Hoạt động xuất khẩu (EXP)

Hoạt động xuất khẩu

Hoạt động xuất khẩu (EXP) - HT Drillbits


Drill Bits are a handy tool for boring holes into many surfaces, most specifically wood and metal. Drills bits come in a variety of types, the most common being the twist bit but others common bits include: brad point, forstner, spade, speedbor, auger, and left-hand. Bits come in a variety of steels and coatings. Some of the more common steels are low carbon, high carbon, high speed steel (HSS), and cobalt-alloy steels. Common coatings are Black oxide and Titanium Nitride (TiN).


It is very important to know the differences in steels and coatings when deciding what drill bits to purchase and use. Low carbon steel is good for soft woods, but usage on harder woods and steel can drastically shorten their lifespan. High carbon steel can be used successfully on soft or hard woods and even on metals, but tend to also not last too long, but are decent enough for small jobs. High speed steel is meant for longevity and harder jobs. Due to the higher operating temperature, they may be used at higher speeds. Cobalt alloy steel is what is required for heavy duty jobs. For frequent drilling and harder materials, cobalt will get the job done. It is important to note the amount of Cobalt in the material alloy. Higher Cobalt content makes drill bits harder and allows to withstand higher temperatures.


Coatings are equally important when deciding which drill bit set is needed. Coatings help prolong the life of a drill bit. Black oxide is the standard coating for many drill bits. It is used to provide heat protection and to help the drill bit do its job of sliding into whatever material it is boring. Titanium coatings provide the same benefits as black oxide coatings. However, they are also known to extend the life of a drill bit as much as five times that their counterpart.


Drill bits come in a variety of sizes. The standard metric sizes range from .2 mm all the way up to 25 mm. In the US, number gauges are popular, ranging from 80 (the smallest at .34 mm) to 1 (the largest at 5.8 mm). For bigger drill bits, there are also the letter gauges, A being the smallest (around 5.9 mm) and Z being the largest (at around 10.5 mm).

Whatever size you need, and whatever coating and steel you decide, drill bits will get the job done. Though, it’s important to remember to always use a punch in order to prolong the lifetime of your drill bits and to allow for easier, more precise drilling.

Download specs files

Back to Precision Mechanics