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Jan 30, 2023 · 1. Twist Drill Bit. The twist drill bit or twist bit is the most common bit used for making holes in wood, and it’s what probably comes to mind when you think of a drill bit. Twist bits have a cylindrical shape, a sharp point, two cutting edges, and two spiraling flutes that remove material from the hole as it turns.
- Twist Drill Bits. These are general purpose drills, and we use them to drill plastic, steel, and wood. The angle of a twist drill is such that they cut steel rather well, but you can drill holes in wood as well.
- Dowel Drill Bits. Also known as lip & spur wood bits, these bits have pointed center, and cutting edges which take angles in the opposite direction. The function of the pointed center is to keep the drill centered, so it does not wander off during drilling.
- Flat (Spur) Drill Bits. These bits have a “spur” (also called “brad”) and a lip. You can easily identify the drill bit as it has a unique shape. We use spade bits to create larger holes in wood that exceed the normal diameter of the drill bit that you can fit into the chuck of a power drill.
- Brad Point Drill Bit. You may also come across wood drill bits that resemble metal drill bits. In such a case, the difference is more subtle – the material used will be softer, and the bit may be differently colored or marked.
- Twist Drill Bit. This is the type of bit that probably comes to mind first when you hear “drill bit.” It’s the most common type of bit and used for general purposes around the jobsite and home.
- Brad Point (Bradpoint) Wood Drilling Bit. This wood drilling bit’s distinguishing feature is in the name. The sharp point on a brad point bit helps position the bit for a precise hole.
- Spade Bit. Spade bits have a broad, flat area for boring larger diameter holes in wood. The spade bit has no flutes so you may have to back off the bit as you go when drilling deeper holes.
- Auger Bits. You’ll immediately notice a threaded tip on auger bits. This type of wood drilling bit uses the tip to quickly pull the bit through the wood.
- Twist Bit. Twist bits, also known as twist drills, are the most commonly recognized drill bits and are distinguished by their cylindrical shank and helical flutes.
- Pilot Point Bit. Pilot point bits are an advanced version of twist bits, designed with a small, non-cutter point at their tips. This point helps to keep the bit centered when starting the hole, reducing bit walking and ensuring a precise location.
- Spade Bits. Spade bits, also known as paddle bits, are characterized by their flat, paddle-like appearance. The flat, broad shape features a pointed tip to aid in positioning and two cutting spurs at the edges that help create clean hole borders.
- Auger Bits. Auger bits are designed for precision and deep drilling, featuring a screw tip that starts the hole and pulls the bit through the material, which results in less pressure being required from the user.
- Twist Bit. This is the most basic type of drill bit that often comes packed with a drill itself. Twist bits are easy to recognize based upon their cylindrical shank and loose corkscrew shaft.
- Step Drill Bit. A step drill bit is conical in shape and looks like a dull arrowhead with stair steps cut into to the untrained eye. However, in practice, these unique drill bits allow a user to gradually increase the size of an existing hole without needing to attach a new drill bit.
- Forstner Bit. Forstner bits, named after Benjamin Forstner who first patented the design, are bits that are suitable for making relatively large flat-bottom holes.
- Masonry Bit. On the surface, a masonry bit looks like a twist bit with a similar shank and shaft. However, these bits instead feature a hexagonal tip that makes them ideal for drilling through brick, concrete, and stone when used in a hammer drill.
Drill bits for wood have a sharp point for boring holes, as opposed to standard bits that are blunt on the end. Drilling in wood requires precision so the wood won't shatter or splinter. The drill bit should go in straight, using a steady pressure. If you go in on an angle, you could splinter the wood, and if you drill too fast, the wood can burn.
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Aug 22, 2024 · Determining the RPM for a wood drill bit depends on the type of wood being drilled. For hardwood, the RPM should be lower than for softwood. Additionally, if the drill bit is larger, the RPM should be low. The RPM is also determined by the type of drill bit used. Even drill bits of the same diameter can have different RPM requirements.
