A hole saw with a carbide edge works on heavier materials such as ceramic tile and masonry. Some smaller hole saws have a built-in shank and don't use a pilot bit.Ī bi-metal hole saw cuts through wood and metal. The arbor also holds a pilot bit for centering and steadying the cutting blade. Typically, a hole saw attaches to an arbor or mandrel which includes a shank. ![]() A hand-held drill may not always give you the force or control you need to use a Forstner bit, so a drill press is a better option for some applications.Ī hole saw drills large holes - such as for installing door hardware or creating a pass-through for wiring. A hole saw creates a plug of waste material a cut-out in the side of the saw cylinder allows you to push it out. Pull the bit out regularly to clear away chips and dust as you work. ![]() A point helps you to position the bit precisely on the workpiece. The design also allows you to overlap holes. If you need to bore through the workpiece, it creates a neat exit hole. You can use it to create flat-bottomed holes - such as for receiving dowels. Some spade bits have points at the two edges that help create a neater hole and exit point.Ī Forstner bit bores smooth, clean holes in wood. It has a flattened blade with a sharp point that helps position and steady the bit. Spade BitĪ spade bit, also known as a paddle bit, bores large-diameter holes - up to 1-1/2 inches in diameter - in wood. It doesn't have the standard flutes of a twist bit, so you need to pull the bit back periodically to clear away chips and dust. Like the auger bit, a screw at the tip helps position the bit and draws it through the work piece. An auger bit with a hollow center provides even more chip removal, allowing for deeper boring one with a solid center is stronger and more rigid.Ī self-feed bit bores through wood. As with the brad-point bit, large flutes help remove chips and dust. The flutes - grooves that wrap around the bit and channel away chips and dust - are extra-wide to remove more material.Īn auger bit, another type of wood-boring bit, has a screw tip that starts the hole and pulls the bit through the workpiece to quickly create a clean hole. ![]() The brad at the center of the bit tip helps position the bit precisely for accurate drilling and produces a clean exit point in the workpiece. A twist bit is the most common type of drill bit for home use. It works for general-purpose drilling in wood, plastic and light metal.Ī brad-point bit is designed for boring into wood.
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