![]() ![]() ![]() The diameter emblem shows how wide or deep a hole is meant to be.Ī builder interprets these designs based on the information provided in these designs.Ī counterbore symbol defines counterboring operations, while a countersink is for countersinking fastening operations. In technical drawing, this symbol was formed by taking the side view of the countersink and counterbore holes.īoth symbols are used in drilling designs. The symbol of a counterbore has been likened to an incomplete square with an opening at the top. ![]() What does a counterbore symbol look like? When you think about it, looking at a countersunk hole from the side, it resembles the letter V. What does a countersink symbol look like?Ī countersink symbol resembles the letter V. It is often side by side with the diameter symbol and accompanied by a numerical value. Here, the character of a countersink and a counterbore is duly represented. In a building or house plan drawing, symbols are used to convey information faster. Symbols represent basic protocols in drawing, design, or mathematics. It is not only against drawing protocol but will also make your work clustered. With characters, there is room for dimensional consistency and tolerance of specifications.Īlso, it is much faster and even easier to write the symbol of material or quantity instead of spelling it out with actual words on a drawing. In drawing or design, symbols are used as a representation of the actual material or technique. With countersinking, all your screws can have the same depth. On the other hand, countersunk holes have different styles because of their different angles. Use it when you don't want the fixture's head, or screw the bolt forward from the HDI surface you are working on. The counterbore is typically used for a single purpose whileĬountersinks, due to their different angles, have other purposes.Ī counterbore is often similar to a small coaxial hole enlargement, while a countersink is a conical version. It is important to note that when working with a wooden surface, if you fail to countersink first but end up forcing the screw into this surface, not only will the wood's stability and strength be compromised, but your work will consequently be an eyesore.īecause the wood fibers will crack and become dented if not wholly damaged, it is much easier to counterbore a wooden surface because counterboring does not require precision and accuracy in the angles.Īlso, in a counterbore, all the hole needs are a screw with a flat underside or a socket head that can fit with the surface or washer. While the only angle applicable to a counterbore is a vertical zero degree, it is just as effective as a countersink. However, the most frequently used degrees are 82, 90, and 100. It includes 60, 82, and 90 degrees standard sizes alongside the less popular 100, 110, and 120 degrees. Now, a countersunk hole may come in different sizes of angles. The practice of making a countersunk hole is known as countersinking. Similarities and Differences Between Them The hole formed has a flat bottom, allowing a screw or fastener with a flat underside to fit.Īlso, the instrument used to create this feature is known as a counterbore. This hole allows a flathead screw or fastener to fit correctly once installed.Ī counterbore is more of a cylindrical flat-shaped hole. Let us learn how to effectively fix the PCB without worrying about falling off or loosening the accessories.īefore comparing them, let's highlight what a countersink and a counterbore are.Ī countersink is a cone-shaped hole that is bored into a PCB. Therefore, the similarities and purposes are significant to understand the difference between the two holes. They are so diverse that ignorance makes using one instead of the other hazardous. The countersink and counterbore are holes that require different types of specific fixtures. It is why we need to understand the working principles of each of them entirely. Often, we confuse a countersink for a counterbore and vice versa. These holes include an open pit, a countersunk hole, a blind hole, and a counterbore hole. When working with an HDI board or even a conventional PCB (Printed Circuit Board), holes must be screwed shut. ![]()
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