How And What Types Of Drill Bits Are Used?

Update:18 Nov 2022

How and what types of drill bits are used?

1. Auger bit

Drilling large holes in wood and thick plywood requires more force than a twist drill. Ideally, augers are used for this purpose without applying unnecessary pressure; for ideal results, they should be driven at low speed but with high torque (preferably 600 rpm). If you're using a drill with a two-speed gearbox, make sure it's engaged in the lower speed range. This will provide more torque and increase your control while drilling.

As a reminder, drilling with an auger bit may give you dirty results because when the tip of the bit starts to bite into the wood, it pulls the remainder into it, causing the wood to splinter. However, this can be avoided by putting a piece of "paint tape" where you want it before drilling the holes. Starting the drill slowly (low speed) will also give a cleaner edge, once you get below the top of the material you can speed it up.

2. Shovel position

Spade drills, also called spade drills or paddle drills, are designed for drilling deep and fairly wide holes with power or cordless drill. While the drill is flat, the specialized tip is designed for clean, quick starts.

Spade bits can develop backside breakage (also known as "blowout") when you approach the bottom of the hole while walking away from the workpiece during use, however, it can be placed behind your workpiece by using a sacrificial backplate.
One thing to note is that spade bits require more torque than twist drills, and they are not recommended for angled holes if you are not an expert, as doing so can be difficult.

3. Glass/tile drill bits

As the name suggests, these bits are used to drill holes in ceramic, glass, and tile. The tips of these bits are made of hard tungsten carbide. Hand drills can be used to operate glass/tile drills, however, electric drills work well at low speeds.

Due to the rigidity of carbide, use a lubricant (water is recommended) to keep the tip cool and cut while minimizing dust. Also, glass drills are not as easy to sharpen once dull due to the hardness of the tip material, but whetstones still do.

4. Titanium alloy drill bit

These bits are great for drilling through plastic, wood, and metal faster. They last longer than other types of drill bits, and the titanium nitride coating is responsible for this. In addition to being responsible for its durability, the coating also ensures that materials such as aluminum do not stick to the drill.
After prolonged use, they may darken and may not be usable unless repainted. However, it is recommended to replace them rather than repaint them.