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Find the Closest Drill Bit to 516 for Your Power Drill!

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Written By John Gibbs




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Are you wondering what is the closest drill bit to 516? If so, then you have come to the right place! In this article, we will discuss all you need to know about the closest drill bit to 516. We will discuss what size drill bit is closest to 516, the differences between 516 drill bits and other drill bit sizes, and tips on how to select the best drill bit for your project.

What is the Closest Drill Bit to 516?

What Is The Closest Drill Bit To 516?

Meaning of Drill Bits Measurements

Drill bits are usually measured in fractions of an inch or in millimeters. When measuring drill bits in fractions, the number indicates the size of the drill bit. In this case, 516 of an inch is equal to 8.2 mm.

Comparison of Drill Bits Closest to 516

The closest drill bit to 516 is a #10 drill bit, which is equal to 5.2 mm. This is slightly smaller than 516, but it will still work for drilling holes. The next closest drill bit is a #11, which is equal to 5.5 mm, and is only slightly larger than 516.

How to Select the Right Drill Bit

How To Select The Right Drill Bit
Choosing the right drill bit is essential for a successful job. The correct drill bit size, type and material will make the difference between a successful drilling job and a failed one. When selecting a drill bit, it is important to consider the size, type and material of the bit.

Factors to Consider When Choosing Drill Bits

The size of the drill bit is one of the most important factors to take into consideration. For instance, when drilling a hole for a 5/16-inch screw, the closest drill bit size is 5/16-inch. If a smaller size is needed, then a drill bit size of 1/4-inch would be the closest size.

Types of Drill Bits

The type of drill bit used is also an important factor when selecting the right drill bit size. Common types of drill bits include twist drill bits, spade drill bits, and brad point drill bits. Each type of drill bit is designed for different applications and materials. Twist drill bits are the most common and are suitable for a wide range of materials, including wood, plastic, and metal. Spade drill bits are designed for drilling larger holes in wood, while brad point drill bits are designed for drilling into plastic and soft metals.

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Tips for Using the Right Drill Bit for Your Project

Tips For Using The Right Drill Bit For Your Project

  • Check the material you are drilling – Different materials will require different drill bits. Make sure you know the material you are drilling, its thickness and its type.
  • Select the drill bit based on the job – Different types of drill bits are designed for different types of jobs. For example, a brad-point bit is best for drilling into wood, while a twist bit is better for drilling into metal.
  • Choose the right size drill bit – The right size drill bit is important for your project. If you choose a drill bit that is too small, it will take longer to drill and may not be strong enough to cut through the material. If you choose a drill bit that is too large, it can damage the material.
  • Consider the length of the drill bit – The length of the drill bit can affect how deep it can cut. Longer drill bits can cut deeper, while shorter drill bits are better for shallow holes.
  • Use a drill bit designed for the job – Drill bits come in a variety of shapes and sizes. Select a drill bit that is specifically designed for the project you are working on.
  • Choose a high-quality drill bit – Make sure to select a drill bit that is made from high-quality materials. Low-quality drill bits can easily break or become dull quickly.

Advantages and Disadvantages of Using the Closest Drill Bit to 516

Advantages And Disadvantages Of Using The Closest Drill Bit To 516

  • Advantages
    • Using the closest drill bit to 516 ensures accuracy and precision when drilling.
    • It reduces the chances of inaccurate and sloppy drilling.
    • The drill bit is designed to fit the exact size of the material being drilled, which helps to maximize the strength of the drilled hole.
    • It can be used for a variety of materials, including wood, metal, plastic, and stone.
  • Disadvantages
    • Using the closest drill bit to 516 can be more expensive than using a generic drill bit.
    • It can be difficult to find the exact size of the drill bit needed, as it may not be available in stores.
    • The drill bit may not be compatible with certain drill machines and tools.
    • Drilling with this bit may take longer than with a generic bit.

Maintenance of Drill Bits

Maintenance Of Drill Bits

Drill bits should be regularly maintained to ensure efficient operation and long life. It is important to sharpen, lubricate, and clean drill bits regularly. Dull bits can cause excessive friction and wear, resulting in excessive heat that can damage the bit and the material being drilled. Regular sharpening of the bit will ensure clean, accurate, and efficient cuts. Lubrication helps to reduce friction and heat, while cleaning the bit helps to remove any debris that may have accumulated while drilling. It is also important to inspect the drill bit periodically for any signs of wear or damage, and to replace it if necessary.

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Safety Precautions When Using Drill Bits

  • Wear Safety Gear: Always wear safety gear while using drill bits such as safety glasses to protect your eyes, safety gloves to protect your hands and face masks to protect your lungs from dust particles.
  • Secure the Work Piece: Make sure the work piece is firmly secured in a drill press or a vise to prevent it from slipping during the drilling process.
  • Select the Right Drill Bit: Ensure that you choose the right drill bit for the material and size of the hole you need to drill.
  • Check Drill Bit Sharpness: Make sure the drill bit is sharp and replace it if it is not in good condition.
  • Set the Speed: Set the speed of the drill bit according to the material of the work piece.
  • Maintain Speed: Maintain a consistent speed throughout the drilling process to ensure maximum efficiency.
  • Apply Pressure: Apply a slow and even pressure to the drill bit while drilling to ensure a clean hole.
  • Remove Chips Frequently: Remove chips from the drill bit frequently to prevent them from clogging the hole.
  • Lubricate Drill Bit: Always lubricate the drill bit with oil or cutting fluid before drilling to reduce heat and friction.
  • Unplug the Drill: Make sure to unplug the drill when you are changing drill bits or when you are done drilling.

Frequently Asked Questions

What makes a drill bit suitable for 5/16″

A drill bit suitable for 5/16″ needs to have a cutting edge with a diameter of 5/16″ or slightly larger. It should also be made from a material that is strong enough to handle the torque required to penetrate the material. Additionally, it should have a shank with a diameter that fits the drill chuck, and it should have a fluted design to ensure the drill bit won’t bind during use.

How Does Drill Bit Size Affect Performance?

Drill bit size affects the performance of a drill by determining the maximum size of a hole that can be drilled as well as the speed at which it can be drilled. Smaller drill bits are able to drill holes quickly but are limited in the size of hole that can be drilled, whereas larger drill bits can drill larger holes but take longer and require more power.

What are the Common Materials for 516 Drill Bits?

5/16 drill bits are most commonly made from high-speed steel, cobalt, and titanium. High-speed steel is the most common material used, offering superior durability and cutting ability. Cobalt is a stronger and more heat-resistant material, making it ideal for drilling into harder materials. Titanium is a lightweight and corrosion-resistant material, making it a great option for drilling into soft materials.

What Special Safety Precautions Should I Take When Using a 516 Drill Bit?

When using a 516 drill bit, it is important to ensure safety by wearing protective gear such as safety glasses, a face mask, and long-sleeved clothing. Additionally, one should avoid wearing loose clothing or jewelry and ensure the drill bit is securely fastened to the drill chuck. The drill bit should be lubricated with light oil before use and checked regularly to ensure it is not damaged or worn. Finally, the drill bit should be properly stored to prevent damage from occurring.

Are there any specific drill bits better suited for drilling through harder materials?

Yes, cobalt alloy and titanium-coated drill bits are designed specifically to drill through tougher materials such as stainless steel, hardened steel, cast iron, and other hard metals. The cobalt alloy and titanium-coating helps to reduce friction and heat buildup while drilling, resulting in a cleaner and faster hole.


A 5/16 inch drill bit is the closest size to 516 and is the recommended drill bit for most applications. Although other sizes such as 1/4 inch and 8mm may be close in measurements, the 5/16 inch drill bit is the most accurate size for a 516 drill bit.



About John Gibbs

Hello everyone! My name is John Gibbs. I am 60 years old and have been in the family construction business all my adult life. Construction is not only my profession but also my passion. I know everything about building and repair materials, tools, advanced methods, techniques, and approaches. I will share the same knowledge with you in my articles.

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