Sheet Metal Shear usage - lessons for all of us.

General tips/tricks/tools that could be utilized on any platform.
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SCOTTRODS
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Sheet Metal Shear usage - lessons for all of us.

Post by SCOTTRODS » Thu May 21, 2020 8:16 am

So I have been doing sheetmetal for work and as a hobby for years (Since I was a teenager, and I'm 55 now), and today, I was just chatting with one of my coworkers about how no one seems to know how to use Aviation snips, and he went on to tell me the Green handled Snips I had in my hands, were left hand snips. I have always called them by the "waste side", and was shocked to hear him say he was a journeyman sheetmetal mechanic for 15 years... I only worked in a sheetmetal shop making Chimney flashings custom for about 7 years so I just left it at that, and got curious how my knowledge had slipped over the years, so i went to youtube to find evidence of his knowledge and found, mine was more correct... He was also rudely adamant, that He knew it all and was completely against everything I said... So... You tube lent me this video, and I want to share it with you guys, as I know most of the VW guys I know are really sharp people who like to know how to use and build and adjust things as correctly as possible. I am a tool whore of sorts and don't like to abuse tools (most times). I watch people use files to Rub on stuff and it makes me cringe, and seeing someone use a pair of Channel lock pliers backwards kills me! Not to mention the ones who don't know proper use of an adjustable wrench (Which is why I recommend if you don't know how, use the proper sized wrench instead) Take a watch for 5 minutes... worth the watch seeing an Old Timer (REAL JOURNEYMAN) show how it's done... (how I was taught).

Tin Snips


Thanks for reading...
I have found them completely missing more than once. - PILEDRIVER

Some pics of My Powder Coating work
http://s244.photobucket.com/albums/gg6/terrellster/
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Ol'fogasaurus
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Re: Sheet Metal Shear usage - lessons for all of us.

Post by Ol'fogasaurus » Thu May 21, 2020 10:26 am

IMG_2189 copy.jpg
I have a set of three of them, one for the left cutting, one for the right hand cuts and one for straight ahead. The grip color is an indicator while the shape, side the cutting blade is on are different.

There are also air powered shears also.

Lee
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Ol'fogasaurus
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Re: Sheet Metal Shear usage - lessons for all of us.

Post by Ol'fogasaurus » Thu May 21, 2020 7:11 pm

https://lifehacker.com/aviation-snips-a ... 1684150936

Since I forgot I got curious and found this. It determines what the color in the handles mean.

Lee

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Tom in PA
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Re: Sheet Metal Shear usage - lessons for all of us.

Post by Tom in PA » Thu May 21, 2020 7:52 pm

Thanks for the vid. I've given up on caring about which way an adjustable is used after seeing many videos of them being used/abused the right and wrong way without a significant difference in outcomes. I still do mess up the tin snip thing to this day so hopefully this can get me out of the dark for good on the subject:-)

Bruce.m
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Re: Sheet Metal Shear usage - lessons for all of us.

Post by Bruce.m » Fri May 22, 2020 2:28 am

Ol'fogasaurus wrote:https://lifehacker.com/aviation-snips-a ... 1684150936

Since I forgot I got curious and found this. It determines what the color in the handles mean.

Lee
did you watch the you-tube video posted above?
According to it, the colour coding has nothing to do with cutting in a curve. It determines which side of the cut stays flat and which side curls up (the waste side).
All of which was news to me but makes perfect sense & partly explains why I’ve always made a rough mess with snips.

Ol'fogasaurus
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Re: Sheet Metal Shear usage - lessons for all of us.

Post by Ol'fogasaurus » Fri May 22, 2020 9:43 am

Bruce.m wrote:
Fri May 22, 2020 2:28 am
Ol'fogasaurus wrote:https://lifehacker.com/aviation-snips-a ... 1684150936

Since I forgot I got curious and found this. It determines what the color in the handles mean.

Lee
did you watch the you-tube video posted above?
According to it, the colour coding has nothing to do with cutting in a curve. It determines which side of the cut stays flat and which side curls up (the waste side).
All of which was news to me but makes perfect sense & partly explains why I’ve always made a rough mess with snips.
That is weird! I Iooked up the the shears using the same search and got below. I then hit this URL and all I got was what you see below plus a picture of the shears... but no video:

"Cutting curves in sheet metal is difficult. The material is awkward and unforgiving, as well as extremely sharp. There are three types of aviation snips that are designed to make three different cuts much easier.
Yellow handled snips are made to cut in a straight line. They can also cut wide curves and are ideal for flat pieces of metal. Green handled snips are designed to make straight and right (clockwise) cuts and are perfect for right handers cutting duct. Red handled snips cut best straight and to the left (counter-clockwise). You can use any of the snips in either hand but they will only perform well when cutting in the direction they were intended for.



Look for offset snips as they keep your hands up and away from the sharp metal and always wear leather gloves when handling and cutting metal and aluminum. Milwaukee makes a great two-piece set, and this three-piece set from Wiss is extremely popular. For lower budgets, this three-piece set from Tekton is only $14."


The other thing that was weird was that it wouldn't let me copy the dialogue until I finagled things around. Sorry about the problem.

Lee

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Tom in PA
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Re: Sheet Metal Shear usage - lessons for all of us.

Post by Tom in PA » Fri May 22, 2020 7:23 pm

The video seemed to make a lot of sense. I didn't realize snips were only designed to have 1/4 inch or so of waste. That explains why I've struggled in the past...

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SCOTTRODS
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Re: Sheet Metal Shear usage - lessons for all of us.

Post by SCOTTRODS » Sat May 23, 2020 7:24 am

Tom... that was one of the first things I learned when we hit the Sheet metal in A&P school too. There's a tool for cutting a sheet to the size you need. It ain't aviation snips... LOL I wish I had a Beverly throatless shear, but I make do with a pair of standard Shears and a 52 inch Stomp shear.
I have found them completely missing more than once. - PILEDRIVER

Some pics of My Powder Coating work
http://s244.photobucket.com/albums/gg6/terrellster/
My Facebook Page for Powder Coating
http://www.facebook.com/profile.php?id=100001788886297

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GS guy
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Re: Sheet Metal Shear usage - lessons for all of us.

Post by GS guy » Sat May 23, 2020 2:48 pm

My good buddy Bill! Bill did most of the welding on my chassis and is a crack welder and very gifted general fabricator. He's the kind of guy you want to take in (and memorize if possible!) every snippet of knowledge he cares to share whenever you're around him - super nice guy too. Always has some cool race car or hot rod stuff going on in his shop. He lives about 15 minuted down the road from me. Bill has more talent with a torch and hammer than most of us can do with a box full of tools! You should see his Batmobile! :-)
I now see I've been mis-using my aviation snips all this time - trying to hack my way through sheet metal like they are some kind of hand shears.
Jeff

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SCOTTRODS
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Re: Sheet Metal Shear usage - lessons for all of us.

Post by SCOTTRODS » Sun May 24, 2020 7:08 am

GS guy wrote:
Sat May 23, 2020 2:48 pm
My good buddy Bill! Bill did most of the welding on my chassis and is a crack welder and very gifted general fabricator. He's the kind of guy you want to take in (and memorize if possible!) every snippet of knowledge he cares to share whenever you're around him - super nice guy too. Always has some cool race car or hot rod stuff going on in his shop. He lives about 15 minuted down the road from me. Bill has more talent with a torch and hammer than most of us can do with a box full of tools! You should see his Batmobile! :-)
I now see I've been mis-using my aviation snips all this time - trying to hack my way through sheet metal like they are some kind of hand shears.
Jeff
You've gotta believe that Bill has seen you use shears and is what I deem a very wise man. A wise man will just watch and let things be. Sometimes you just have to do that, maybe not to hurt a guy's feelings, or sometimes to make sure you don't leave others thinking you "know it all"... and maybe other reasons at times... but knowing "when" and "when not" is the wise man's thing. I felt it in my best interest not to argue with a guy who professes to be a "17 years long Journeyman Sheetmetal mechanic". I know I'm getting old and sometimes mis-remember things, but some people don't know that about themselves... or never was what they claim. We also have a "Journeyman Welder" at the shop, that I believe is an *OK* welder... Since I have never been a welder I bow to that. But since I *HAVE BEEN* a Sheetmetal tech for several years and also have some formal training with the tools...I decided to check into my memory... and it was correct this time.Basically be aware that the word "Journeyman" is a smartazzes way of telling you they are smarter than you... even though they are not.

There are also different quality of snips for different brands. WISS used to be the go-to brand around here... but lately I have found a few sets of these in shops (where I work) that are almost new and won't "grab" the metal to allow you to maneuver and cut properly. I am left believing they're possible Chinese made for WISS.

I am kinda interested in a couple of brands I have seen some info on - Stubai which if you spend the time can get them all over the place, and Freund or Erdi Can be had fairly easily. I kinda see them all as "Luxury" tools at this point, since I have an older set of WISS snips. But If I were going for some offset models, I would definitely consider these 3 brand names.
I have found them completely missing more than once. - PILEDRIVER

Some pics of My Powder Coating work
http://s244.photobucket.com/albums/gg6/terrellster/
My Facebook Page for Powder Coating
http://www.facebook.com/profile.php?id=100001788886297

Ol'fogasaurus
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Re: Sheet Metal Shear usage - lessons for all of us.

Post by Ol'fogasaurus » Sun May 24, 2020 10:06 am

This has turned out to be an interesting post string for general "how to" information. I finally figured out where the Video was :roll: :lol: and watched most of it. It is interesting to see the view from the manufacturing side of the house, not just the engineering side of the house. The final outcome is supposed to be the same but it is the getting there that is often the difference.

I've had the shears I posted pix of for so long I don't remember where I got them from but it could have been from HF. A lot of the tools you get now days (as if you didn't know) originate from off-shore which is not to say they are good or bad but just the same with different brand names applied.

Good posting string guys!

Lee

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