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Long Drill Bits for Wood

When it comes to woodworking, the importance of having the right tools can't be overstated. One tool that often assumes great significance is the drill bit. In particular, long drill bits for wood can prove invaluable for specific tasks, enabling you to drill deep and precise holes. This article aims to provide a comprehensive understanding of the different types of long drill bits available for wood, their uses, and guidance on how to choose the best one for your needs.

The Basics of Drill Bits

Before delving into long drill bits, it's important to understand what a drill bit is. A drill bit is a cutting tool used in drilling machines to create cylindrical holes. The drill bits are held in the drill, which rotates them and provides axial force to create the hole. The best drill bit for a job often depends on the material you're drilling, the type of hole you want to create, and its size.

Why Long Drill Bits?

Long drill bits are specifically designed for drilling deep holes in various materials, including wood. They're exceptionally useful for projects such as furniture making, where precise deep holes are often required for dowels or bolts. Moreover, long drill bits can reach areas that are otherwise inaccessible with standard drill bits.

Types of Long Drill Bits for Wood

There are several types of long drill bits suitable for woodworking. Each has its unique characteristics and applications.

Auger Bits

Auger Bits

Auger bits are a type of long drill bit that are ideal for drilling deep holes in wood. They feature a spiraling shaft with a threaded tip that helps pull the bit into the wood, making drilling easier and more efficient.

Auger bits usually range from 6 to 30 inches in length, and they're excellent for creating clean, precise holes. They also have a wide flute for removing wood chips, which helps prevent the bit from getting stuck.

Forstner Bits

Forstner Bits

Forstner bits are not typically as long as auger bits, but they can still reach lengths of up to 10 inches. These bits are perfect for drilling flat-bottomed holes, overlapping holes, or holes on the edge of the material.

Forstner bits cut precise, clean holes and are often used for creating holes for hardware installation or inlays in woodworking projects. However, they require more power to operate than most other bits and can be harder to control due to their aggressive cutting edges.

Brad Point Bits

Brad Point Bits

Brad point bits, also known as W-point bits, are excellent for precise, accurate drilling in wood. They feature a central point that allows for accurate positioning and a peripheral cutter that slices through the wood.

While not typically as long as auger bits, brad point bits can still reach lengths of up to 12 inches. They're great for tasks that require precision, such as doweling or creating holes for shelves.

Spade Bits

Spade Bits

Spade bits, also known as paddle bits, feature a flat blade with a pointed tip. They can reach lengths of up to 16 inches and are a cost-effective choice for drilling large, deep holes in wood.

However, spade bits tend to produce rougher holes than other bit types. They're best used in situations where the finish of the hole isn't critical.

Installer Bits

Installer Bits

Also known as bell hanger bits or fishing bits, installer bits are designed for pulling wire through the drilled holes. They can reach lengths of up to 18 inches and feature a small hole at the bit tip to attach the wire.

These bits are perfect for installing wiring or small cables through wooden studs in walls or floors. They're not designed for precise, clean holes, but rather for functional, utilitarian purposes.

Choosing the Right Long Drill Bit for Wood

When choosing a long drill bit for wood, consider the following factors:

  • Material: Ensure the bit is designed for use with wood.
  • Length: The bit should be long enough to drill the required depth.
  • Diameter: The bit diameter should match the size of the hole you want to drill.
  • Type of Hole: Different bits create different types of holes. Choose the bit that fits your requirements.
  • Drill Compatibility: The bit should fit into your drill. Check the shank size and type.


Long drill bits for wood are invaluable tools for anyone involved in woodworking. They allow the creation of deep, precise holes that are often necessary in woodworking projects. By understanding the types of long drill bits available and their uses, you can choose the right one for your specific needs and ensure the success of your project. Remember to always use these tools with care and follow all safety guidelines to prevent accidents.

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