What Is a Pencil Grinder?
A pencil grinder is an electric pneumatic grinding tool.
Also called a micro grinder, it is a handheld tool featuring a pen-shaped tip for performing grinding work. Since pneumatic grinding uses pneumatic pressure, the grinder is connected to a hose tube and can be connected to various attachments based on processing needs.
Pencil grinders are suitable for extremely fine machining operations. For example, they are very useful for grinding the surface of fine parts. They are also suitable for processing hard materials and can be used not only for grinding but also for cutting and polishing operations.
Additionally, they can be used for a variety of machining operations because of the wide variety of tools to which they can be attached. Tools such as grinding wheels, abrasives, and cutters can be mounted. Being easy-to-use, versatile electric pneumatic tools capable of fine processing work, pencil grinders are used in a variety of industrial fields.
Uses of Pencil Grinders
Pencil grinders are used for mold machining, deburring, rust removal finishing and correction, polishing and chamfering, engraving, and patterning. Because they are hand-held, pencil grinders are suitable for detailed processing work and can handle complex shapes.
The high-speed rotation prevents unevenness in grinding and allows for high-precision finishing. For this reason, they are widely used as one of the indispensable tools in the metalworking field.
In operations such as deburring and rust removal, the tool contributes to the improvement of product quality because it can finish the machined area smoothly. Furthermore, in polishing and chamfering operations, the high-speed rotation makes it possible to finish the work quickly. Engraving and patterning operations can be performed to the finest detail with extremely high precision.
Principle of Pencil Grinders
Pencil grinders are connected to a power source, which rotates the tool at high-speed to perform grinding and cutting operations.
Pencil grinders are mainly powered by air pressure, so they are used by connecting a tube directly to an air compressor or the like. The tool consists of a pen-shaped body and a tip to which the tool can be attached. The part to be gripped by the hand is made of rubber or other material to prevent slipping and enhance the gripping effect.
Since the tool operates under high speed rotation, it is less prone to uneven sharpening and can be finished with a high degree of precision.
Types of Pencil Grinders
There are three main types of pencil grinders: air pencil grinders, electric pencil grinders, and battery-powered pencil grinders. Depending on the application, the appropriate pencil grinder must be selected.
1. Air Pencil Grinder
Pencil grinders operate by air pressure, and are rotated by supplying air from an air compressor or similar device. They are compact, lightweight, and capable of delicate processing, and are used in a wide range of fields such as mold processing, jewelry making, and dental work.
2. Electric Pencil Grinder
These pencil grinders operate using a power source and are structured like an electric drill. Compared to air pencil grinders, electric pencil grinders produce less vibration and more stable rotation. They have high processing capacity and can be used for processing and correcting automotive parts, model making, and other applications.
3. Battery-Powered Pencil Grinder
These pencil grinders operate on a rechargeable battery and have a structure similar to an electric pencil grinder. Since they do not require a power cord, they are suitable for moving around the work site or for outdoor work. They can be used in mold making, crafts, DIY work, etc.