How Does a Mechanical Pencil Operate?
Identification A mechanical pencil often looks more like a ballpoint pen than a pencil. You open it like a ballpoint pen by unscrewing or separating the top and bottom, but instead of changing an ink cartridge, you insert a new thin graphite lead. The pencil contains an internal mechanism which propels this lead through the tip, usually by the user clicking the top or twisting the pencil cylinder. These pencils commonly include a rubber eraser on the end, although it may be hidden under a cap. Most mechanical pencils can be refilled, but some are disposable. Advantages Mechanical pencils create lines of consistent thickness and are often favored for technical drawing and graphic art. Another advantage is that they do not need sharpening, except for those with thicker leads, which are typically only used by graphic artists. Many people prefer mechanical pencils for these reasons, and also because the pencil can be used year after year and does not have to be replaced. Ratchet Style Seve