When You Don't Read, Understand, and Follow Users Manual

[Corwin]

Alex, it looks like you have an answer for everyone & have all the technical information to prove it.  I think the thing that gets everyone replying to your comments so much is the amount of sarcasm you use which i feel is un called for.  It looks like you are looking to start an argument just for the heck of it, or am i the only one that thinks this ?

Woodguy.

I have to agree with your assessment.  [sad]

 

[jmbfestool]

Alex, it looks like you have an answer for everyone & have all the technical information to prove it.  I think the thing that gets everyone replying to your comments so much is the amount of sarcasm you use which i feel is un called for.  It looks like you are looking to start an argument just for the heck of it, or am i the only one that thinks this ?

Woodguy.

I have to agree with your assessment.   [sad]

I also agree!!

 

[jmbfestool]

A 110v or 230v current won't do that either. Those currents are also too 'soft'.   [cool]

It isn't the voltage that does the damage; it is the current in the arc flash. Same principle as an arc welder or plasma cutter.

With the house wiring's copper having a resistance less than an ohm (1.8 ohm/1000 ft) and a supply of 120 volts, the amperage during a dead-short can exceed 200 amps for a fraction of a second. I have experienced a dead short with a high enough instantaneous amperage to trip my main 200 amp breaker before it tripped the 20 amp branch circuit breaker.

That is true, I have experienced this myself too once. Arcs with a high amperage can exist for a fraction of a second. But lets stick to this particular situation where we're not just talking about a possible arc, but also about a fast moving blade. First off, actual arcing is rare in the case of a short circuit. Most of the time there is no arcing at all because there's metal on metal contact. An arc only comes to life when it suddenly decides it wants to travel through air and the metal is close enough. 

But for an arc to do damage to a metal is has to strike a spot and make that spot so hot that a structural failure at that spot becomes reality. That means it has to make it so hot that it either melts or becomes weak enough to be ripped apart by the force of the collision. But, in this particular case of a blade that's spinning with a rate of a good 5000 rpm even a fraction of a second means the electric arc is spread over an  area and not just one spot. The TS55 is rated at 2000-5200 rpm which in the lower case means it makes a good 30 revolutions per second and in the higher case around 85 revolutions per second.

If you've used the standard 48 tooth this means that per second 85 x 48 = 4080 teeth pass a fixed spot. So in the rare case of an actual arc existing it has exactly 1/4080th of a second to make the metal so hot that it will somehow fail. And then take in consideration that we're not talking about standard construction steel but about especially hardened steel of the blade, superior HM steel in the teeth, and a superior weld that holds blade and teeth together, then we're talking about a minute chance on actual damage. A chance that's in the order of getting hit by plane on your way home or something exceptional like that. It does happen sometimes, but it's one of those rarities you can't take into serious consideration.

Well My hammer was moving at a very fast rate when I was hitting the plaster of the wall above a door (Who runs a cable straight centre of a door then across the wall and down the side of the door then across again I had no I idea a cable was their!)

Any way my hammer was a Est wing Hammertooth which has a pretty straight claw which is good for removing plaster quickly. 

Well any way at a very fast rate properly my arm was moving 100mph back and forth and BANG my hammer went back and I lost a 5mm piece of metal of the tip of the claw. Well the chances of a cable running above a door is very small the speed I was hitting with my hammer the chances of a arc all very small but it happened! I had a damaged hammer!

Just cant believe it! I worked it out to be a 1 in 10000000000  chances for that to happen unfortunately it was the 1.

JMB

 

[Rick Christopherson]

---->> Rick himself said there was no damage.

Well, I believe Rick already performed this experiment for us .......... and you know the answer.

You really don't want to pull me into an electrical argument unless you are 100% sure I am going to agree with your stance....and right now, those odds are looking pretty thin...........I'm going to get back to cleaning the workshop now.  [wink]

.

 

[Chems]

I did the same thing. Although I did it with a ?20 Homebase PowerBase CS. Lifted it up off my home made guide rail and the horrible plastic cord coiled up and went into the blade. Made some excellent arching sparks.

 

[Jim Becker]

D'oh!!!!!!!!!!!!!!!!!

 

[nickao]

Once I cut a cord framing and the cord stuck to the blade and I could not pull it off. It seemed melted to the blade. When I finally did get it off it took a piece of the blade with it. I am not sure what this means, just that it took two hours of time getting a new cord and blade. I always carry spare cords now. 

 

[Ken Nagrod]

...SO RICK, HOW'D YOUR ARCWELDED WOOD TURN OUT?   [eek]

After talking with some Ryobi engineers, they feel this could have been prevented if your TS55 had Sawstop blade brake technology.  It would have only put a scratch in your cord and stopped cutting within 3/700,000 of a hot dog.

 

[hasslefactor]

And the award for:

Most Rolling On The Floor Funniest Forum Post Of The Year goes to....

Ken!!!  [laughing]  [laughing]  [laughing]

 

[Ken Nagrod]

Thanks Laurie!  Hope you didn't get injured.  So do I win a cordless TS 55?

[thanks]

 

[Corwin]

...  So do I win a cordless TS 55?

[thumbs up]