Don't use grinder discs on a router...

[Euclid]

Interesting high speed/slo-mo footage...

 

[Coen]

Yes, and always have a door in front of your pc's optical drive.

 

[Packard]

I'm not sure he is always as careful as he should be.  Check out his dentition.

(I didn't even know you could mount a grinder disc on a router.  I think they have a maximum rpm rating.  I will have to look when I get home.)

 

[Ron B]

And now you see what happens when you exceed maximum RPMs.

Interesting couple-if I were a neighbor I would work hard to stay on their good side.  But I would not loan them any of my tools. 

As my shop teacher said more than once, "You guys could tear up an anvil".

 

[Euclid]

Speaking of anvils, launching them always sounds like fun:


(Don’t try this at home… or, at least, don’t try it anywhere near my home...)

 

[bobtskutter]

They're amusing videos.
I remember my dad mounting a flapping wheel into a router when was a child.  The flapping wheel shaft bent at 90degrees when the router was turned on.
My dad also told me a story about someone he new using an air powered hand held grinder where the governor failed and the disk over-sped.  The disk exploded and very nearly cut the operator in half.
I've broken a large patio door window when using a miter saw, the saw hit a nail which then bounced into the window and smashed it.
I've also been hit by a stone thrown up from a rotary lawn mower, very painfull.

There are huge amounts of energy stored in high speed rotating equipment.
We should watch these videos and think "wow, what if the tools I'm using failed.  How can I get hurt?  What am I going to do to avoid getting hurt?"

Normally the answer is "don't stand in the line of fire".

Stay safe,

Bob

 

[Bob D.]

You are right Bob, one of my favorite questions when getting to doing
a new or infrequently performed task is: "What could go wrong?"