I believe they're called anti-nodes. The points of the wave where the amplitude changes the most. Since they reverse, I don't think there's a different name for the high spot â¦ or low spot.
A jointer may also be used to flatten the face of a board, in which case the sole focus is to produce a flat surface on the face of the board and the fence is not used. This procedure is often performed prior to edge jointing so that the board has a flat reference face for subsequent operations. jointer that is used for rebating has the outside ends of its blades also sharpened and set with a small clearance from the cutter head. A jointer cannot be used to create a board of even thickness along its length.
Washers are used for multiple purposes when mechanical parts are assembled. Here are some usages : Some washers have a special design that attempts to help keep the nut and/or bolt from coming loose. Known as a lock washer these may be a split ring type, star type, wavey or any one of a number of other designs. A lock washer will be used with the part of the assembly that most likely could turn such as the nut. It could be used under the bolt head in instances where the bolt screws into threads in one part of the assembly. A washer is sometimes used to protect the surface of the assembled parts.