Home General Lawn Mower Blade Sharpening Angle: Everything You Need To Know

Lawn Mower Blade Sharpening Angle: Everything You Need To Know

What Angle To Sharpen Lawn Mower Blades? Edge Your Lawn
What Angle To Sharpen Lawn Mower Blades? Edge Your Lawn from edgeyourlawn.com


Keeping your lawn mower blades sharp is crucial for maintaining a healthy and attractive lawn. One important aspect to consider when sharpening your blades is the sharpening angle. In this article, we will discuss the optimal sharpening angle for lawn mower blades and provide you with useful tips to keep your blades sharp and your lawn looking pristine.

Understanding Sharpening Angles

The sharpening angle refers to the angle at which the blade is sharpened. It determines the cutting efficiency and the durability of the blade. Different types of lawn mower blades require different sharpening angles, depending on their design and purpose.

Standard Sharpening Angle

For most standard lawn mower blades, a sharpening angle of 30 to 45 degrees is recommended. This angle provides a good balance between cutting efficiency and blade durability. It allows the blade to slice through grass cleanly while maintaining its sharpness for a longer period.

Reel Mower Blades

Reel mower blades have a unique design that requires a different sharpening angle. These blades are cylindrical in shape and cut grass with a scissor-like action. The recommended sharpening angle for reel mower blades is usually between 20 to 35 degrees. This angle allows the blade to make precise cuts and ensures a clean and even finish.

Sharpening Techniques

Now that you know the optimal sharpening angles for different types of lawn mower blades, let’s discuss some effective sharpening techniques:

Using a File

One of the most common and cost-effective methods of sharpening lawn mower blades is using a file. Start by removing the blade from the mower and securing it in a vise. Use a file to sharpen the cutting edge at the recommended angle, making sure to maintain a consistent angle throughout the process.

Using a Bench Grinder

If you have access to a bench grinder, it can be a convenient tool for sharpening lawn mower blades. However, be cautious as improper use can overheat the blade and ruin its temper. Start by wearing protective gear and carefully position the blade against the grinder wheel, maintaining the recommended sharpening angle. Apply light pressure and move the blade in a steady motion until the cutting edge is sharp.

Maintaining Sharp Blades

Once you have successfully sharpened your lawn mower blades, it is essential to maintain their sharpness for optimal performance. Here are some tips to help you keep your blades sharp:

Regular Inspections

Inspect your blades regularly for signs of wear or damage. Replace or sharpen them as needed to ensure efficient cutting.

Keep Blades Clean

Grass clippings and debris can accumulate on the blades, affecting their cutting ability. Clean the blades after each use to prevent buildup.

Balance the Blades

Imbalanced blades can cause uneven cutting and put strain on the mower’s engine. Use a blade balancer to ensure even weight distribution.

Store Blades Properly

When not in use, store the blades in a dry and secure location to prevent rusting and damage.


The sharpening angle plays a vital role in the performance and longevity of your lawn mower blades. By understanding the recommended angles and employing proper sharpening techniques, you can maintain sharp blades that effortlessly cut through grass, leaving your lawn looking pristine. Remember to inspect, clean, and store your blades properly to ensure optimal performance throughout the mowing season.