It is important to know when to sharpen your mower blades. The easiest way to know is to pick one of the blades of grass and examine it to find out whether it is a clean cut or it is rugged. If it is rugged, then it is time to sharpen your mower blade.It is essential to sharpening the blade two or three times during the growing season.
However, if you hit a rock while mowing the lawn, then you should sharpen it right away.Sharpening the blades on your lawnmower is a basic part of the maintenance of the lawn mower.
This is because:
1.Sharper blades make the mower easier to use
2.The sharp blades mean that less energy is required to use the lawn mower
3.Blunt lawn mowers are less effective since they tend to tear into the grass rather than cut it, therefore, reduces the effectiveness.
4.The cut grass will be healthy and green as compared to irregular cut grass which tends to brown, hence looks unhealthy and is prone to diseases.
What you Require
#1.It is important to remove the spark wire in order to prevent the engine from starting while you are removing the blade. This is very important.
#2.Tip the mower back or sideways with the carburetor facing up. This makes it easy to remove the blade and avoids challenges such as oil and gas spillage.
How to Sharpen Mower Blades With Bench Grinder step by step
#1.Removing the Blades
To remove the blades, you are required to turn the mower upside (with where the operator holds it) or on its side and ensure it is steady so that it does not fall back down during the removal.
Wear one glove, grab the blade on one side and start to unscrew the nut in the middle using the wrench.If you do not have a glove, a heavy cloth could suffice or a piece of wood could be used to steady the blade.
If the nut is on too tight, apply some lubricant on it to make it easily slip and open.It is also important to mark the bottom side of the blade to prevent one from returning the blade upside down. If the blade is not properly re-installed, it will not cut grass properly.
#2.Assess the Blade
Check the blade to find out whether it has nicks or whether it is bent. This step is also essential to remove any grass from the blade in order to sharpen it properly.
The cleaning can be done with a dry cloth or a screwdriver. If the dirt is too much, then water and soap may be used to clean the blade.
If the damage is too much, it might be appropriate to buy a new blade rather than to sharpen the existing blade.
#3.Sharpening the Blade
Ensure that you are wearing protective glasses or a welding mask, long-sleeved clothes and gloves. This is to prevent the small metal chips from getting in your eyes and other parts of your body.
Turn on the bench grinder. Ensure to hold the blade in a position that is easy to sharpen and sharpen the blade in the direction that the blade is going in. Ensure that the angle of the blade is maintained through the sharpening process.
Move the blade steadily across the bench grinder in both directions. This is to ensure that the blade is properly sharpened.
#4.Cool the Blade During Sharpening
Ensure to quench the blade repeatedly using a bucket of cold water. The friction between the blade and the grinder causes the blade to be very hot. This can cause the blade to bend or even break hence the need to constantly cool the blade during the sharpening process.
#5.Balancing the Blade
Once the blade has been satisfactorily sharpened, it is essential to make sure that it is balanced. Use the plastic balancer and place the blade into it to ensure it balances.
Alternatively, take the nail and clamp it tightly in the vice, ensuring that it is in a horizontal position. Place the blade with the middle hole onto the nail and from observation, see which side needs more metal removed from it.
Return the blade to the bench grinder and grind the heavier side of the blade and then balance again. Repeat this procedure as required until the blade is properly balanced.
#6.Installing the Blade Back into the Lawn Mower
Before placing the blade back in the mower, clean the grass that is at the bottom of the mower. This is to ensure the effectiveness of the mower so that it works as if it is new.
With the lawn mower laid back or on its side, place the blade in the middle and use the nut to fasten it into position. Take the heavy cloth and hold one side of the blade with it as you tighten the nut using the other hand.