There are standard drill bit sizes for specific applications, such as a #7 drill bit for tapping threads and a #21 drill bit for drilling holes for 6-32 screws. Gauge sizes are also used in wire industry applications and are expressed as a number, with a higher number indicating a smaller diameter. Metric measurements are expressed in millimeters and are used widely throughout many industries, while fractional-inch measurements are more commonly used in North America. Knowing equivalent drill sizes is important to simplify the process of creating holes of different sizes. Number 2 Drill BitĪ number 2 drill bit is slightly smaller than a 7/32 drill bit, but can still be used in similar applications. However, it's still suitable for drilling in similar materials. Letter U Drill BitĪ letter U drill bit has a diameter of 0.228 inches, which is slightly larger than a 7/32 drill bit. It's suitable for drilling in wood, plastic, and metal surfaces. Here are some of the most common 7/32 drill bit equivalents: 5.5mm Drill BitĪ 5.5mm drill bit is the closest metric equivalent to a 7/32 drill bit. In such cases, you can use an equivalent size bit to achieve a similar result. While a 7/32 drill bit is a standard size, it may not always be available. Selecting the correct size of drill bit is crucial to ensure the hole created is the correct diameter and depth. They are easy to use with handheld drills that can be adjusted to select the appropriate speed and torque.ĭifferent designs are available to suit different applications, such as 135-degree point angle for tougher materials and 118-degree point angle for softer materials.
They have a helical shape and are made of high-speed steel to withstand high temperatures and provide rigidity. Twist drills are commonly used in various industries to drill through different materials and come in various sizes.
Understanding the different types of bits and their uses can help you select the appropriate tool for your project and achieve the desired results. Spade bits are for larger holes in wood, while auger bits are for deep, clean holes in wood.įorstner bits are for woodworking and masonry bits are for drilling through brick, concrete, and stone. Twist bits are the most common and are used for drilling through wood, plastic, and light metals. Other types of drill bits include twist, spade, auger, forstner, and masonry bits.Įach type is suited for different drilling tasks. They are often used in woodworking and metalworking. Countersink Drill BitĬountersink bits are used to create a recess for a screw or nail so that it sits flush with the material's surface. It has a sharp point that helps to center the bit and prevent it from wandering. The brad-point drill bit is designed for drilling clean and precise holes in wood. It has a spiraled flute design that allows chips to be removed from the hole. The twist drill bit is the most common type of drill bit and is suitable for drilling in a variety of materials, including wood, metal, and plastic. Here are some of the most common types: Twist Drill Bit There are several types of 7/32 drill bits available in the market, each designed for specific applications.