The stratosphere (/ËstrÃ¦tÉËsfÉªÉr, -toÊ-/) is the second major layer of Earth's atmosphere, just above the troposphere, and below the mesosphere. About 20% of the atmosphere's mass is contained in the stratosphere.
The chainsaw is a highly effective and efficient tree and branch cutting power tool. It works with an engine, referred to as a power head; powering a metal chain, driven by a centrifugal clutch, with a chain moving around a groove in the guide bar at fast speeds.
Besides the blade, the most important part on a table saw is the fence. If yours is beat up or you just want a new one, here's how you can build your own. Table saws are precision tools for ripping lengths of wood, and to achieve this they a properly dialed-in fence to align the wood parallel to the blade for perfect cuts. If your fence is out of whack, you can spend a few hundred dollars buying an aftermarket one. Or you can build your own out of wood and a few pieces of hardware. In this video, YouTube woodworker John Heisz builds a table saw fence from pieces of 1/2-inch plywood and easy-to-find hardware items.