Girz0r

iTrader: (1)

Joe Perez

iTrader: (8)

That's just painful to watch...


I owned the second-cheapest angle-grinder sold by HF for about ten years. Wasn't using it in a production environment, obviously, but I treated it pretty roughly. The handle finally broke, prompting me to get rid of it. I should have opened up the gearbox for inspection, but didn't think to. By the end, it was still making the same horrible rattling noise that it had made since the day it was new.


Angle grinders, in general, seem to be hard to kill.


Grinding / cutting discs, by comparison, appear to explode with some regularity.


Click the links to see images of people with gruesome facial, neck and head injuries from exploded angle-grinder discs, including three in which a significant portion of the disc (like half) is still embedded in the jaw / face:


https://www.miataturbo.net/attachmen...ine=1445615307


https://www.miataturbo.net/attachmen...ine=1445615307


https://www.miataturbo.net/attachmen...ine=1445615307


https://www.miataturbo.net/attachmen...ine=1445615307


https://www.miataturbo.net/attachmen...ine=1445615307


https://www.miataturbo.net/attachmen...ine=1445615307


https://www.miataturbo.net/attachmen...ine=1445615307


https://surgeonsa.files.wordpress.com/2012/12/1-4.jpg


https://www.miataturbo.net/attachmen...ine=1445615307


https://www.miataturbo.net/attachmen...ine=1445615307




I wonder what it would take in terms of PPE to protect your face and neck from an exploding grinder disc? I doubt those full-face plastic shields would do much to stop half a cutting wheel traveling at a gazillion miles per parsec.

czubaka

iTrader: (3)

Dirty kitteh and the boiz?

Monk

iTrader: (3)

This is me from now on when I use my angle grinder.

sixshooter

iTrader: (12)

**** that. I'm throwing mine away now. Did not need to see that.

Braineack

iTrader: (62)

i cant even use a dremel without injury.


remind me never to use an angle grinder ever again.

aidandj

iTrader: (5)

I bought a full face shield. I don't use my angle grinder without it. **** that.

Braineack

iTrader: (62)

But now I know @y8s truly loves me. cause he gave me his face shield last time I borrowed his grinder -- and i used it.

mgeoffriau

iTrader: (7)

How does this happen if the wheel guard is still in place?

Joe Perez

iTrader: (8)

That the thing, though. I question the efficacy of a flimsy sheet of clear plastic when tasked with a relatively heavy fragment travelling faster than rumors about the TSE turbo kit.

I'm sure they're great for protection from sparks, dust, and things like that. I'm not so sure they'd stop a bullet or half a grinding wheel.



Ricochets, holding the grinder at an odd angle (we've all done it), disc deforms during fracture and comes out the bottom, etc.

Joe Perez

iTrader: (8)

When the US government decided to throw beavers out of airplanes, for science.

(Sounds like a Cave Johnson idea.)

Braineack

iTrader: (62)

i was totally about to post this on your FB page today! but got distracted

aidandj

iTrader: (5)

Borrowing a raptor 1200 motor controller. I have some special sauce lithium ion batteries. Going to get a cycle analyst computer.

Then see if I can do wheelies without breaking things.

End goal is be able to register it as a neighborhood electric vehicle and drive it to work....doing burnouts.

aidandj

iTrader: (5)

Joe P has a facebook? I would kill to be friends with Joe P.

Savington

iTrader: (31)

I bet the face shield does more than you think. The grinding wheel weighs almost nothing, and it weighs about 1/3 of nothing when it breaks into small chunks after exploding. The face mask is going to move a lot when something strikes it, since it's not firmly bolted down, so as a worst-case scenario, the shard would embed in the plastic pretty firmly.

I've had the pleasure of using a 20,000rpm grinder that some dimwit put a 16,000rpm wheel into. The ensuing explosion had my shop partner and I (this was in college) doing one of those "Am I bleeding profusely" pat-downs afterwards. We never even found the individual pieces from that wheel - it was like it just vaporized. I keep lots of name-brand grinding wheels at the shop and I throw away any wheel that even looks like it might be a little iffy.

Guardiola

iTrader: (1)

I've had end mills break at 10000rpm that were stopped by a 1/8" polycarbonate window on the machine. Like Sav said, they bury themselves in the plastic. It is a gnarring/melting event.
Also, the curvature of the face shield would probably help deflect debris to the sides.

good2go

iTrader: (2)

( jump to 3:20 for aidandj's role )

Joe Perez

iTrader: (8)

And yet, you did not.



There's far less pony on my FB page. It's pretty boring, in fact. You guys get most of the good stuff here.

Braineack

iTrader: (62)

Girz0r

iTrader: (1)

SPACE

http://astro.vm.rub.de/ - Huge image of the milky way