How To Sharpen Mora Ice Auger Blades

Maintaining sharp blades on your Mora ice auger is crucial for efficient and safe ice fishing. Dull blades require significantly more effort to cut through the ice, increasing the risk of injury and reducing your valuable fishing time. This guide provides a comprehensive explanation of how to sharpen your Mora ice auger blades.

Preparing for Sharpening

Before you begin, ensure you have the necessary tools and a suitable workspace. A clean, well-lit area is essential. You will need the following:

• A set of replacement blades (optional, but recommended for comparison)
• A flat file (a mill file or a specialized auger sharpening file)
• A fine grit sharpening stone (optional, for final honing)
• A blade protector (to prevent accidental cuts)
• A vise or clamps (to secure the blades)
• Safety glasses
• Work gloves
• A marker or pen

Safety First: Always wear safety glasses and work gloves to protect your eyes and hands from metal shavings and sharp edges.

Blade Inspection

Begin by carefully inspecting the blades. Look for any significant damage, such as chips, cracks, or excessive rust. Severely damaged blades may need replacement rather than sharpening. Compare the dull blades to a new set, if you have one. Note the angle and overall shape of the cutting edge. This will serve as a reference point during the sharpening process.

Sharpening Process

Securing the Blades

Secure one blade at a time in a vise or clamp. Ensure the blade is firmly held and does not move during sharpening. The cutting edge should be easily accessible. Avoid over-tightening the vise, as this could damage the blade.

Filing the Bevel

The most important aspect of sharpening Mora auger blades is maintaining the correct bevel angle. The bevel is the angled surface that forms the cutting edge. Use the flat file to carefully remove metal from the bevel. Use smooth, consistent strokes, following the original angle of the bevel. Work in one direction only, from the back of the blade towards the cutting edge. Avoid rocking the file, as this can create a rounded edge. Focus on removing small amounts of metal with each stroke.

Maintaining the Angle: Regularly check the angle of your filing against the reference blade (if available) or your initial assessment. If you are unsure of the angle, it's better to err on the side of caution and remove less metal.

Checking for Burr: As you file, a small burr (a thin, raised edge of metal) will form on the back of the blade. This is normal. Once the burr is consistent along the entire cutting edge, it's time to move on to the next step.

Removing the Burr

Carefully remove the burr from the back of the blade. You can use the flat file or a fine grit sharpening stone for this purpose. Hold the file or stone flat against the back of the blade and gently stroke it along the cutting edge. Only light pressure is needed. The goal is to remove the burr without altering the angle of the bevel.

Alternative Burr Removal: Some people prefer to use a piece of hardwood to remove the burr. Draw the back of the blade along the edge of the wood, applying light pressure. This method can be particularly effective for delicate blades.

Honing (Optional)

For an even finer edge, you can hone the blade using a fine grit sharpening stone. Apply a small amount of honing oil to the stone. Hold the blade at the correct bevel angle and gently stroke it along the stone. Use light pressure and consistent strokes. Honing will polish the cutting edge and improve its sharpness.

Repeat for the Other Blade

Repeat the sharpening process for the other blade. Ensure that both blades are sharpened to the same angle and sharpness. This is crucial for balanced cutting performance.

Testing and Reassembly

Testing the Sharpness

After sharpening, carefully test the sharpness of the blades. Use a piece of softwood (like pine) to test the cutting action. The blades should bite easily into the wood without requiring excessive force. If the blades are still dull, repeat the sharpening process.

Caution: Be extremely careful when handling sharpened blades. They are very sharp and can easily cause cuts.

Reassembly

Carefully reassemble the blades onto the auger. Ensure the blades are properly aligned and secured. Tighten the screws to the correct torque specification (if available). Over-tightening can damage the blades or the auger. Install the blade protector to prevent accidental cuts during storage and transport.

Maintenance

Regular maintenance is key to keeping your Mora ice auger blades sharp. Clean the blades after each use to remove ice, snow, and debris. Apply a light coat of oil to prevent rust. Store the auger in a dry place.

Preventative Measures: Avoid drilling into dirty ice or ice that contains sand or gravel. This can quickly dull the blades. If you encounter resistance while drilling, stop immediately and inspect the blades for damage.

When to Replace Blades

Even with careful sharpening, blades will eventually wear out. Replace the blades if they are severely damaged, excessively worn, or if you are unable to achieve a sharp edge after repeated sharpening. Using dull blades is inefficient and potentially dangerous.

Pro Tip: Consider purchasing a spare set of blades to have on hand. This will allow you to quickly replace dull blades and get back to fishing without delay.

Troubleshooting

Uneven Cutting: If the auger is cutting unevenly, check to ensure that both blades are sharpened to the same angle and sharpness. Also, check the alignment of the blades on the auger.

Blades Won't Cut: If the blades are still not cutting after sharpening, double-check the bevel angle. It's possible that you have inadvertently altered the angle during sharpening. Also, ensure that you have removed the burr from the back of the blade.

Chipped Blades: Minor chips can sometimes be removed during sharpening. However, if the chips are large or deep, the blades should be replaced.

Rust: Remove rust with a wire brush or steel wool. Apply a rust inhibitor to prevent future rust formation.

Alternative Sharpening Methods

While hand filing is the most common method, there are other ways to sharpen Mora ice auger blades. Some anglers use powered sharpening tools, such as bench grinders or rotary tools. However, these tools require a high level of skill and control to avoid damaging the blades. It is generally recommended to stick with hand filing unless you have extensive experience with powered sharpening tools.

Professional Sharpening: If you are uncomfortable sharpening the blades yourself, you can take them to a professional sharpening service. Many sporting goods stores or hardware stores offer blade sharpening services.

Diamond Sharpeners: Diamond sharpeners are also available and can be very effective for sharpening ice auger blades. They are more aggressive than traditional files and can remove metal more quickly. However, they also require more care to avoid over-sharpening or damaging the blades.

Conclusion

Sharpening your Mora ice auger blades is a necessary task for any serious ice angler. By following these instructions and taking the time to properly maintain your blades, you can ensure efficient and safe ice fishing for years to come. Sharp blades translate to less effort, more success, and a more enjoyable experience on the ice.