I was at the yard where I get most of my pine yesterday and I
overheard a conversation about Saw Stop. One of the guys was saying
that the Saw Stop safety mechanism will sometimes engage when no
hand/finger/whatever touched the blade.
Any of you guys have experience with Saw Stop?
Hello Stout - I did and my Reply is below.
But, this does bring me to add my two cents on the subject of
*redundancy of topic* as this seems to come up from time-to-time.
I woulld suggest to you guys that there is nothing wrong with such
under certain (probably many) circumstances. At times I get the
feeling that once a Thread -with a particular Subject- has been posted
and run its course, that is supposed to close the door on the subject.
For example; because we had a post on Saw Stop I am supposed to search
and read. If I don't find an adequate answer to my currrent question
- too bad. This attitude assumes that everything anyone ever wanted to
know about the subject was contained within that original Thread and
there can be no further input, no new information, no additional
From my perspective this group has a significant number of members who
float in and out. It is possible that not everyone with something to
say added to that original message.
Further, in this case the subject deals with a rather new technology.
There might be new information.
In fact, I was here on the group when the thread passed through
earlier this year. Before I posted today I looked at the SS website
(again) and then googled and yahoo'ed the subject. I was still not
satisfied that I had an answer so I posted the specific question.
At the very least I can hope that the thread helps Mort make his
If you did, you wouldn't be asking the same question that has been asked and
reanswered several times. Your question "Any of you guys have experience
with Saw Stop?". Googling Saw Stop alone would have revealed that, Yes,
several people have experience with Saw Stop. Your statements regarding the
"safety mechanism" and its tendency to engage with no flesh contact, has
also been discussed ad nauseam.
Your are more than welcome to ask this question on a daily basis (it's a
free world), but nevertheless I though my suggestion might be helpful.
Flame me if you want...
You weren't satisfied when you found out that several people have had
experience with Saw Stop?
My understanding is that if any embedded metal touches the blade it
will activate the stop mechanism. Also wet or green lumber can also
trigger it. Basically I think anything that has a lower resistance than
dry wood will result in activation, so maybe some painted and laminated
surfaces will trip it as well.
I'm researching the SawStop for purchase by a school district and have
contacted the manufacture directly and received a reply, but I still
don't have a reliable answer to some questions. Like what happens with
a fast feed rate? On their website (www.sawstop.com) they have a video
that shows a hotdog being pushed into the blade and the result of the
blade stopping just nicking the surface of the hotdog, but nowhere is
it mentioned the feed rate a which this demonstration was done.
Also, they don't have any data (at least none that they would share
with me) related to kickbacks. As I'm sure everyone here is aware the
speed at which a kickback occurs, I have doubts on the usefulness of
the SawStop mechanism in a kickback situation.
Joe Bemier wrote:
On 9 Jul 2006 12:21:44 -0700, in rec.woodworking, "Mort Stevens"
This was actually the first time I'd heard of this impressive system,
but http://www.sawstop.com/how-it-works-overview.htm says the
following about the hotdog video:
"The photo at the right shows what happens on a SawStop saw when a
hotdog (representing a finger) hits the spinning blade at a speed of
about 1 foot per second. "
Forrest Anderson email@example.com
Thanks, Mort - very useful.
Also, very interesting that you should mention feed rate because those
guys touched on that point and I did not recall it until I read your
Considering the cost of replacement of the mechanism I would need to
feel confident that the thing is not going to trigger due to say
*imperfections* of some kind.
Unfortunately, I was not able to get more info but it sounded like one
of the guys owned the machine and was not happy with it.
Good luck with your research. My concern with having these machies in
a school would be that kids might develop a sense of security working
on one and then go out into the real world and use a conventional saw
and have an accident.
Also, I did not consider Kickbacks but I'll bet you are correct.
Forget the cost of the mechanisms. Even if they trigger once a week
your insurer is certain to order you to upgrade as soon as the
insurance contract re-ups. One trip to the emergency room with a
student will buy one heck of a lot of cartridges and blades.
The review I read stated there was a test mechanism you could use to
see if the machine was likely to trigger.
Not yet, but my work is in the risk management field. It is close to
being a metaphysical certainty that the insurers will do this as soon
as they realize that there is an option.
The cost of replacing a table saw with a saw stop is trivial, $3500 is
nothing compared to the cost of a negligence lawsuit. The risk of
injury is clearly very high, the cost of the injury anywhere up to a
million dollars or so (kid loses hand).
If you want to make something happen fast there are two ways to do it,
either you make it an audit requirement or you make it an insurance
In other words "no". I suspect that any insurance company that told a
school district to replace a power tool with another one that was more
costly and didn't work any better would be told that their services would
no longer be required.
This assumes of course that they do not self-insure already.
It is still quite possible to buy a used car that is not equipped with
air bags, or even seat belts for that matter. AFAIK there is no
jurisdiction in the country that has required retrofitting either.
That depends upon where you are. IIRC, Arkansas no longer requires minimum
vehicle safety inspections. In Texas only the law abiding are required to,
everyone else gets a surrogate hundred dollar bill inspected.
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