The Anatomy of a Table Saw Kickback at 50,000 FPS Ultra Slow Motion in HD

429,973
144
Published 2021-12-26
Support what we do at www.kmtools.com
Table Saw Kickback is the nightmare of any woodworker. We wanted to find out exactly how much acceleration, velocity and force a table saw kickback has so we rented the brand new Phantom TMX 7510 high speed camera. This is currently the fastest high definition camera in the world and it DIDN'T DISAPPOINT! We got some NEVER BEFORE SEEN footage at 50,000 FPS and you won’t believe how much force a kickback has. We teamed up with my friend Jens from the YouTube Channel Flammable Maths to calculate all the physics at play during a table saw kickback. We even got a ballistics gel torso to test the damage it would do to the human body.
Read the blog on this video: kmtools.com/blogs/news/how-to...

Let me know what you’d like to see next! Please like, comment and subscribe.
----
Support what we do at www.kmtools.com
Katz-Moses Woodworker’s Apron kmtools.com/collections/katz-...
Brand New Lineup of CMT Chrome Saw Blades use code KMT10CMT for extra 10% off kmtools.com/collections/cmt-s...
Flammy’s Math for Woodworkers -    • Cut Perfect Circles Every Time with N...  
Flammable Maths - youtube.com/c/papaflammy
Table Saw Tune Up Video    • Table Saw Tune Up and Maintenance  
----
Time Stamps
Intro Poor Danny 0:00
What Causes a Kickback 0:45
*How Much Force Does aKickback Have?*2:58
Calculating the Force with Flammable Maths 3:45
What Would a Kickback Do to a Human? 6:40
How to Prevent a Kickback 7:26
Ballistics Gel Testing and Proper Personal Protective Equipment - PPE 9:02
Outro Slow Motion Danny D 11:01
----
*Check out OUR BRAND NEW STORE for tons of great TOOLS and Support the Katz-Moses Woodworkers with Disabilities Fund*: www.KMTools.com
Buy the Katz-Moses Stop Block: kmtools.com/collections/stop-...
Buy the Katz-Moses Magnetic Dovetail Jig: kmtools.com/collections/dovet...
*Buy the Katz-Moses Woodworking Apron*: kmtools.com/collections/workwear
Donate to The Katz-Moses Woodworkers with Disabilities Fund kmtools.com/pages/kmww-charity
----
If it’s not in my Store Taytools is a great woodworking tool source: lddy.no/e90a
I have Walnut Slabs for sale: kmtools.com/collections/walnu...
BitsBits is the BEST place to buy router bits: bit.ly/BitsBits USE CODE JKATZMOSES15 for 15% off
Total Boat Epoxy: bit.ly/30bA39o 10% Discount code JKATZMO
----
Essential Woodworking Skills Playlist:    • Essential Woodworking Skills - The Jo...  
----
Woodworking Routers Video Playlist:    • DIY Router Table Build (FREE PLANS)  
----
Woodworking Joint of the Week Playlist:    • Woodworking Joint of the Week  
----
Woodworking in SLOW MOTION Playlist:
   • Slow Motion Woodworking Videos  
----
Tool Tune Up Thursday Playlist:    • Tool Tune Up Thursday  
----
Check me out on social media:
www.instagram.com/jkatzmoses
www.Facebook.com/katzmoseswoodworking
patreon.com/katzmoseswoodworking
youtube.com/katzmoseswoodworkingshop
----
Tools I love:
My Apron: kmtools.com/collections/workwear
My favorite Dozuki dovetail saw - shop.kmtools.com/dozuki
My favorite Ryoba saw - shop.kmtools.com/ryoba
Marking Gauge: shop.kmtools.com/dbmk
Marking Knife: shop.kmtools.com/dbmk
NEW Suizan Flush Trim Saw: shop.kmtools.com/flush
Narex Richter Chisels: lddy.no/ussg
Knew Concepts Coping Saw (best deal I’ve found): lddy.no/120mz
Dewalt Planer Package: amzn.to/2thEf6O
CMT Chrome are the Absolute Best Table Saw Blades (JKM10CMT for Additional 10% Off)- lddy.no/ggf9
Great Small Tape Measure: lddy.no/120n2
BLEM Combination Squares (high accuracy and value at a fraction of the price due to cosmetic scratch): lddy.no/120n3
The ABSOLUTE best Sandpaper on the market: lddy.no/10ucv
Dewaxed Shellac Flakes: amzn.to/2FeqqYh
5 Minute Epoxy 10% Discount code JKATZMO: bit.ly/30bA39o
2:1 High Performance Epoxy 10% Discount code JKATZMO: bit.ly/30bA39o
Dewalt Trim Router: amzn.to/3Ay6c7D
Dewalt Full Size Router Kit: amzn.to/3FH8Njp
Dewalt Planer: amzn.to/2YSkpiS
Bosch 1.25 HP Colt Router: amzn.to/3DzNjmF
Bosch Edge Guide: amzn.to/2uRRKs2
Bosch Bushings Set: amzn.to/2JUNRYb
Centering Cone: amzn.to/2OjgOAf
MY CNC MACHINES (I highly recommend both)
Bescutter Laser’s Website: bit.ly/bescutter
Avid CNCs of all shapes and sizes: bit.ly/3cdKdqA

All Comments (21)
  • @simongendry1823
    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 youtube.com/post/UgkxXh-4_3-ZT1fFWP91ZV7iVqzElr0lE… 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.
  • @SwitchAndLever
    Great video Jonathan! Lots of food for thought! Though, are we not going to talk about how the ballistic gel dummy, from sheer shock and confusion alone, fell forward into the running blade? While a kickback is awful, let's not forget that getting knocked out in the workshop can have lots of other unforeseen consequences.
  • @KomarProject
    Such awesome information. Footage was epic and I love how you explained everything. great job brother
  • Thanks for having me Jonathan, that was a blast (in the true sense :D) <3
  • @rosswines
    That YT video should be shown to EVERY person who buys a table saw. They are a really dangerous tool used in the wrong untrained hands. Well done JKM and thanks for all your time and effort to put it together.
  • Thanks Jonathan, that was the definitive anti kickback video. I will be making sure all of my students watch this in the future. It is as important to know why something happens as to know what to do to prevent it. Keep control of your wood at all times the wood is contact with any blade. Professional!
  • @MattEstlea
    Been looking forward to seeing this ever since you first announced it. Nailed it once again, great work! No doubt this will change some of the bad practices/information that we've all grown far too comfortable seeing 👏
  • @Lincolnstww
    This is absolutely next level - 5 million+ views incoming. Well done dude
  • My kickback happened in High School shop class. The piece I was cross-cutting was pinched between the blade and the fence. It flew over my right shoulder and dented the wall behind me. I will never forget it. My shop teacher made sure I was ok before asking me what happened and what I learned. I was given the rest of the period off to let the adrenaline dissipate. Thank you Mr. Heinrich.
  • Thanks for this. A huge thanks. I shared on a big Facebook beginner group of woodworkers, hoping it will help people quit the “I know what I am doing, it won’t happen to me” attitude.
  • @EigenDesigns
    6:08 The heavier something is, the more its going to hit you in the face. I absolutely love the collaboration with Flammable Maths. Well done JKM!
  • @johnklein4558
    Jon, Just experienced this very thing. My mistake entirely. Mistake #1. I was working while tired Mistake #2. I was using the fence instead of the crosscut sled. The wood piece was short and I should have realized it but go back to mistake #1. I pushed it through and by the time I realized what was happening it was over. The piece of Meranti bounced in some weird way and I wound up with a bruise on my right arm from the wrist area to about 6” to my elbow with it being from 1”-4” wide AND somehow the piece struck my right abdominal area about an inch to the right of my belly button and about 2” north of there and left a gash about 3.5” long. It’s almost healed but damm …it hurt. Not fun. Thanks for the video!
  • @PapaFlammy69
    Damn, that maths boy was a great addition to the video, who is that young gentleman? :^)
  • Yes, these are no toys. Bandsaws do not have these issues. A major reason for kickback was not mentioned, if I recall correctly - tension in the wood that is released when ripping solid woods. Tension is released, the piece of wood expands, presses against fence and teeth. In Europe, many pro saws have a slidable second fence. You position it at the middle of the saw blade. It creates a gap between main (ripping) fence and the adjustable fence attached to it, so wood can safely expand at/ after the cut. Had a kickback on a small chop saw with a tiny piece of oak 1x1 inch diameter. Hit my hand hard, made a cut and bled. Shock was worse than pain actually. Thanks for great video!
  • @ThePcbdznr
    I was an outlier. Working in the carpentry shop on USCG base NOLA 1979 and I was at the end of a 114-degree day in New Orleans and dreaming of cold beer. I was almost done with a bunch of boring repetitive cuts and was hurrying to finish. I ran a piece through and got the bang! kickback. I was hit right in the brass belt buckle. If I was a skosh taller I would never have met my son. No riving knife, no blade guard, no safety glasses, a cabinet Delta Unisaw. EXTREMELY LUCKY. Great video. Thanks for the link to the professor too.
  • @Jizzlewobbwtfcus
    Lincoln St.Woodworks told me to come here and check your videos and I have to say WOW! I'm loving it. Haven't used my Parklife table saw yet (might have ended up being a waste of £150) but I was always careful of kickback with my mitre and circular saws. This video however was on another level!
  • @susan_halla
    Thank for this. I had my first kick-back earlier this year. Hit me in the ribs and left a gnarly bruise and an abrasion the exact size and shape of the 3/4” plywood I was using. Luckily, no broken ribs. It scared he bejesus out of me and I have even more respect for the tool. Making sure I take all your pointers!
  • @Ross-2077
    The one and only time I’ve had a kickback on a table saw is when I was rushing and cutting corners so to speak. This is the best video on table saw kickbacks ive seen on YouTube, thank you very much Jonathan, you will save some people serious injuries with this video.
  • @daveawb
    Three or so years ago, I was rip cutting a short (9") 2 x 6. I always use a riving knife but in this case I had been lazy and hadn't retracted the blade from a cut I had made previously on a 3 x 3 piece. I also hadn't taken the time to clear some chippings from the bottom edge of the fence. Needless to say, the riving knife saved me from a potentially more serious injury but the piece rolled over the top of the knife and rode the top of the blade and caught my right arm just above the elbow. Thankfully I got away with some serious bruising but it made me completely rethink and then revamp my entire workshop specifically to preserve life (namely mine) and avoid as many future issues as possible. Needless to say, laziness in a workshop WILL MDK you. Don't be like the old me, take the time you need to make safe cuts, it WILL save your life.