[Shop-talk] cutting plaster and drywall

[John T Blair]

Don't know if any on you guys have tried to cut plaster and drywall.  Trying to cut through plaster is and drywall, is hell on blades
My wife and I are removing the soffit about the kitchen cabinets as part of our kitchen remodel.  To cut the plaster and drywall I used my oscillating saw (multi tool).  I had some wood and metal cutting blades so I tried them.  Neither one of these lasted 3 ft.  I also tried using my saber saw and went through 2 of those blades in short order.  Plaster is just hell on blades.
I  started researching saw blades that would cut plaster.  The first one I got  was for my Craftsman Saber saw.  I got a DIABLO4 in. 6 TPI Carbide T-Shank Jig Saw Blade for Fiber Cement and Plaster at about $15 ea at Home Depot.  
DIABLO 4 in. 6 TPI Carbide T-Shank Jig Saw Blade for Fiber Cement and Plaster DJT141HM - The Home Depot

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DIABLO 4 in. 6 TPI Carbide T-Shank Jig Saw Blade for Fiber Cement and Pl...

DIABLO's carbide teeth jig saw blades deliver extreme durability and superior cutting life in abrasive materials...
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I bought 2.   Well I've cut out a panel of plastered drywall which required 2 cuts floor to ceiling and then 1 horizontal cut between the 2 studs.  When I finished those cuts, it didn't look used.  I don't know how many more cuts I've made with that blade but it's still going strong.  I really didn't need the 2nd blade.  They are outstanding!!!!
Then I went looking for a decent blade for my oscillating saw.  I went to Harbor Freight and bought 2 Titanium blades.  
https://www.harborfreight.com/1-34-in-bi-metal-reduced-shank-titanium-plungeflush-cutting-blade-for-oscillating-multi-tools-70089.html

They weren't worth squat.  Took the teeth right off of them.
I ended up back at home depot and bought 2 of Dremil's Universal 1-1/4 in. Carbide Flush Cutting Oscillating Multi-Tool Blade (1-Piece) for about $18 ea:
https://www.homedepot.com/pep/Dremel-Universal-1-1-4-in-Carbide-Flush-Cutting-Oscillating-Multi-Tool-Blade-1-Piece-MM485U/206384731
Man, these are the cat's Meow!!!  I don't know how many linear feet I've cut cutting the soffits but I've still on my first blade and it's still cutting great.

I also found a couple of different plaster cutting blades for a reciprocating saws:
https://www.amazon.com/Saf-T-Kut-Reciprocating-Blades-Drywall-2-Pack/dp/B00G3JDGV2/ref=sr_1_10
https://www.amazon.com/Makita-723060-Drywall-Plaster-Reciprocating/dp/B0007ZQ9DU/ref=sr_1_9
 https://www.amazon.com/IVY-Classic-28318-Reciprocating-Bi-Metal/dp/B0052IPHHQ/ref=sr_1_5
Unfortunately, I haven't bought and tried any of these.

JohnT

John T. Blair  WA4OHZ     email:  jblair1948 at cox.netVa. Beach, Va                  Phone:  (757) 495-8229

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