Drilling can be difficult, especially when accuracy is crucial. Drill bits are designed to cut through a wide range of materials, but they have a tendency to walk off their mark, potentially damaging a workpiece. One way to get more accurate results when drilling holes with a milling machine is to use stub drills. These shorter bits are more rigid, and therefore more accurate, than longer twist bits.

The most common drill bit size is the jobber length drill bit. This style of drill bit is what most laymen imagine when a drill bit is mentioned. One of the difficulties that come with using these bits is the fact that their length makes them susceptible to oscillating, even if those oscillations are not apparent to the naked eye.

Image a drill bit made of rubber or a similarly flexible material. At low speeds the bit might have been able to spin along its axis, but at higher speeds it would begin to flare out away from that axis. Even though it is difficult to see, the same thing is occurring on a much smaller scale when your drill bits reach high speeds. One of the best ways to combat this effect is to use stub length drill bits.

Stub drills are shorter than other bit styles, which in turn make them more accurate. There is less drill bit, so it has less room to oscillate. While these drill bits are obviously more accurate, they are limited when it comes to the depth they can drill. When drilling deeper holes, long twist bits can be used in combination with a spot drill in order to achieve the same levels of accuracy that stub drill bits can provide.

The best stub drills will be machined from solid carbide. Carbide drills have several advantages over tools made from high speed steel and other tool materials. This is because of the fact that carbide is both more rigid and wear resistant than steel alloys. The rigidity of tool carbide will increase the stability of the bit by minimizing its ability to oscillate at high speeds. The ceramic material used in the construction of carbide tools is also more stable at high temperatures, meaning that the edge on your carbide drill bits will not lose their tempering when they are being used for high speed drilling.

If you are looking to order some new stub drills for your shop, you need to check out the tools available from Online Carbide. As an American manufacturer of high quality carbide tools, they produce end mills and drill bits that are designed to hold their sharp edges even when being used for high speed machining. If you have any questions about their tools, or you are interested in placing a custom order for your shop, feel free to reach out to a member of the Online Carbide tema by sending an email to [email protected].