How To Sharpen An Auger Bit

9. Sharpening Drill Bits
9. Sharpening Drill Bits from


Auger bits are essential tools for drilling holes in wood, and like any other cutting tool, they can become dull over time. Sharpening an auger bit is a simple process that can restore its cutting performance, saving you time and effort. In this article, we will guide you through the steps to sharpen an auger bit effectively.

Gather the Necessary Tools

Before you begin sharpening your auger bit, make sure you have the following tools on hand:

  • A bench grinder
  • A flat file
  • A honing stone
  • Safety goggles

Step-by-Step Guide

Step 1: Prepare the Auger Bit

Start by cleaning the auger bit to remove any dirt or debris. You can use a wire brush or a cloth for this purpose. Ensure that the bit is dry before proceeding to the next step.

Step 2: Secure the Bit

Secure the auger bit in a bench vise, making sure it is stable and won’t move while you’re working on it. This will provide a secure and safe platform for sharpening.

Step 3: Grinding

Put on your safety goggles and turn on the bench grinder. Hold the auger bit against the grinding wheel at a 60-degree angle. Gently move the bit back and forth across the wheel, applying light pressure. Be careful not to overheat the bit as it may affect its hardness.

Step 4: Check for Uniformity

Regularly check the bit’s cutting edges to ensure they are being ground evenly. If you notice any unevenness, adjust your technique accordingly. It’s important to maintain a consistent angle and pressure throughout the grinding process.

Step 5: Use a File

After grinding, use a flat file to remove any burrs or rough edges that may have formed during the sharpening process. Gently file the cutting edges to ensure they are smooth and sharp.

Step 6: Honing the Bit

Next, use a honing stone to achieve a razor-sharp edge on the auger bit. Apply honing oil to the stone and hold the bit at a 25-degree angle. Move the bit in a circular motion against the stone, applying light pressure. Repeat this process several times for each cutting edge.

Step 7: Final Check

Inspect the auger bit for any remaining imperfections or dull spots. If necessary, repeat the grinding and honing process until the bit is uniformly sharp.


Sharpening an auger bit is a straightforward process that can significantly improve its cutting performance. By following these steps and taking the time to properly maintain your auger bit, you can ensure that it remains sharp and effective for years to come.