NEVER USE A TABLE SAW WITHOUT THIS!! (Riving Knife / Riving Knives--Prevent Kickback/Blade Binding!)
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- Опубліковано 5 лип 2024
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NEVER USE A TABLE SAW WITHOUT THIS!! (Riving Knife / Riving Knives--Prevent Kickback/Blade Binding!)
Table Saws have come a long way in the last 15 years--and no feature is more important or crucial to modern table saws than the RIVING KNIFE / RIVING KNIVES. This short video from The Honest Carpenter will show you how riving knives work--and why you should always use one!
A riving knife is a thin metal fin that sits directly behind a table saw blade, and is attached to the arbor assembly near the motor of the table saw.
Riving knives prevent KICKBACK on table saws.
Kickback is a phenomenon where pressure and stress in the wood grain of a board causes the wood to squeeze or bind the saw blade. This can cause the blade to hurl the wood back towards the operator, resulting in injury.
The riving knife prevents the wood or stock from binding up on the saw blade by acting as a sort of narrow wedge in the kerf of the board.
When the warped lumber squeezes shut, it clamps down on the riving knife instead of the blade.
The riving knife is slightly wider than the body of the saw blade, but slightly narrower than the teeth of most blades. So, it fits neatly in the saw blade's kerf, and lets the unwarped stock pass right by.
The predecessor to the riving knife was the SPLITTER. This was a less adaptable feature, because the splitter typically couldn't be adjusted on the table saw.
Riving Knives can be height adjusted to allow for blind cuts, like dadoes and grooves.
In 2009, Underwriter Laboratories mandated that all new models of table saw should include riving knives.
Along with blade guards and anti-kickback pawls, riving knives should always be used for table saw safety.
Thanks for watching!
The Honest Carpenter - Навчання та стиль
Man I used my brothers dewalt table saw the other day , I didnt have that little thing installed, lucky the board kicked back to my right side flying through the open doorway crashing into some old tools in the back room, I can laugh now but wow I learned fast about kickback . Gonna make sure its installed next time for sure
When we first talked about table saws in my middle school shop class, Scott, my teacher walked us all the way across the room and showed us a 1” dent in a solid oak door. He pointed back to the old table saw 15 feet away, and said “That tool threw a walnut board this far, and it still had enough force to notch this hardwood. Don’t ever get in the way of a strong kickback…” That was 25 years ago, and I still think about it when I’m feeding a hardwood board into a table saw blade 😅
Man after it happened i thought wow that thing would have tore me up . So glad it didnt hit me . One thing is for sure, Some of the lessons you dont forget is Lessons learned . I learned my lesson and hopefully others will follow your lessons.
My saw don't have one, I'm certainly not buying a new one to have it. I stand to one side and use a lot of caution. 28 years of doing carpentry and I have yet to have a kickback.
I helped my dad for many years in my life and I never seen or heard of kickback until it happened a couple weeks ago to me, beware that I am skilled and fearless , but that table saw scares the hell out of me now . 😱
@@01spaz that’s certainly your choice but I would always use a saw with a knife on it those kick backs are no joke!!! for me I can get complacent very easily I hope you never have a kickback but if you were to get one I think you would change your mind but again that’s always up to the individual
Sir, for every comment thanking you for reminding them of this awesome safety feature, there are probably 20 people that also were reminded, but just didn't comment. Lots of injuries prevented via this one video!
Unbelievable timing. Just took mine off a couple of hours ago because it was lose and I didn’t think it was very important. So glad your video popped up tonight before I had a kickback. Timing is everything. I will definitely reinstall it tomorrow before using my saw again. Thanks for saving me from having a stupid accident!
I was the same for quite a while - I thought all the "pros" didnt seem to use them and I left mine off. Then I decided to research what they were for and boy were my eyes openned.
This is absolutely one of the most important videos you have made. Thanks for educating me and your followers.
Thank you! Waited a long time to make this one-the new shop is the perfect setting for these fundamental vids 🙂
This was the best explanation of the what and why of the riving knife I've seen. Thank you for taking the time to put together a cogent presentation without a hint of preaching.
Thank you, Tom! 😄
@@TheHonestCarpenter second his comment. Thank you.
Great video! I lost a finger tip and two months of work by leaving this off when I installed a new zero clearance insert on my table saw. Going to get a SawStop soon, but will never ignore this simple safety device again. Don't learn this the hard way!
My sears table saw that I purchased 50 years ago came with a splitter and guard combo, which was awkward, I wanted so much to follow safety rules, but I had to take it off after about a month. I've never had a problem with kickback. The only thing i have had is a small block of wood vibrating on the table and hitting the blade and thrown at me. Never had an injury with the table saw. I have a lot of respect for them. Actually i like it better when there are no guards in the way... I did buy some plastic push sticks about a year ago mostly to speed up the work and get better control while maintaining safety. Yes, i'm old... 77 years.
So you're saying that you just haven't had an accident...yet. You have been lucky apparently. Folks this is exactly the attitude you do not want to have. "It was awkward." You know what else is awkward? Trying to open jars with your non dominant hand because you couldn't use common sense and realize a blade spinning at 4000 rpm will remove parts of your body before you even realize what happened.
Are you saying that i'm not as careful as I have been for the last 50 years? I'' be 80 in December.@@adamcoe
You just explained how they function the best I’ve seen and I’ve watched several.
You are absolutely right about the importance of the seemingly inconvenient part. My father-in-law didn't have one on his saw, and when a board kicked back, he tried to slap it down with his hand. His right thumb was completely severed. He and his thumb were rushed to a hospital, and the thumb was reattached. After months of painful physical therapy, he now has use of the wayward thumb. Riving knife or splitter are absolutely necessary when ripping. They are inconvenient only when bent or misaligned.
This video explained my table saw problems. I fished the guard from the junk drawer and installed it. Luckily I still had the owners manual which also showed me how to properly align the blade. Thanks.
Great video. I really worry for those with home built table saws with just an inverted circular saw. Courting disaster! 👏🇦🇺✌️
I find I learn something from almost all of these videos. They are appreciated. The kick back pole is the only attatchment I haven't found a need for yet. I believe I now know why. I've been taking the riving knife for granted.
For a old timer. That had 2 years in carpenters school. Then two more years in construction. Then moved on to other livelihoods. Now I got more time to work around the house. WOW I got a portable tablesaw that came with that knife what a difference. In the four years. I used a Lotta table-saws back in the 90’s. That was the one thing the instructor always said to look for a board that looked bowed twisted wobbly curved be on guard when you’re ripping it. Always stay off to the left of the work. Even though it feels comfortable to step in behind it to finish the rip cut don’t. I’ve had some close calls. But that tablesaw was not shy of letting you know if you didn’t take a few minutes just to look over the wood before cut. That table saw would let you know within seconds that it’s being rejected and throwing it out. Whether you want it to or not.
This is one of the most reasonable explanations of the kickback in table saws. Thanks a lot.
Good video Ethan, but it is also worth mentioning that another source of kickback is when the fence is not parallel with the blade and narrower at the outfeed end. 👍❤
Direct, to the point, no fluff. You taught me something important. Thank you!!!
Great coverage on this little safety gem. Always delivered in the same honest style that makes your channel so easy to learn from. Thanks 👍
Never heard of a driving knife before, but very valuable info. Thanks for the explanation, Ethan. 👍
Instant subscribe. Probably the clearest, quickest presentation of information on the subject I've seen. Thank you.
Thanks for the reminder. I just have a DeWalt job site saw and I had put on a zero-clearance throat plate to reduce dust and better support the work. After watching your video, I modified by throat plate to add the riving knife. Thanks again
I got mine in 08 I believe. It came with one. Didn't really know what it was for back then. Unfortunately it broke when assembling it. I was taught back in 1970 to stand on the side a little in case of kick back. I've had kick back a few times.
Now you make me want to fix it and put it on.
😆
finally someone that actually gets the purpose behind a riving knife!!! there are way too many people that tell you that you don't really need it and that it doesnt really have too much of a point beeing there. Also some table saws have a hood over the blade. that is also there to prevent the wood from rising up on the rear and that way also prevents kickback.
Thank you for Another very informative video. I do carpentry work with my nephew as a side line to my real job (lol) and I've learnt many very useful tips from you that I bring with me when doing whatever it is we may be working on. I really love your content and just wanted to tell you that I as I'm sure your other viewers really appreciate the effort you put into your videos. Please keep them coming.
Thank you, retired! I appreciate the positive feedback, and really glad to hear you’re working with your nephew. The next generation always learns from the one before it 🙂
Thank you for that Isaac, I have just spent hours trying to adjust my knife because I couldn't work out which way to turn the screws but I know now 😊
No particular comments, I just wanted to thank you for all the good content you make and the experience you share!
Thank you, PBS! Positive feedback always welcome 😄
Thank you so much
I just brought my table saw
Good insight and information
Very helpful
👍
As always, a well explained and super informative video - Thanks again, Honest!
Make sure you have run your stock through a joiner/ planer to make sure you don't have twisted board! Running that through a table saw can cause kickback despite a riving knife! Also, make sure you're standing where the enemy ain't shooting!
Very good point, Arthur. Thanks!
Thanks. I didn't know that piece was so important. I will use it from now on.
This is the first time I've herd or seen this (Riving Knife) wow...very, very safe feature..👍👍...
another great video for info ,easy to understand and well made by a true pro ! 👍
I really like all your videos!! simple and instructor. Thank you!
I can relate to this. My ryobi job site saw from the late 1990's didnt come with one. My new delta contractors saw has one and I love it.
Never would have conceived of this being a problem. But now I know. Thanks for the great content.
Thanks Hal!
You do have to spend some time setting the saw up... blade, fence, etc. But once done, the saw is great. Fairly compact which is Nice ua-cam.com/users/postUgkxXh-4_3-ZT1fFWP91ZV7iVqzElr0lEb-a I did get an Incra Miter Gauge which takes some setup as well. The stock miter gauge can be adjusted in the miter slot with a little painter's tape... this tightens up the side to side play a lot.
The riving knife is a great thing to have, I will admit, but I'm almost 64 years old and in my 40+ years of woodworking experience I have never used one, I could quickly feel and hear my saw binding at the kerf and would immediately shut off the saw and pushed a small wedge into the end of the kerf and finish cutting. I personally have never dealt with a kick back ever, but I've seen it happen plenty to other people in the past and 90% of those people after watching them, really shouldn't have been using the saw in the first place and I have tried to educate some of those people but the no.1 thing I saw with each and every one was the look of fear using a table saw, respecting the machine is important but fearing the machine will get you hurt
I'm only 35 but I feel like I wrote this comment. I agree 100%.
That's a great tip and thanks for that lesson. I have anew tablesaw and will look for that feature.
Yes my Ridgid table saw from 2014 came with a riving knife and my DeWalt Flexvolt mini job site table saw has it also.
Haven't seen that flexvolt yet, Jeff! I'm gonna look it up...
👍🏻🍻🍺👍🏻
He literally said they became standard in the mid 2k's so what's your point?
Great video, and demo, especially the kickback
Hello again The Honest Carpenter
Thank you for another Great Video. And thank you educating me in Shop Saw Safety. Again thank you
Love u a lot mate
Without your videos i already be one left handed lad
Really enjoy your videos, honest indeed! look forward to next video
Yes! My Dewalt came with a riving knife. I have not had any kickback on this saw. But I am also very careful with how I cut wood. I have watched Steve Ramsey's videos about avoiding kickback. I am determined to keep my fingers attached!
Don't worry all fingers are digital.
Thank you for this video. I have to do some projects and scared of this table saw. I feel a little more confident now:)
You're smart. Thank you for sharing your smarts!
I had an older table saw where the riving blade was attached to the back of the table & had to be aligned. I had to rip a 2x6 & the knife was not aligned properly. In an effort to align the wood onto the blade, the wood pinched the blade. That was exciting. I never made that error again The knife did have a flaw in the screw hole preventing it from aligning. They did supply a free replacement
Great video, stuff I didn’t know. Thanks for sharing.
can older table saws be retro fitted with riving knives?
likely, but itd probably take some engineering to do it yourself
Very helpful! Thanks for putting this up...
Great explanation. I just learned something in new and important to my safety.
I parted with an older saw that I loved after one nasty kickback...my new saw has one and it works very very well.
thanks for letting us know if we could add on to an older machine
Great explanation of riving knives. I appreciate your focus on safety. Another thing to consider with kickback is that it can pull your hand into the blade. So that blade guard is an essential safety component along with the riving knife.
Good call, Birdlab! I’m yet to address pulling from the back of the saw on the show, but I will. Pro rock climber Tommy Caldwell lost a finger that way!
I just learned something new!!! Thanx🤙🏼
Very helpful. Thank you. Peace and good fortune and good health to you and your family. ❤
brilliant explanation
Good information. Very clear.
if you have an old saw, like a solid 70's contractor saw or something like that, and dont want to use the pawls and riving knife and blade guard combo things that came with them all look into splitters! I got an MJ splitter and let me tell you my confidence when using an insert without one vs one with one now is massively different. Other than the saw itself, one fo the best purchases I made.
Do you have to make your own insert?
I built my own fence 15 years ago and cut all my own pickets from deck planks. This included dog-earing them and this was long before I owned a miter saw. The fence line was 640 feet with about 1280 dog ears cut. I got popped in the mouth by the triangular corners about three times while cutting those stupid things. A few others missed but flew past my face. That hurt and they were only a couple ounces each.
I can only imagine the horrors of real kickback events.
Nice video as always. Thanks for sharing.
🤗 THANKS ETHAN…FOR KEEPING US INFORMED AND SAFE 👍😍😍😍
This video explains a lot. In shopping for my first table saw, I looked at some used ones that had no riving knife or blade guard. When asked, the seller would respond, "What's a riving knife?" Usually this involved older table saws dating back 20-40 years and sellers who'd not bought one after the UL mandate. When asked about missing blade guards, the usual answer was, "Oh, those are a pain..." or some such.
My 1948 Unisaw has a riving knife.
Much useful. Never thought that so little piece of metal does so much work. I still don't have table saw but today I was watching many in one big tools shop and I was wondering why that piece of metal is there. Many thanks for the information
Excellent explanation and visuals 👍
There was a hole on the wall behind the table saw in my schools shop. The teacher told the maintenance guy to leave it in place as a reminder of how hard the board flies back.
There can never be enough warnings on this. I wonder how many fingers this video will save.
Oh wow, we have the same table saw, except I have the EU version. Ok, so I do not use the blade guard, but I would never make a cut without a riving knife. Also that table saw is really excellent, the fence system is the best I've ever experienced.
Thank you for the explanation!
Great introduction to this little feature. Thanks!
Thanks racenuke!
Great information for rookies.
Great information, thank you
I bought a SharkGuard for my old Delta Unisaw, was worth every penny…and then some.
Never knew this existed thanks for sharing
As always, great info!
From Buffalo, N. Y. Thank You for explaining it, Thanks.-
Great advice!
My 1948 Unisaw has this, but I never installed it for some reason.
Gonna have to see if I can get it hooked up.
I got that dewalt. Love it!
Hey this was good to know. Apparently we have one somewhere not attached to the table saw. I think it's time to find it ! Thanks 👍👍
yes it could save your life...
Very interesting never knew that thank you for the update
great bro, i understand the purpose of riving knife
thank you!! didn't know what that was for...
I learned a lot in this video
I have a thinner diablo 90 tooth blade that cut too thin for the factory riving knife so I made a custom one which worked perfect just for that blade.
very helpful for a noob like me. thx!
Very good. Thankyou
Thank you for the education.
Great videos! Very helpful and practical. I'd like to suggest a video on tool maintenance, especially circular saws and routers.
Good idea, Manila! I’m jotting it down 😄
I got my table saw in 2009 actually for fathers day. Barely missed this upgrade. Mine has 2 spring loaded one-way teeth. I take them off when I'm ripping plywood. But thats it.
Thanks so much for this one. Time and time again, I check in, and it seems like your latest video has just answered a question that was rolling around in my active, but uneducated mind. I'd love to help you out with the amazon commission, but being in Germany, maybe I'll just order a t-shirt. Keep up the good work!!!!
Saved saw to wish list.
I have been a cabinet maker since 1975 , and I'm still working today . The pro saws ( 3 phase machines ) all had them back then and the first thing that would happen would be to take that riving knife OFF !! When all the big box stores started offering table saws and miter saws to all the idiots who shouldn't have one this is when kick backs started to become a thing . If one knows what they are doing kick backs are a very rare occurance . Most of the time the fence is NOT set up properly , CAUSING the kick back . Couple that with gross ignorance of how wood reacts when cut improperly , this is how it has become an issue . And " yes " I can back everything that I say .
Hi Ethan, can you upload more videos regarding safety in the use of the table saw. Thanks a lot.
Ethan... Love your channel!!! Thank You!!!
Thank you, Mark!!
@@TheHonestCarpenter.... Don't tell my brother, but one afternoon I used his table saw to rip a board... dammed if that saw didn't ROCKET the cut-off piece of wood into the side of his car in the garage!!! haha. Shhhhhh!!!
Thank you again for a very informative video.
You’re welcome, Jim!
Brilliant video! I didn’t know!!
Thanks
Bob
England
Thank you, Bob!
Thank-you for this critical information. I don't think my old shop Smith has this feature. Can it be retro fit?
OK, I'm putting mine back on tomorrow. I took everything off after watching UA-cam videos that just show a blade and nothing else.
This is the one to keep, Annette! I see folks take them off in the field, but that just seems crazy to me. If anything, they’re like another type of guide tracking your cut for you. They simply have no downside!
I think some youtubers pull off all the safety things to make better videos.
I saw a little peice of wood shoot a hole in drywall when this wasn't on there at my dads garage.
@@TheHonestCarpenter The only "downside" is that it prevents you from making clean straight cut somewhere in the middle of the material piece. Making such vent cuts in baseboards/cabinet toekicks instead of puting registers are popular nowadays and i know two people who messed up hands doing that, one of them being me. I was lucky with a few stitches on a thumb, other guy had his hand built back together and was out of work for more than a year. Having such stats says that it "prevents" from doing this for reason, the tool is not sutable for task, but people still do that.
Very simple and educational video
Thanks for watching, Jay!
Thank you.
Thanks for the reminder! My saws are older, I assume I can pick up an aftermarket one.