Myasthenia (my-from Greek Î¼ÏÎ¿ meaning muscle + -asthenia á¼ÏÎ¸Î­Î½ÎµÎ¹Î± meaning weakness), or simply muscle weakness, is a lack of muscle strength. The causes are many and can be divided into conditions that have either true or perceived muscle weakness. True muscle weakness is a primary symptom of a variety of skeletal muscle diseases, including muscular dystrophy and inflammatory myopathy. It occurs in neuromuscular diseases, such as myasthenia gravis.
Arbor. The arbor size is standard for each standard size miter saw. For 8-inch and 10-inch miter saws, the standard arbor size is 5/8 inch. Miter saws that are 12 inches require a 1-inch arbor. Retail miter saws are sold with an arbor and bevel. The bevel can be adjusted to cut wood at different angles.
1 Sliding Compound Miter Saw-a compound miter saw that slides in and out from the base. 2  This range of motion allow for cutting wider pieces of materials. 3  Sizes-The most common sizes are 8 1/2in, 10in, and 12in (size refers to the blade diameter). 4  Although larger sizes exist too.