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Posted: 12/9/2018 8:37:49 AM EDT
so..what saw blade recommendation for a 71/4 skill saw
cutting up some very old galvanized metal roofing for siding on a small shack for my shooting range.. want to use the metal and a combination of pallet wood for siding.. going to be making at least 8 3 ft cuts. this is at least 50 yr old metal,,you know, back when this stuff is like 3" thick.. 
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Posted: 12/9/2018 8:45:57 AM EDT
[#1]
Back in the day we just turned an old blade over backwards and shredded thru it.
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Posted: 12/9/2018 8:47:12 AM EDT
[#2]
Metal cutting abrasive blade seems appropriate.
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Posted: 12/9/2018 8:49:34 AM EDT
[#3]
Use a blade with a lot of teeth on it and put it in backwards
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Posted: 12/9/2018 8:53:02 AM EDT
[#4]
You havea good excuse for a new tool. I have one of those dual saws with two counter rotating blades. That is the saw you need. And they are very handy for lots of other tasks. You can plunge cut with no kick back. And they aren't expensive.
 
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Posted: 12/9/2018 9:00:12 AM EDT
[#5]
Quote HistoryQuoted:
Metal cutting abrasive blade seems appropriate. I've seen mutiple choices...seeking BEST from past experience, longest lasting, smoothest cutting...etc etc.. thanks all!! |
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Posted: 12/9/2018 9:02:51 AM EDT
[#6]
Quote HistoryQuoted:
You havea good excuse for a new tool. I have one of those dual saws with two counter rotating blades. That is the saw you need. And they are very handy for lots of other tasks. You can plunge cut with no kick back. And they aren't expensive. www.amazon.com/dp/B01C702FHG promised the wife this was a 99% scrap project,,,I'm hovering at about 90%....needed screws, roofing paper, one roofing square all the rest has been left over stuff and a few donated items..including the plastic pallets i am using for the floor/base |
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Posted: 12/9/2018 9:08:26 AM EDT
[#7]
 Attached FileA blade like this will rip right through it, just make sure the shaft of your skill saw is the right size. They are only a couple bucks each at HD or Tractor supply or Lowes, they do wear down fast though. wear some gloves and safety glasses the sparks, shards flying off can hurt. Take your time and don't let the blade get hot. The old "just turn the blade around" method worked on aluminum roofing but not for steal. (I could be wrong about that) |
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Posted: 12/9/2018 9:59:18 AM EDT
[#8]
Ive used a diablo steel demon saw blade on up to 1/8" diamond plate; it strugggled a little where the raised bits were but worked fine. $30 at homedepot
Wear ear protection, it is loud as hell |
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Posted: 12/9/2018 10:48:15 AM EDT
[#9]
As posted above, the abrasive blade will work just fine. I just finished wrapping my back wall in my garage with lots of cuts and yes it was also the old heavy gauge corrugated tin. Pulled it off the old barn myself.
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Posted: 12/9/2018 12:06:52 PM EDT
[#10]
Grinder wheel or maybe a jigsaw with a metal blade.
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Posted: 12/9/2018 12:24:12 PM EDT
[#11]
Quote HistoryQuoted:
Ive used a diablo steel demon saw blade on up to 1/8" diamond plate; it strugggled a little where the raised bits were but worked fine. $30 at homedepot Wear ear protection, it is loud as hell
I have cut 4 foot sections of .25 mild steel many times. I use a piece of angle as a guide, some lube and go slow. As said above, very loud and chips go everywhere. I always have an extra on hand.  Attached File |
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Posted: 12/9/2018 12:27:28 PM EDT
[#12]
Don’t forget hearing protection. Cutting steal is very loud.
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Posted: 12/9/2018 12:53:14 PM EDT
[#13]
I have used whatever old blade was in my saw , installed the normal orientation. Just discarded the blade after the project.
Like others say, LOUD! It cuts rather easily, I was surprised. |
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Posted: 12/9/2018 1:51:02 PM EDT
[#14]
Looks like a good excuse to buy an acetylene torch
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Posted: 12/9/2018 1:54:50 PM EDT
[#15]
Buy a good nibbler.
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Posted: 12/9/2018 8:06:33 PM EDT
[#16]
Quote HistoryQuoted: I use them more often than I like to.
I have cut 4 foot sections of .25 mild steel many times. I use a piece of angle as a guide, some lube and go slow. As said above, very loud and chips go everywhere. I always have an extra on hand. https://www.AR15.Com/media/mediaFiles/213346/BD4CA5FE-54BD-4E87-A33D-47816D3E3262_jpeg-766250.JPG No sparks and the steel doesn't get super hot. You don't want galvanized metal to vaporize the zinc, it is poisonous. Don't breathe it in at least.
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Posted: 12/9/2018 9:27:59 PM EDT
[#17]
Thanks Gents
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Posted: 12/10/2018 7:14:50 PM EDT
[#18]
Sawzall.
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Posted: 12/12/2018 5:38:22 AM EDT
[#19]
Quote HistoryQuoted:
Back in the day we just turned an old blade over backwards and shredded thru it. Use a cheapo steel blade though... not carbide. |
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Posted: 12/12/2018 6:50:23 AM EDT
[#20]
Just go to home depot and get a diablo metel cutting blade, theyre cheap and work good.
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Posted: 12/12/2018 7:06:12 AM EDT
[#21]
I’m a commercial roofing contractor, forget using a saw blade, just use a good pair of aviation snips (Snap On makes a nice pair for $25 each and will last forever). If I do have to make a lot of long cuts in steel panels I will use electric or pneumatic shears.
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Posted: 12/12/2018 12:52:30 PM EDT
[#22]
Quote HistoryQuoted:
Looks like a good excuse to buy an acetylene torch |
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Posted: 12/12/2018 6:44:06 PM EDT
[#23]
Quote HistoryQuoted:
Back in the day we just turned an old blade over backwards and shredde wasd thru it. Wear earpro |
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Posted: 12/12/2018 7:35:46 PM EDT
[#24]
PLEASE WEAR EAR PROTECTION WHEN CUTTING WITH POWER TOOLS
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Posted: 12/12/2018 7:58:06 PM EDT
[#25]
I have a Milwaukee metal saw, basically just a circular saw with a trap for metal shavings. It may run at a different speed than a standard wood cutting saw I dont remember. With that and a good metal blade like the diablo I've cut 3x2x1/4" tube steel. Works good and leaves a nice edge. I've cut stainless steel faced foam panels with it, even rebar (toasted a blade, wouldn't recommend using it on rebar).
As has been said. Its loud, wear eye and ear pro. |
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Posted: 12/12/2018 8:03:57 PM EDT
[#26]
A plywood blade backwards will cut it no problem.
If you like buying tools...........  Milwaukee M18 Fuel 2782-20 metal cutting circular saw |
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Posted: 12/13/2018 5:26:22 PM EDT
[#27]
Quote HistoryQuoted:
Sawzall. Sawsall with a good metal blade, stack up a few, cut away. Using a skill saw will leave NASTY, razor sharp barbs. |
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Posted: 12/14/2018 10:05:22 AM EDT
[#28]
Quote HistoryQuoted:
https://www.AR15.Com/media/mediaFiles/413300/saw_blade_png-766083.JPG A blade like this will rip right through it, just make sure the shaft of your skill saw is the right size. They are only a couple bucks each at HD or Tractor supply or Lowes, they do wear down fast though. wear some gloves and safety glasses the sparks, shards flying off can hurt. Take your time and don't let the blade get hot. The old "just turn the blade around" method worked on aluminum roofing but not for steal. (I could be wrong about that) |
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Posted: 12/14/2018 10:10:19 AM EDT
[#29]
Another vote for the Diablo circular saw blades. It is extremely loud, wear ear pro. And will also throw hot bits of steel everywhere-it hurts. I wear a hat, faceshield, jacket and gloves when using it.
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Posted: 12/14/2018 11:03:12 AM EDT
[#30]
Since this thread seems to live on, some pics for inspiration.
I believe OP is talking about this old stuff which is a whole lot thicker than the cheap tin at the big box store. I would be very reluctant to try a regular blade turned backwards when an abrasive metal cutting blade will work much better. This stuff I used was stout. Anyway....  Attached File Attached File Attached File |
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Posted: 12/14/2018 12:54:31 PM EDT
[#31]
Quote HistoryQuoted:
I’m a commercial roofing contractor, forget using a saw blade, just use a good pair of aviation snips (Snap On makes a nice pair for $25 each and will last forever). If I do have to make a lot of long cuts in steel panels I will use electric or pneumatic shears. A powered unit would make it go very quickly. |
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Posted: 12/14/2018 8:58:30 PM EDT
[#32]
Quote HistoryQuoted:
Since this thread seems to live on, some pics for inspiration. I believe OP is talking about this old stuff which is a whole lot thicker than the cheap tin at the big box store. I would be very reluctant to try a regular blade turned backwards when an abrasive metal cutting blade will work much better. This stuff I used was stout. Anyway.... https://www.AR15.Com/media/mediaFiles/261558/DSC02497_JPG-771668.JPG https://www.AR15.Com/media/mediaFiles/261558/DSC02545_JPG-771670.JPG https://www.AR15.Com/media/mediaFiles/261558/DSC02504_JPG-771674.JPG nice work! |
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Posted: 12/15/2018 4:47:33 PM EDT
[#33]
Quote HistoryQuoted:
damn!!!! nice work! Quote HistoryQuoted:
Quoted:
Since this thread seems to live on, some pics for inspiration. I believe OP is talking about this old stuff which is a whole lot thicker than the cheap tin at the big box store. I would be very reluctant to try a regular blade turned backwards when an abrasive metal cutting blade will work much better. This stuff I used was stout. Anyway.... https://www.AR15.Com/media/mediaFiles/261558/DSC02497_JPG-771668.JPG https://www.AR15.Com/media/mediaFiles/261558/DSC02545_JPG-771670.JPG https://www.AR15.Com/media/mediaFiles/261558/DSC02504_JPG-771674.JPG nice work! |
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Posted: 12/16/2018 10:50:36 PM EDT
[#34]
just use an old blade. youre going to trash any blade.
I used 3 old trim blades when we cut overhang back at our place. wear long sleeves, gloves, full face protection, etc. |
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