What is the difference between drill bits

There are multiple wood drill bits depending on the type of drilling you want to achieve. When you delve deeper in wood drilling, you will get the different drill bits such as the lip and spur drill bits. These are special drill bits only meant for drilling in wooden objects. The main feature of the lip and spur drill bit is that it is a spiral bit.

This means that holes that you make in any workpiece will have the spiral pattern too. Another common type of wood drill bit includes the spade drill bit. They are often used for making rough boring on your wooden workpiece.

You will find them being flat in shape. There are two cutters on spade bits that you can use for different cutting applications depending on the application. The spoon bit is another important and useful wood bit that you can get as part of your tools. The spoon bits as the name suggests looking like a spoon for their shape. The point angle on the head of spoon bits helps with polishing the hole drilled in your workpiece.

We have just mentioned a few types of wood drill bits available on the market. However, it is possible to get many other drill bits for wooden pieces. Some include center bits, Forstner bits, augur bits and many more. Always look at the recommended uses of a bit before using it for drilling it in a wooden workpiece. As the name suggests, these are designed for drilling into brick, block, stone, quarry tiles or concrete. The cutting tip is often made from tungsten carbide bonded to a spiralled steel shaft.

Some masonry drills are described as 'durium tipped', this term refers to a highly durable silicon bronze alloy used instead of tungsten as the cutting point. Masonry drills are usually used in a power drill; although they can be used with a lot of effort in a hand brace.

Most masonry bits can be used with a hammer action power drill, but always check as the action is quite punishing on the bit and cheaper bits have been known to shatter when subjected to the pounding. Always use a slow rotational speed for drilling into harder materials to avoid overheating the tip, and frequently withdraw the bit to remove dust. Also known as a wood or dowel bit, they have a central point and two raised spurs that help keep the bit drilling straight.

The bit cuts timber very fast when used in a power drill and leaves a clean sided hole. They are ideal for drilling holes for dowels as the sides of the holes are clean and parallel. Sizes range from 3 to 10mm. Spur point bits should only be used for drilling wood or some plastics. Sharpening - a bit fiddly as it has to be done by hand.

With their central point and two spurs, Bullet drills resemble spur point bits, but can be used in metal, wood and plastics. Unlike normal twist drills, the twisted flutes are ground away; making a truer, more accurate bit than normal twist bits. They cut a clean hole and cause little damage when they break through the back of the workpiece. Although not a true 'drill', it is used in a power or hand drill to form the conical recess for the heads of countersunk screws.

These bits tend to be designed for use on soft materials such as timber and plastics, not metals. When used with a power drill to counter sink an existing hole, the bit tends to 'chatter', leaving a rough surface.

Note, too, the difference in the lead screws. The coarse lead screw on this Irwin is for softwood; the fine thread on this Jennings is for hardwood. A uger bits are used in a brace and come in two common patterns: Irwin top and Jennings. Both have self-feeding lead screws to help locate the cut and drill a lead hole; lead screws on both come in three iterations: fine hardwoods , medium hard and softwoods and coarse softwoods.

Both patterns have two sharp spurs to score the circumference and two cutting lips to bore the hole. Unlike the Jennings, the Irwin has a solid central shaft; for every three spirals in the cut for the Jennings there are two spirals for the Irwin. Like all bits, augers must be kept sharp and rust-free to work well.

These bits are designed to cut metal, but are commonly and successfully used on wood, too. It can be tricky to get a twist bit started in a precise location and it may follow the grain in the cut. To combat that, use an awl or other pointy tool to start a hole exactly where desired.

Twist bits can cause splintering, particularly on the backside of work. Twist Bits 2. Brad Point Bits 2. Masonry Bits 2. Rivet Bits 2. Spade Bits 2. Installer Bits 2. Step Bits 2. Auger Bits 2. Self-Feed Bits 2. Forstner Bits 2. Hole Saw 2. Countersink Bits 2. Plug Cutter 2. Tile Bits 2. Adjustable Wood Bit 2. Annular Cutter 2. Bits for Metal 2. Glass and Tile Bit 2. Hammer Bit 2.

Bullet Point Bits 3 Conclusion. Pete Ortiz. Pete has been working in the trades since high school, where he first developed a passion for woodworking. Over the years, he has developed a keen interest in a wide variety of DIY projects around the home. Fascinated by all sort of tools, Pete loves reading and writing about all the latest gadgets and accessories that hit the market.

His other interests include astronomy, hiking, and fishing. As the founder of House Grail, David's primary goal is to help consumers make educated decisions about DIY projects at home, in the garage, and in the garden.

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