Choosing a Right Drill Bit for Metal, Wood, Tiles, Glass, or Masonry

Isn’t it becomes tougher for you when you start drilling huge holes which are greater than 1 ½ inch? It would become impractical as you would need a drill with a tremendous amount of power and torque to overcome friction to drill through the timber. Drilling large holes can also be accomplished with a hole saw.

Drill Bits

Why are titanium coated drills used for metal?

Titanium drill bits are high- speed drill bits (HSS) which have a titanium oxide coating. They are tough and corrosion resistant. They have a much high tendency of cutting as compared to the regular HSS drill bits, and they are useful in cutting any metal, metal sheets or metal rods.

Drills used for masonry

Drill bits that can easily drill through concrete are called masonry bits. They are suitable for drilling through brick and stone. Limited access drill rigs with tungsten carbide tip are the strongest, when it comes to solid concrete, the sharper the drill, the better it will function. Masonry bits cut through concrete in two steps.

The main reason that the tip of the drill is larger in diameter than the shaft below is that when the shaft receives the hole, it fits right inside it. Drilling at a lower speed is more useful for drilling through concrete. These drill bits come in a range of standard lengths and wall plug sizes.

Masonry bits with a carbide or durium tip intended explicitly for hammer drills as they are more efficient and penetrate hard surfaces better and faster.  If you are going for a more robust job, then regular drills may not be the best choice, but any drill is used with standard drill bits for masonry work.

Masonry drill bits look like HSS bits but are usually silver in color. They may have a tip that is a different color to the rest of the bit, showing that it has been especially hardened. These masonry bit are used to drill through stone, brick, solid concrete and breeze blocks.

Drill bits used for wood?

  • Spade or a flat wood bit
  • Lip and spur (brad point) bit
  • Hole saw
  • Masonry Bit
  • Step Bit

HSS bit

Spade wood bit
Preferred during rapid drilling through wood and are commonly available in sizes from ¼ inch to about 11/2 inch. The disadvantage of spade bits is that they  produce a splintering effect as bit emerges from the timber, if you apply too much pressure on it.

Lip and spur bits

They are the used for drilling timber and are available in sizes from 1/8 inch to 5/8 inches. They are used for drilling soft plastic and are less likely to cause melting at the edges of the hole due to friction, which can happen when drilling with HSS bit.

Hole Saws

Hole saws are used to drill large hole which has small teeth like  handsaw, and the blade which  is in the form of a cylinder. Some holes saws are only designed for drilling wood while other versions are made from HSS steel and are suitable for drilling iron or steel.

Drills used for glass and tiles

  • Spearhead bit: Made from tungsten carbide. When drilling glass, lay the drill flat on a soft cloth or newspaper for support. They have an arrow shaped head and is made from tungsten carbide.
  • Diamond Tipped or coated bits: They only have a short lifespan and are used until the coating of grit wears away.

So, your drill is the most versatile tool that you use and you should drill holes with ease and precision.

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