Kickback on a tablesaw can be very bad.    For example, my accident.

Mistake:  I decided to rip a piece of wood that would not lay flat on 
the saw.  I was just about through the length of the wood when the wood
rocked on the table, the blade grabbed a part of the board which was 
roughly 1/2" x 1 1/2 " x 10 inches in length and flung it at my face at 
high speeds.    I never saw it coming.    I was wearing Ansi approved 
safety goggles similar to these
http://www.amazon.com/Learning-Resources-Colored-Safety-Goggles/dp/B000G3G1OK. 


The shock of the stick being driven into my head immediately blinded me 
in both eyes.  It was pitch black.   I wasn't sure what had happened but 
I had enough sense to sit down.  I was seriously dazed.  The saw was 
still running, but I managed to turn it off as I sat on the floor.

I could tell that I was bleeding, but I couldn't see anything and my no 
one was home but me.   So I just sat there for what seemed like a very 
long time.
My vision began to return in my right eye so I went into the house and 
headed for a mirror expecting the worse.  I was pretty sure that I had 
lost my left eye.  It hurt like crazy and there was zero vision.

Much to my surprise my eyeball was still intact but I had a cut over my 
eye that was making the mess.   Afterward, with one eye, I surveyed the 
damage:   Lens in goggles was dented and creased directly in the center 
of the left eye.  Lens was driven out of the soft plastic
goggle body.    So the wood hit me directly in the center of the left 
eye lens and drove the plastic lens out of the soft frame and into my 
left eye cavity.

Just about that time my wife arrived home.   She drove me to two 
Emergency rooms, as the first one could not handle an eye injury so they 
directed me to a different hospital.

After Xrays,  several different doctors, and a late night visit from an 
Ophthalmologist who did not want to be called in (it was a Sunday 
night).  I finally got released with some stitches, pills, and a left 
eye patch.

They were initially concerned that the impact had broken my eye socket 
inside my head and I could have internal bleeding.  Fortunately the thin 
bone socket behind my left eyeball was not damaged.  Just a bad case of 
bruising and shock to the Optic nerve.

They were a little concerned that the nerve could become detached so I 
had some followup visits.   No detachment.  :-)

Days later the sight in my left eye began to return.   It was months 
before my sight fully recovered in my left eye.

I later found the stick that did the damage.   It bounced quite a ways 
off the goggle lens and landed behind some other equipment.  It it hit 
me pointy end first (it was tapered as I was trying to trim the board 
straight)  and hit so hard that the wood at the end of the stick was 
visibly bent over much like it was hit hard by a hammer.

If I had not been wearing the goggles I think it is very possible that I 
would have been killed by the stick being driven into my eye socket.   
There was ample force.  If not, the eye would have been likely lost.

Anyway, Ansi approved safety glasses and a face shield is not a bad idea 
when using a table saw.   I am now in the market for a riving knife for 
my Delta Unisaw.  :-)

Dave


On 6/2/2011 12:06 PM, Kirk Wallace wrote:
> Thanks for bringing this up. I have never had a kick-back, so I was
> pretty much unaware of the problem. I'll give it more thought now. The
> saw that does make me nervous is the radial arm saw with its
> self-energizing feed. A feed control might be an improvement, but so far
> I've just tried to be extra careful.
>
> http://www.finewoodworking.com/ToolGuide/ToolGuideArticle.aspx?id=31896
>
>
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