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> Lessons in stupidity, Why not to use a drill press as a mill
TonyAKAVW
post Dec 7 2004, 11:44 PM
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So I have been stuck at home with the chicken pox the last week and a half getting stir crazy when I decide to work on a project. I have this large round piece of aluminum that I need to turn down a bit. Lacking a large enough lathe I decided to mimic a milling machine and turn it down with a half inch end-mill. I fixed up a suitable clamping arrangement and was about half way through the job when the chuck in the drill perss decided to come loose. The exceeedingly sharp half-ich end mill in the now falling (and spinning) chuck found its way to my hand. Many foul words and a decent amount of blood followed. As well as trip to urgent care. So, several stiches later I no longer have a gaping hole between my index and middle fingers, and the two other cuts on my index finger are under control as well.

So the morale of the story is, dont use a drill press as a milling machine. As tempting as it looks, there are some KEY differences. I did get lucky, this thing coulod have hit my hand much worse and caused much worse injury.

I have a renewed respect for sharp hardened steel spinning things.


-Tony (IMG:style_emoticons/default/headbang.gif)
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sixnotfour
post Dec 7 2004, 11:49 PM
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Carefull 10 years ago I had to empty a co-workers fingers out a glove so they could try and reattach them Not a Pretty sight.
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rick 918-S
post Dec 7 2004, 11:50 PM
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Keep an eye on it. You wouldn't want a nasty infection. (IMG:style_emoticons/default/headbang.gif)
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TonyAKAVW
post Dec 7 2004, 11:57 PM
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I started the anti biotics already, and they are going to check it tomorrow as well. They did an X-ray to check for metal fragments. Nothing there thankfully..


sixnotfour: Thinking of that makse me shudder. Maybe I'll build myself some robotic manipulator arms like the bad guy in Spidermand II.


-Tony
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Aaron Cox
post Dec 7 2004, 11:58 PM
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i put a screwdriver through my hand before.... (IMG:style_emoticons/default/ohmy.gif) (IMG:style_emoticons/default/barf.gif)
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nebreitling
post Dec 7 2004, 11:59 PM
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nice story -- thanks for the lesson.

last night i got lazy and worked the dremel cut off wheel without my safety glasses. almost had a nice visit to the ER.


nathan (<---also an idiot)
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Mueller
post Dec 8 2004, 12:09 AM
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ouch.....

I'm picking little metal slivers out of my fingers right now, had a part in my lathe I was polishing and guess it was not as clean as I had thought it was when I touched it to feel how smooth I had it......doh!!!!
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TonyAKAVW
post Dec 8 2004, 12:21 AM
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So I guess I should ask for a milling machine for christmas. I've been thinking about getting one of those ~$500 Chinese tabletop mills since most everything I do is small and I live in an apartment.

I have a Sherline lathe and have looked at their mills, but they are awefully small, even for what I do.

-Tony
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MattR
post Dec 8 2004, 12:21 AM
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okay? (IMG:style_emoticons/default/thisthreadisworthlesswithoutpics.gif)
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TonyAKAVW
post Dec 8 2004, 12:48 AM
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allright, I will take a pic tomorrow at the doctors office whent they check the wound. if I get a chance.

For the time being I'll post a picture of the cutting instrument and my bandaged hand.

-Tony


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ThinAir
post Dec 8 2004, 02:00 AM
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Somehow I knew that someone was going to say this thread is worthless without pictures (IMG:style_emoticons/default/laugh.gif)
The one you put up is more than enough for me. No more details are needed.
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ChrisFoley
post Dec 8 2004, 06:21 AM
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I bought a "collet chuck with holding collar" from Sears a long time ago that attaches to a drill press and hlods up to a 3/8" shank. It eliminates the problem you experienced, but the quill of a drill press just isn't up to the side loads of milling.
I had one of the Mill/Drill units that MSC (and others) sell for about $1200. It worked pretty good, but the lack of a "knee" makes it very difficult to do plunge cuts.
Nothin' beats a good used Bridgeport for allaround general metal working, including using it as a small lathe.
I suppose you'd have trouble carrying one into an apartment though. (IMG:style_emoticons/default/unsure.gif)
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TheCabinetmaker
post Dec 8 2004, 07:48 AM
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I'm a cabinetmaker by profession. I've had several employees lose fingers in various machines. A radial arm saw is the most dangerous. I won't have one in my shop.

BTW, I have a finger and a thumb that have been surgically reattached. Not fun
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Bleyseng
post Dec 8 2004, 08:48 AM
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Has anyone seen the new table saw with the "instant brake" that if something containing more than 50% water touches the blade the saw stops. Works great on a hotdog I saw on NPR. No more than 1/8th' deep cut!
Yep, I hate radial arm saws too!

Geoff
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Root_Werks
post Dec 8 2004, 10:30 AM
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QUOTE(sixnotfour @ Dec 7 2004, 09:49 PM)
Carefull 10 years ago I had to empty a co-workers fingers out a glove so they could try and reattach them Not a Pretty sight.

Eeeeeeeeew! (IMG:style_emoticons/default/ohmy.gif)
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aircooledboy
post Dec 8 2004, 11:43 AM
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QUOTE(Bleyseng @ Dec 8 2004, 08:48 AM)
Has anyone seen the new table saw with the "instant brake" that if something containing more than 50% water touches the blade the saw stops. Works great on a hotdog I saw on NPR. No more than 1/8th' deep cut!
Yep, I hate radial arm saws too!

Geoff

No kiddn'?

That is pretty amazing. (IMG:style_emoticons/default/idea.gif) As a guy who is already more than a few short in the phalages departsment, that is very interesting. I am gonna have to look into that.
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jwalters
post Dec 8 2004, 11:49 AM
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(IMG:style_emoticons/default/ohmy.gif) I had to put a screw driver thru an oil filter once to try and pry it off the engine--I put so much ass on the handle to turn it the filter opened like a beer can and sliced a four inch by 1 inch wide / long slice of pinky finger skin from the big knuckle down to my wrist---peeled it like a banana-------Makes me shudder just thinking about it.... (IMG:style_emoticons/default/headbang.gif) (IMG:style_emoticons/default/barf.gif)
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balljoint
post Dec 8 2004, 12:18 PM
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I have seen my own patella, thanks to a walking speed bump into a sharp edged metal box, it really is amazing how white bone is. It is pretty sad what you have to see or do to yourself before you start using proper safety equipment all the time.

My friend Burt once got a compound fracture on a rafting trip. On the same trip my friend Ned got hurt in a bad way too.
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Aaron Cox
post Dec 8 2004, 12:23 PM
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split my shin open....saw taht bone (IMG:style_emoticons/default/ohmy.gif) when the doc stitched it p, the needle hit thr bone every time! sends a chill up your body! (IMG:style_emoticons/default/wacko.gif)

just thinking bout it sucks (IMG:style_emoticons/default/unsure.gif)
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davep
post Dec 8 2004, 12:32 PM
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You guys are sick, sick I tell you. Now so am I. (IMG:style_emoticons/default/barf.gif)
Lets us all learn from these mistakes.
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