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Goofs & Blunders You Should Avoid.

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brino

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#91
I put one of those wooden shed kits together a number of years ago. During the build I kept checking each 2x3 as I pulled them from the stack and rejecting the ones that were bowed/warped/twisted.

The shed turned out great, however, in the end I was left with a pile of rejects and nothing else to build the door with!
The twisted ones would have worked fine for the walls, just not for the door.
I did the best I could with the lumber that was left and ended up needing several "toggles" between the two doors and at the top of each door just to keep the doors mostly mouse-proof.

I could have fixed it afterwards by buying more wood, but instead I left it as a constant reminder to think thru the operations from start to finish during the work.

I still have to turn several toggle to open that shed.
My wife says it feels like going thru Maxwell Smarts apartment door.

-brino
 
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Wreck™Wreck

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#92
I put one of those wooden shed kits together a number of years ago. During the build I kept checking each 2x3 as I pulled them from the stack and rejecting the ones that were bowed/warped/twisted.

The shed turned out great, however, in the end I was left with a pile of rejects and nothing else to build the door with!
The twisted one would have worked fine for the walls, just not for the door.
I did the best I could with the lumber that was left and ended up needing several "toggles" between the two doors and at the top of each door just to keep the doors mostly mouse-proof.

I could have fixed it afterwards by buying more wood, but instead I left it as a constant reminder to think thru the operations from start to finish during the work.

I still have to turn several toggle to open that shed.
My wife says it feels like going thru Maxwell Smarts apartment door.

-brino
Sorry about that Chief.
 

george wilson

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#93
No,mine are fluted all the way up
to the distance a normal twist drill would be fluted. They are HSS,not carbide. Their sides are ground into a relief too,just leaving the "margin" touching the edges of the hole they are drilling.

I have not seen them for sale anywhere,which seems too bad because they would be useful drills to have. I guess now days no one would know what to do with them.
 

Silverbullet

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#94
Not me, but at the shop today a guy running 80" long 5" X 1/2" steel bars in a 4020 Fadal mill using 3 vices to hold them, these machines have removable panels on each end of the enclosure, he had them off.
After one end is done it rapids towards the front to make it easier to move.

The part sticking outside hit a steel roof coloumn and rotated the machine, it weighs 10,500 Lb's. Made quite the racket.
Where's the pictures , that must have been scary as bell.
https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwia-bC5laHOAhXI8x4KHdLWBCsQjRwIBw&url=http://www.dirwww.com/2011-fadal-vmc-4020-ht-cmc-vertical-machining-center.html&psig=AFQjCNH1heYeTPARhJD4InSj0Tc7CdmQ0w&ust=1470173531584744
 

Wreck™Wreck

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#95
No pictures, it happens very quickly, that machine rapids at 200 inches per minute which is quite slow by 2016 standards, modern machines of this size will rapid at 1000 inches per minute or more.
 

Tony Wells

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#98
Yeah, I've heard that....something about a needle and a bulldozer.;)
 

AlbertNakaji

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This doesn't apply to experienced folks, but for newbies (we were all newbies at one time): Don't adjust the crossfeed dial (to whatever amount) and expect that it'll remove that exact amount. I did that many times, thinking there was something wrong with the machine, until someone explained to me that there was something called, "tool spring". Perhaps it's not too bad with really stout machines, but for "normal" home shop size lathes (and milling machines, perhaps), tool spring can account for quite a bit of "error".
 

RJSakowski

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This doesn't apply to experienced folks, but for newbies (we were all newbies at one time): Don't adjust the crossfeed dial (to whatever amount) and expect that it'll remove that exact amount. I did that many times, thinking there was something wrong with the machine, until someone explained to me that there was something called, "tool spring". Perhaps it's not too bad with really stout machines, but for "normal" home shop size lathes (and milling machines, perhaps), tool spring can account for quite a bit of "error".
I think there is a corollary to Murphy's Law which states " on a final pass, whatever you set the feed advance to be will actually be doubled'.
 

Jimsehr

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I think the new guys can get hurt on the drill press because they don't fear them. And the part spins as they break thru part. If part not clamped down.

Also see new guys leave a small dia bar hanging out of back of lathe under power and bar bends. Acts like a weed eater.

Jimsehr
 

francist

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Yep, that reminds me of something my old boss did many years ago. Was coming on springtime and he was gearing up to set his boat back in the water and do a bit of fishing. Figured the line on his salmon reel was kinda old, so maybe replace it. Well, that was just going to take way too much time unspooling it by hand, why not chuck a bolt in the drill press and take the line off on onto that?

Fortunately I wasn't there, but his son said the yells for HELP from the shop could be heard down the whole valley. It started off nice, of course, but the more line the bolt took on, the bigger the diameter so the faster it unspooled the old Peetz reel. And you know, a salmon rod is kinda long, so by the time you figure out what's going on you realize that you're the only thing holding that rod and you're dang near eight feet away from the OFF switch with no way of letting go!

Son said his dad's eyes were as big as dinner plates when he got there to turn off the machine....

Poor guy, he died rather young but was like a father to me for the years we worked together. And he makes for a good story now and again, yes?

-frank
 

george wilson

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I heard about a high school shop student who got killed on the drill press. He was trying to drill out one end of a lead ended old fashioned auto battery cable. Not properly clamped down,and lead is not the safest stuff to drill! The cable swung around and hit him on the elbow. He bent over with the pain,and when the cable came around again,it hit him in his head,killing him. This happened pretty fast.

Thank heavens I never had an accident happen in 6 years of teaching shop. Bet that teacher got sued.
 

george wilson

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Here's another one: I had become friendly with a student while doing my student teaching at a high school. The next year,I was teaching shop(mostly because I wanted access to the machinery after hours). The student had come to the shop that night and was using the table saw. He called out to me"Hey,I've figured out how to tell if the teeth on the blade are facing the right direction; just put it on so the brand name is on the outside,where you can read it". I was busy at something,and did not pay much attention to him. A few minutes later,smoke was coming out of that saw in VOLUMES!!!! And,he was STILL trying to push the wood through!! He had put the brand name on the outside,but the teeth WERE BACKWARDS!! So much for his theory! You'd at least think that a LITTLE THOUGHT would tell you which way to put the blade on!!!:) I guess I had thought he was smarter than he was.
 

xman_charl

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had my right middle finger cut open below the skin. 1 inch scar.

supervisor put me on an unfamiliar machine, had two grinding wheels for
sharpening end mills. Showed me how to operate it, needed the parts done.

Have used the regular grinding machines for stuff, one wheel.

So forgot to turn off, one of the wheels, reached in to remove part.

Nurse is always there at this factory, so thats where I went, for care.

as I worked there for 6 years,
recall 3 or 4 employees, their fingers where cut completely off.

Charl
 

dulltool17

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Back in high school metal shop..1975...cutting a v-groove in a drill press vise jaw on a horizontal mill. 45 RPM, climb milling. We used old-fashioned oil cans for cutting oil and I was "thumb-pumping" oil ahead of the cut. The class joker, Henry, came up behind me and says "hey, Wilhelmi- why don't you stick the tip of the can in the cutter and see what happens?" Sure enough, that was enough distraction- I ended up getting the spout into the cutter- pulled my hand through and cut the tip off the third finger on my left hand. Scared the crap out of the shop teacher- more than me. Two years later, I had to have CRS chips excavated from 1/8" below the end of the finger. I always wondered how my middle and index fingers went unscathed; all I can think is that I pulled my hand out so fast that I ripped the tip off the third finger as it was running through the cutter.
 

silence dogood

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Back in high school metal shop..1975...cutting a v-groove in a drill press vise jaw on a horizontal mill. 45 RPM, climb milling. We used old-fashioned oil cans for cutting oil and I was "thumb-pumping" oil ahead of the cut. The class joker, Henry, came up behind me and says "hey, Wilhelmi- why don't you stick the tip of the can in the cutter and see what happens?" Sure enough, that was enough distraction- I ended up getting the spout into the cutter- pulled my hand through and cut the tip off the third finger on my left hand. Scared the crap out of the shop teacher- more than me. Two years later, I had to have CRS chips excavated from 1/8" below the end of the finger. I always wondered how my middle and index fingers went unscathed; all I can think is that I pulled my hand out so fast that I ripped the tip off the third finger as it was running through the cutter.
Did that kid get expelled? I had something similar happened to me. I was routing a piece of wood and the neighbor thought it would be funny to unplug the router while I was using it. I explained to him not very nicely that when someone is using a machine, any machine, to stand back, keep your mouth shut, until the machine is completely shut off. The good thing is no one got hurt. No one should distract a person whom is busy operating any kind of machine.
 

Tony Wells

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Speaking of things pulled through milling cutters, I lost a nice 6" scale.....chopped up into little pieces because I was raking chips away from the cutter. Bad idea.
 

JimDawson

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Speaking of things pulled through milling cutters, I lost a nice 6" scale.....chopped up into little pieces because I was raking chips away from the cutter. Bad idea.
I'm glad I'm not the only one who has done that:faint: Forgot all about it until you posted

Also wound an acid brush around a cutter.
 

RJSakowski

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At a company that I worked for some years back, one of the production workers needed a hole drilled but the machinist was not in. He selected a drill bit with a Morse taper shank and chucked it in the drill press. As he started drilling, the drill started to wobble and came flying out. It hit a concrete wall leaving a fairly respectable divot. Fortunately no one was injured in the escapade and production workers were henceforth barred from using the machine shop.
 

Joe_B

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OK, here is one you would never suspect. Don't hook the ground clamp to the edge of your welding bench. If you lean forward , the clamp will slide off the end of the bench and find a new clamping spot in a very vital area. Don't ask me how I found this out.
 

T Bredehoft

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Don't try making a compressed air storage tank from an old water heater tank. I saw one fly around the weld shop, hit the wall, broke a window, hit the ceiling, came back down, hit the guy having it welded, broke his left arm in two places. Welders were hence forth forbidden to work on 'government' work.
 

AlbertNakaji

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When its -40* don't lock your keys into your vehicle, always have a spare key in your wallet...in case you do.
Was having problems with my electric windows and door locks on the truck. Repairman came over, fussed with it, and said the door locks were fixed. To demonstrate, he pushed the button to lock the doors and they locked. He then closed the door.....with the keys in the ignition.
 
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