What's the Difference Between Drill Bits for Wood, Metal, and Stone?

When you need to buy a quality drill bit, you have certainty: high-speed steel is a solution for important use. But there are several alternatives to consider, there's not just one type of holder: for example, do you already know that there is a difference between drill bits for wood, iron, and walls? A preview is necessary: the shape is fundamental.

If you need a good drill bit, you can choose a model based on the qualities of High Speed Steel, and you just need to take a look at the Krino catalog to discover that this solution has several nuances. There are many basic HSS bits but also other options like HSS-R, then there are HSS-E and HSS-Co bits. What are the qualities and differences between bits for wood, iron, and stone?

What Is HSS, High-Speed Steel

Let's start with a generic definition, a starting point for outlining the various declinations for purchasing appropriate tools. HSS (high-speed steel from the English High Speed Steel) is a highly resistant alloy, designed to maintain hardness and sharpness even when reaching high temperatures during cutting or drilling work.

For this reason, high-speed steel is particularly widespread in the creation of end mills, drill bits, and saw blades of different types. The common denominator among these tools: high speed, a context in which HSS performs its best.

Also because inside we find tungsten, molybdenum, chromium, vanadium, and often cobalt: these are elements that confer hardness and wear resistance even at particularly high temperatures. Which are generated, precisely, when operating at high speed.

How Many Types of Drill Bits Do We Have?

As anticipated, there are several solutions that can compose a drill bit (or a blade, a saw) in HSS. It depends on how the alloy was composed and whether there is a coating. A first difference concerns rolled or ground bits.

Already the workmanship can impact the quality of the product. But today we want to deepen the difference between drill bits for wood, stone, and iron. Namely, 3 of the main types of solutions for drilling based on the High Speed Steel product that now dominates all catalogs of professional cutting and drilling tools. Let's explore the topic together.

Bits for Wood

Let's start with this typical tool for drilling only this type of material. It is strongly discouraged to use the wood bit in other circumstances, also because the shape is very particular: there is a wide spiral that allows wood chips to be expelled easily and a central point that allows you to start drilling without imprecisions. There are several alternatives.

There are spade bits for smaller holes, augers for large ones, and Forstner bits in case blind drilling is required. Such as for mounting hinges on cabinet doors. There are also single-flute Lewis bits, perfect for carpentry work. Cup mills, instead, adapt to the needs of those who need to make large holes in wood with precision.

Bits for Stone

If you want to drill reinforced concrete, you need to use not only specific bits but also appropriate drills. Percussion drills are required. Bits for drilling bricks, stone, walls, and concrete have the structural characteristics to operate in this direction. Also in this case, we can absolutely confirm that it is not possible to use stone bits on any other occasion (unless we're talking about universal bits or those designed for dual use, rotation and rotary percussion).

This is not so much because of the material of the drill bit, always HSS steel, perhaps with titanium nitride (TiN) coating: what makes the difference is certainly the head of the bit, which is characterized by the presence of hardmetal inserts.

Bits for Iron

Among HSS drill bits, those for metals and ferrous alloys are certainly the most anticipated and important. Because it's important to work with appropriate tools to face the challenge par excellence: drilling extremely hard metals. And with noteworthy results.

Therefore, bits of this type are HSS and in some cases feature titanium coatings or cobalt percentages to improve wear and heat resistance. The shape, compared to other bits, presents a regular spiral with always equal sharpening on the profile. The cutting angle is approximately 118°-135°, for gradual and precise penetration. Just as you prefer.

Other Bits for Specific Materials Like Glass

There are not only bits for metal, wood, and stone: you can also count on other solutions such as spade bits for glass: these are options that allow you to make holes in these very fragile materials without breakage. All this can also be applied to ceramics, tiles, porcelain stoneware. In summary, anyone working with construction needs these tools.

These bits have a structure made of tungsten carbide or hardmetal, materials that are extremely wear-resistant and able to work on delicate surfaces. The characteristic spade shape allows for precise drilling to penetrate glass without surface damage, all this is achieved thanks to another solution: a structure capable of drilling without applying force.

Universal Bits, Useful but Not Always

In addition to individual bits dedicated to stone, metal, and wood, we can count on a series of products, also present in the Krino catalog, that allow you to work without particular problems on various forms of structures. These are universal bits that adapt well to metal alloys, various types of wood, plastic, ceramics. Among Krino's famous all-purpose bits, we have options that allow you to work without particular problems on various materials. Such as steel, cast iron, walls, concrete, ceramics.

Not to mention everything related to wood, plastic, laminates. These are solutions that work well when you don't have particular requirements and can manage drilling by bypassing certain parameters. Clearly, if you require maximum precision on demanding jobs, the choice is forced: you must work with specific bits for wood, iron, stone, and also glass and ceramics.