The method that a radial arm saw uses to cut wood fifers from any other style of power saw. To make a cut completely through the stock you are cutting, you will have to cut into the surface of your radial arm saw table top. Depending on how often you use it, your radial arm saw table top will eventually need replacement. Usually the radial arm saw table top is made of cheaper material like ply wood or particle board just because of the replacement issue.
It is not feasible to make an opening for the cut the radial arm saw makes into the table top due to support issues. Radial arm saws are not designed to make only perpendicular cuts, but to be able to swing through ninety degrees of cutting angles. To insure that your cut is accurate the stock you are cutting needs to be fully supported and if you have an opening below it for the full arc of the blade cutting range, there will not be enough support to hold the wood steady during your cuts.
The fence that hold your stock in place during the cut will have to be replaced more often than the table top. Making cuts with a radial arm saw requires cutting through the fence unlike other saws. Having a radial arm saw in a small woodworking shop can give a lot of versatility to an experienced user. A radial arm saw can make all the basic cuts you need to make in shaping your wood to your needs for any project.
One of the difficulties in using a radial arm saw is to hold the stock firmly in place during the cut. Using end stops and clamps to hold the stock is not as feasible as it is on a table saw sled. Unless you can design a workable method for placing movable end stops and movable clamps, the main method for holding stock in place is your hands. With proper care in the use of your radial arm saw, your radial arm saw table top will last for many years of use.
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