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drewhart 07-13-2008 11:15 PM

sawzall blades
i just bought a dewalt 10 amp sawzall. what types of blades are available and what kind is the best for cutting galvanized pipes. i see some say bi-metal and some have different amounts of teeth.

Marlin 07-14-2008 05:00 AM

Bi metal has something to do with the materials used to make the blade, I don't remember exactly what though. For cutting galvanized you want fine teeth. Wear saftey glasses, galvanized lines tend to send slivers of metal flying while being cut with a sawzall.

AtlanticWBConst. 07-14-2008 05:51 AM

Metal cutting blade = looks like a hack-saw blade.

Cow 07-14-2008 08:27 AM

For galvanized pipe I'd use 18-24 TPI blades.

Alan 07-14-2008 09:28 AM

I think milwaukee, blu mol and lenox are my favorite blades. :thumbup::thumbup::thumbup:

majakdragon 07-14-2008 11:40 AM

Sawzall blades come in metal and wood cutting types. For wood, use larger toothed blades. I would use an 18 to 24 tooth per inch blade for metal pipe. Lennox makes great blades.

Charles 07-14-2008 11:53 AM

It is also usually better to get blades that are a little longer. With a longer blade, it is easier to get a grip on what you are cutting and not loose it.

amakarevic 07-14-2008 12:40 PM

get short (4-5 in) metal cutting blades (small but frequent teeth), unless you really must reach tucked away pipe. the longer the blade, the more it oscillates left-right, which you do not want.

in case you need to cut cast iron, there are special blades for that, which i doubt you can get at a big box, try a specialty plumbing store if need be. but i hope you do not need to ...

47_47 07-14-2008 02:27 PM

I vote for lennox for a quality blade. Minimum teeth per inch is the material thickness multiplied by 1. My preference for the length of the blade is the diameter of the pipe plus the stroke length of the saw plus one inch. Galvanized is very tough on blades, buy extra. As Marlin said wear safety glasses and gloves.

drewhart 07-14-2008 06:34 PM

i may have to cut into a cast iron stack for two vents to enter. so they make long blades for cutting cast iron stacks? or is it better if rent one of those chains for cutting pipe?

DUDE! 07-14-2008 06:40 PM

I rented the chain wrap cutter a couple yrs ago, takes no time at all to cut or "pop" the cast iron pipe. Before doing it a guy told me he used quite a few sawsall blades trying to do the same thing, just make sure you have clearance if the pipe is along side a wall

make sure you do your homework on cutting a stack pipe or it could come down in a hurry.

Marlin 07-14-2008 10:04 PM


Originally Posted by DUDE! (Post 139210)
make sure you do your homework on cutting a stack pipe or it could come down in a hurry.

I toutched on that twice in his other thread.
Their are special abrasive sawzall blades for cutting cast iron. They're not cheap, about $6 each. They do get the job done though.

drewhart 07-14-2008 11:02 PM

i bought these metal ones they took for ever to cut through though. it worked. i forgot how many tpi, the one that says for metal that is between 1/4 and 1/8th of an inch.

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