2941 Pretty Branch Dr. West * Mobile Alabama 36618 terryplatt@yahoo.com 251-583-5955

Super Sharp Shop

Sharpening Service Mobile Alabama Area


Lawn Mower Blade Sharpening

Near Mobile Alabama in Semmes, Alabama

Lawn Mower Sharpening Service


Lawn mower blades are hard. They have to be because of the tremendous beating they take. Metal hardening is a critical issue with manufacturers because if the blade is too hard it become brittle and will crack or chip when it encounters a stone or practically any hard object in the grass. On the other hand, if the blade is too soft, it will dull easily and need regular sharpening which decreases the life of the blade.

Removing Lawn Mower Blades

When you take your blades off for sharpening, take a good look at them and try to determine what their inherent weakness may be. If they are bent or very dull you may want to try another brand of blade. If they are cracked or chipped, you may want to try another brand also. Switch brands once in a while until you find one you are happy with. All blades are not equal.

How To Sharpen Lawn Mower Blades

Sharpening lawn mower blades is somewhat critical too. The very best way to prevent damage from the sharpening process is to place the blade in a steady, bench-mounted vise and use an aggressive file to resharpen the edge. It takes a long time and many of you may not have a vise. Be sure to wear heavy leather gloves while sharpening because just one slip and you can get a mighty nasty cut.

How To Sharpen Lawn Mower Blades Without Taking Them Off

Yes, I know some people do not have the tools, time or experience needed to remove and sharpen lawn mower blades. But, I will not tell you what you want to hear. Instead I will say it is almost impossible to do a proper job of sharpening the blades while on the mower but if you must, some people report having fair results using a dremel tool with grinding stones.

Lawn Mower Blade Sharpening Angle

The blade to be sharpened will determine the angle needed. If the blade is so worn that you cannot determine the original angle, then it really is time to replace the blades.

Blades are ground at 30 degrees to as much as 40 degrees.

How To Sharpen A Lawn Mower Blade With A File

When sharpening a power mower blade, remove the blade from the machine, secure it in a vice, and run the file down the blade in a single direction. Keep mower blades sharp for the best results.

Here is a video that is short and to-the-point.

Using Power Tools To Sharpen Lawn Mower Blades

What about using power tools? Well, it makes sharpening a lot quicker but if you do not control the heat, you will soften the blade and it will then experience a short, short useful life. Here is a method that does work though – keep water running on the blade and don’t sharpen but a few seconds at a time. Even with the down time for cooling, it is much quicker than sharpening with a file.

How To Sharpen Lawn Mower Blade With A Bench Grinder

The debate over the angle grinder vs the bench type blade sharper has been beat to death. For over ten years a bench grinder with lots of water flowing over the stone and blade served me well. But, there were times when blade sharpening was an all day, sometime’s two day taskfor me using the bench grinder.

Nowadays, I much prefer using one of the flapper disk on an angle grinder. It produces far less heat and a keener edge. You do have to have a light touch though  but the the technique is simple to learn. Forget the bench grinder and pick up an inexpensive angle grinder and a premium flapper disk of 36 to 80 grit.

How To Sharpen Lawn Mower Blade With A Hand Grinder

Hold the grinder at the proper angle on the blade (in a vise) and keep the grinder moving back and forth along the cutting surface, never letting it stay in one place long enough to turn the metal blue. If it starts turning spots blue, you’re removing the temper from the metal.

Here are photos of a pair of blades sharpened with a power grinder with a “flapper” sanding disk attached. The blades were fastened securely in an outside vise and water from a water hose ran over them, checking every 30 seconds or so for heat. If the blades get too hot to touch, you’ve already gone to long. Alternate between 5 seconds of sharpening and 10 seconds of cooling. Take your time and you can get lawn mower blades sharp like these:

Lawn Mower Blade Sharpening in Mobile Alabama

Super Sharp Shop
ph: 251-583-5955

Lawn Mower Blade Sharpening in Mobile Alabama

Lawn Mower Blade Sharpening in Mobile Alabama