Diameters range in size from 6mm to 36mm, or ¼ inches to 1½ inches. Paddle or spade bits have a sharp pointed flathead, removing large amounts of chips. As self-feeding “forces” cordless drills to maintain speed, torque may be a challenge. This makes them quick and easy to use, as you don’t have to worry about keeping the bit steady. Self-feed drill bits are so named because they feed themselves into the material as you drill. Since it doesn’t have any flutes, you’ll need to pull it back periodically to clear the dust and chips. Self-Feed BitĪ self-feed drill bit, similar to the sawtooth, has a threaded end that pulls the bit through the wood swiftly. The teeth cut into the end grain, preventing the bit from skating across the surface. When boring into end grain, sawtooth bits are the preferred choice. Versatile for a variety of purposes, they can cut multiple overlapping holes. Invented for gunsmiths, they create flat-bottomed holes apart from a small indentation. Most commonly found in drill presses and lathes but can also be utilised with hand-held tools. Forstner Bitįorstner wood drill bits can drill larger diameter holes in timber than other tooling can. This allows you to quickly and easily place wires in tight spaces. Electricians use these long, skinny “bell hanger” bits for pulling wires or similar installation work.īesides their long length, they have a hole near the tip for use with pulling wire. Installer drill bits are a specialised bit to install difficult wiring. Suitable for unusually thick applications, they will cut through nails without tool damage. Ship auger bits are a particular type of tool included in this category. It is possible to use with an electric drill, though it will pull through at an alarming rate and no control, better off in a hand brace. They feel more rigid and robust, making them an excellent option for tougher projects. It is 18 inches long, so it can go deep into timber. The auger drill bit is perfect for drilling through tougher materials. They also offer a more energy-efficient solution. Augers produce cleaner holes than regular woodworking drill bits. The auger drill bit has a threaded tip that can cut a large deep hole. With a clean cutting action, it is ideal for precise dowel holes in wooden workpieces, with sizes between 3 – 13mm. A (lip and spur) bradpoint centres itself, so you don’t have to worry about drifting. The cutting action is clean and sharp, preventing splintering on the exit hole. Woodworkers know that the best for hardwood and softwood is a brad point drill bit. This allows for greater accuracy and stability when drilling. A Brad-point wood drill bit has a sharp point to position the workpiece with two spurs for cutting.
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