. is an option that works for many people.
http://www.theborkstore.com/main.sc

-- Optimists are usually disappointed. Pessimists are either right or pleasantly surprised. I tend to be a disappointed pessimist.

View Mark Kornell's profile

Mark Kornell

473 posts in 1154 days


#2 posted 592 days ago

Given the saw has the mount for it, I would guess that it came with a riving knife. Maybe its kicking around in the dusty recesses of your b-i-l’s shop?

If you can’t find it, DIY is certainly an option. You need to find steel sheet of the right thickness (-just- narrower than the blade), and be picky about how it fits onto the mount, about blade clearance, and make sure it does not sit higher than the blade. I made my own for my old saw and it took three tries to get it right, but definitely improved the saw’s safety.

-- Mark Kornell, Kornell Wood Design

View knotscott's profile

knotscott

5413 posts in 1999 days


#3 posted 592 days ago

The BORK is great if it’ll fit. He’s made some nice improvements to it lately. Which Jet saw are we talking about?

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

View dakremer's profile

dakremer

2449 posts in 1715 days


#4 posted 592 days ago

I’ll find out the model today and post it. I’ll also try posting some pics

-- Hey you dang woodchucks, quit chucking my wood!!!!

View blackcherry's profile

blackcherry

3153 posts in 2447 days


#5 posted 592 days ago

Also check out Shark Guard, they retro fit all types of saw including mine and am very pleased….BC

View Loren's profile

Loren

7385 posts in 2271 days


#6 posted 592 days ago

A riving knife is really a simple thing to make if the mechanism
to make it rise and fall with the blade is there. Of course
you may be able to buy one from JET for a reasonable price.

-- http://lawoodworking.com

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dakremer

2449 posts in 1715 days


#7 posted 592 days ago

why does the knife have to rise and fall with the blade? If you arent cutting through the wood entirely, like dados??

-- Hey you dang woodchucks, quit chucking my wood!!!!

View pintodeluxe's profile

pintodeluxe

3315 posts in 1437 days


#8 posted 592 days ago

If a true riving knife doesn’t work, you can add a splitter to your zero clearance insert.
I have made several splitters from hardwood, and glued them in a kerf in the ZCI. Make the splitter about 1/2” high, and it will work for most cuts except for miter cuts. 99% of my TS cuts are just straight square cuts, so it works for me.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View dakremer's profile

dakremer

2449 posts in 1715 days


#9 posted 592 days ago

That’s a good idea!

-- Hey you dang woodchucks, quit chucking my wood!!!!

View bondogaposis's profile

bondogaposis

2476 posts in 975 days


#10 posted 592 days ago

Have you considered that maybe this saw had a riving knife and that your BIL has taken it off?

-- Bondo Gaposis

View runswithscissors's profile

runswithscissors

904 posts in 649 days


#11 posted 592 days ago

What looks like a mount for a riving knife may instead be for the splitter/blade guard. Like on my older Unisaw. Depends on the age of the saw. I’m studying whether I can make my own, but if not, I’ll go for the B.O.R.K.

View SCOTSMAN's profile

SCOTSMAN

5339 posts in 2209 days


#12 posted 592 days ago

I made a second riving knife easily myself from an old dud sawblade.Needed a larger one for a bigger blade. Just draw out yourshape then cut holding it in a strong vise with a angle grinder with ( my preference) a diamond blade.Careful to remove the teeth section when cutting the saw blank is thinner than the width with teeth attached and poses no width problems.Wear eye glases and gloves too when grinding. I always set my riving knife just a mm or two lower than the height of the blade in question you intend to eventually use this allows for thru and non thru cuts.
Have fun Alistair

-- excuse my typing as I have a form of parkinsons disease

View dakremer's profile

dakremer

2449 posts in 1715 days


#13 posted 592 days ago

Runswithscissors has me thinking that it might be a flange for the blade guard actually…..

-- Hey you dang woodchucks, quit chucking my wood!!!!

View knotscott's profile

knotscott

5413 posts in 1999 days


#14 posted 592 days ago

”why does the knife have to rise and fall with the blade? If you arent cutting through the wood entirely, like dados??”

By definition, that’s what separates a true riving knife from a traditional splitter. There are a lot of options available for a splitter….very few for a riving knife.

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

View eagleknight's profile

eagleknight

18 posts in 947 days


#15 posted 592 days ago

You should check out Leeway. I have a Dewalt Hybrid saw and it had a standard splitter that was hard to install and take out. Now with the shark guard it is easy to change out the splitter between the three sizes since my saw doesn’t have a moving riving knife. Well worth the money I think. He has items for JET.

http://www.leestyron.com/index.htm

-- Matthew Sherman - http://gosherman.org

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