![]() Review: Metabo-HPT C3607DWA Circular SawĪside from the saw, you need a couple of carpenter’s pencils and a combination square to both mark the lumber and guide the saw for accurate crosscuts. ![]() But if you expect to make more difficult cuts such as plunging through an interior floor, frame out your basement, or cut pressure-treated lumber, opt for a pro-duty cordless or corded circular saw. ![]() Homeowner-grade cordless saws have enough power to cut 2 x 3 and 2 x 4 lumber, pine planks, and plywood. With manufacturers working so hard to develop cordless tools, you also may wonder if these are the best fit for you. A homeowner working with a pro-level circular saw may find it too heavy and be unable to take advantage of its speed and power. While it’s true that pro saws cut faster compared to homeowner saws, their most important attribute is durability. Contractor saws start at 10.5 pounds and go up from there.īut a contractor-grade saw may not help you get the job done faster, believe it or not. The average homeowner-duty saw (with a motor drawing 12 amps) weighs 8 to 9 pounds. These features promote durability but increase the saw’s weight. The saw rides on a larger, more damage-resistant shoe and is equipped with a big, tough trigger switch, larger and tougher bearings, and a thick but highly flexible cord. Corded models have motors that draw as much current as 15 amps. Contractor-grade saws can have the blade on the left or the right of the motor. If you’re ambitious, you might want the same saw the pros use. When the blade is fully lowered, the saw cuts to about 2.25 inches deep (or slightly deeper). With a few exceptions, most of the blades are 7.25 inches in diameter, positioned on the right side of the motor. Save for the rear-handle saws we cover, the tools that we tested do not exhibit much design variation. The Best Circular SawsĬircular saws are powerful tools that crosscut wood (cut across its grain) and rip it (cut with the grain). Read on for quick info on the best circular saws from our testing, then scroll down for buying advice and in-depth reviews of these and other models. From there, consider how you like to work, and make an informed selection. Using our data, look at the circular saw’s performance, its price, and its physical characteristics, such as its weight and whether it’s corded or cordless. Our advice is always the same regarding our recommendations: Your goal isn’t to buy the most powerful tool or the least expensive, but the tool that’s the right fit for you. Our favorites below range from budget-friendly models, to pro-style machines that any contractor could use to frame a house. Here at Popular Mechanics, we constantly test and use circular saws in our own projects. Bottom line: the circular saw is the best tool for fast and accurate cutting. Plus, with a little practice, they’re easier to use than you might think. Sure, there are alternatives like hand saws and jigsaws, but they don’t come close in terms of efficiency and versatility. In contrast, filamin phosphorylation is due to a soluble kinase stimulated only by cyclic AMP (Ka = 3 x 10(-7) M) and not by cyclic GMP or Ca2+.If you need to cut a large amount of lumber or plywood, or to break down lots of hardwood pieces to feed through a table saw, you’re going to need a circular saw. Phosphorylation of both proteins is stimulated by cyclic GMP (Ka = 3 x 10(-8) M), cyclic AMP (Ka = 3 x 10(-7) M), and to a lesser degree by Ca2+. Both proteins and the kinase responsible for their phosphorylation appear to be membrane-bound. Cyclic GMP stimulated phosphorylation of two particulate proteins, G-I (Mr = 130,000) a protein previously described by Casnellie, J. We have compared cyclic AMP and cyclic GMP effects on phosphorylation in smooth muscle. Purified vas deferens filamin can be phosphorylated by purified cyclic AMP-dependent protein kinase. Cyclic AMP stimulated this phosphorylation, whereas cyclic GMP and Ca2+ had no effect. Incubation of particulate fractions of vas deferens with ATP resulted in 32P-labeling of filamin. Intact vas deferens incorporated orthophosphate into filamin. We have studied the phosphorylation of filamin in a mammalian smooth muscle, the guinea pig vas deferens. Filamin is a high molecular weight actin-binding protein found in large quantities in smooth muscle and other non-muscle cells.
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