Instead, it is made up of three (sometimes two, depending on the mechanical pencil) prongs. But that tube is not hollow like the barrel. A minuscule tube is inside the barrel, placed on the end opposite the eraser opening. On the opposite end of the barrel is the spring mechanism. The eraser is removable to access the opening for the lead graphite. In this case, a small, metallic dome covers the eraser.
On the eraser end is an opening through which you can put graphite lead. The primary purpose of that barrel is to contain the graphite lead used for writing. Inside the mechanical pencil is a barrel that extends from the eraser end to almost the writing tip of the pencil. That tip is where the eraser is supposed to be, but the eraser is covered. Most mechanical pencils require the user to apply pressure on the end opposite the writing end to activate the spring mechanism. The lead is a thin pillar of graphite, typically just a couple of inches in length. In simplest terms, mechanical pencils work by using a spring mechanism to project lead out of the writing tip. To help you better understand the terms I will use to describe the mechanical pencil parts, here’s my mechanical pencils photo. How Do Mechanical Pencils Work? Diving into the Details As the name suggests, mechanical pencils use machinery to mechanically project lead for writing. Just exactly how do mechanical pencils work is the question I seek to answer in this post.
Have you ever heard of or used mechanical pencils before? You would be shocked to know that mechanical pencils are an older concept than your regular wood-cased pencils.
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