Gotta love it when you cut yourself in middle of working with some machinery. I was overhauling an 1hp AC motor that weighs like 30lbs. Got the rotor spinning real slow by hand and caught my finger between its cooling fan and motor frame. It sheared off about 1/4" square of top skin from my index finger, but it's still attached. The rotor couldn't have been going faster than a few RPM. The solid steel rotors in AC motors have got some serious inertia. I don't want to know how bad it will hurt if the motor was running on power when you get a finger caught between its cooling fan(moves more air than 120mm computer fan and blades are made of metal) and motor housing. I'm sure it has got enough power to completely shear off few fingers. When it is powered, it runs at 3450RPM and draws 15A from 120V outlet. If you worked on cars and motors bigger than wussy computer fan that runs off of 12V up to 1A, you probably have experienced something like this one time or the other. The rotor on a 10hp 3-phase 480V motor is like gigantic flywheel.
ow my finger !
- Thread starter Jerboy
- Start date
Summon the scroll!!!
No, but seriously that must hurt like a motherf....
Losing fingers is something I really would NOT like to happen.
No, but seriously that must hurt like a motherf....
Losing fingers is something I really would NOT like to happen.
- Nov 27, 1999
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A girl who went to my Jr.High got large portion of her hair pulled out from a scalp when her hair caught in a industrial size drill press or a router. The shop teacher told us the story and we never really seen it happen. My shop teacher also told us that the shop teacher before him cut his finger off with a table saw(rather common accident, unfortunately).
Have you guys ever heard of people getting sucked into prnting press machine? I don't know if it's something that ever happened in real life, but that has got to hurt.
Anyways, to tell you exactly how I got my finger caught, I was finished with overhaul and was giving it a quick spin on its shaft with my finger to ensure bearings aren't seized up. This motor has some serious starting torque and combine that with heavy rotor, one side of this thing lifts off the ground as you turn it on. If you hold it while holding it in hands, it recoils like when you shoot a gun.
My Jr. high woodshop teacher told me that story too. I think it's standard practice for woodshop teachers to tell that to their students. Hell, I told it to my students when I taught woodshop one summer.
These dye factorys have huge horizantily mounted cylinders sort of like in a printing press and many presurized vertical cylinders with chemicals etc. etc. well one of the workers thats incharge of the massive power regulator for the different machines was standing across from the rollers .Imagine a set of rollers 3 to be exact kinda like a offset press and a huge transparent polycarbonate sheild slides over and off them for protection thoose are automated by the machine and come up rather fast that makes it even scarier well i didnt work there so i had no clue what the hell the machine did or how the hell it turned on ,especially the god dam shield the machine whirled up instant creating this massive suction he lost balance and fell backwards onto it only the mere tip of his head tocuhed it but it was enough his instinct was to pull foward but all it did was but his weight in the front.Hes the slash and the 0 is the roller \0 <--- so he leans off it and the machine pulls all the skin along with other stuff from his necks base up to his face eventually the machine got a thick bundle of nervs comming of the spinal cord and ripped out half his spinal cord he just dropped dead in this horrible awkward position.there was so much blood and it wouldnt stop comming.
ohhh my God that's incredibly disturbing Saftey. Sorry Jerboy about your finger. You'd think that it was going so slow it wouldn't do so much damage!
It doesn't hurt that bad. Fingers are something we take forgranted aren't they?
I took a razor blade and cut off the little piece of skin that was still attached by one end. I figured it was better to cut it off than have it sit on top of my wound and encourage the growth of bacteria in-between.
No there wasn't any warning label about rotating parts. I guess it is making an assumption that people know this better. It is a commercial duty motor and isn't meant for dumbest consumers.
maybe I should sue General Electric and whine "they didn't put warning label on it and I didn't know it can hurt me cry cry cry"
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