As is the case with most gardening tools, a lawn mower, whether electric, gas powered or cordless, will need some maintain from time come time. And, nearly all lawn mowers will call for their chisels to be removed for either sharpening or replacing.

You are watching: Are lawn mower blades reverse thread

A question we frequently get asked is “are lawn mower knives reverse thread?”. Technically speaking, it’s no the mower blade that’s turning back threaded yet rather the nut the holds the blade in place.

And, yes sir a great reason for that. The reverse thread permits the nut to continually tighten together the tongue is rotating. This method that it won’t loosen and fall off through every rotation that the blade. However, girlfriend may discover that not all lawnmower chisels use a bolt that has actually a turning back thread.

Let’s delve into this a tiny further so the you understand specifically how this works.

Explaining how Lawn Mower Blade reverse Thread Nuts Work

Most lawn mower knives turn in a clockwise direction. So, if the seed holding the tongue in place is tightened in a clockwise direction then it i will not ~ loosen as the blade turns. Conversely, if you have actually a lawn mower whose knives turn in a counterclockwise direction, climate the seed would also be tightened in a counterclockwise direction.

Therefore, every rotation the the blade in reality tightens the nut quite than works it loose.

If you desire to eliminate the tongue to one of two people sharpen or change it, psychic the following:

If your mower tongue rotates in a clockwise direction, climate you need to loosen the seed in a counterclockwise direction.If her mower tongue rotates in a counterclockwise direction, then you desire to loosen the nut in a clockwise direction.

How carry out you tell which method your mower tongue turns? for this, you have actually to check the place of the discharge chute. If this chute is top top the right hand side and is angled back, then your mower tongue rotates in a clockwise direction.

How to Safely eliminate Your Lawn Mower Blades

Your mower knives will wear under over time and you may need to replace castle or just sharpen them if you space able to execute this. Right here are some actions on exactly how to remove the tongue safely, especially on a gas powered mower.

Step 1: Make certain your Mower is Empty

Because you will do it be flipping the mower on its side, you desire to ensure the there is no gas left in it. This is not necessary for an electric or cordless mower, that course.

When removed mower blades, make certain that girlfriend wear heavy duty gloves to defend your hands. Mower blades and also deck edges deserve to be reasonably sharp and also you don’t want to accidentally reduced yourself.

Next, rotate the mower top top its side. For gas it is provided mowers, you desire to ensure the the air filter is on top. If you upper and lower reversal the mower the various other way, oil can leak into the filter and you’ll have a the majority of maintenance to do.

Step 2: Disconnect the Mower’s power Source

For gas it is provided mowers, you must disconnect the cable from the spark plug and also push it out of the means so that it can not accidentally touch the plug if you’re functioning on the mower.

For cordless mowers, just remove the battery pack. Electrical mowers simply need to it is in unplugged.


Step 3: placed on a Retainer to avoid the tongue from Moving

Once did you do it flipped the mower, you require some type of retainer to prevent the blade from transforming while you loosening the nut. You can use other as simple as a block of timber wedged between the blade and the next of the deck.

Step 4: ease the Nut making use of a Wrench and Socket

Most nuts hold the mower blade in place will ease in a counterclockwise direction. So, it’s simply a case of loosening the nut and removing it. If the bolt is yes, really tight, you can need to usage a ratchet expansion or a breaker bar to loosen it.

As you take it the tongue off, it’s crucial to keep in mind which means it fits onto the mower so the you can replace the correctly. You must note which side of the tongue is facing outward and which next is facing toward the mower deck.

Also take keep in mind in i m sorry order the tensioning washers or installed on the bolt.

Step 5: attach the brand-new Blade

Once the old blade has been removed, you can safely attach the new blade. Ensure that it’s the right means up. Then, tighten the nut in a clockwise direction to secure the blade. Examine the user manual for her mower to see what the torque value need to be for your details unit.

Don’t forget to reconnect the ignition cable to the spark plug once you’ve perfect replacing the blade.


Frequently asked Questions

Does a lawn mower blade turn counterclockwise or clockwise?

The bulk of lawn mower blades will rotate clockwise.

How tight must you tighten a lawn mower blade?

The mower blade have to be tight enough so that can’t move on that own. However, you should have the ability to move it with your hand if you use some pressure.

Should a lawn mower blade spin freely?

Generally, a lawn mower blade must not rotate freely because it’s connected to the engine via a belt.

Why is mine mower cutting reduced on one side?

This is usually resulted in by one uneven deck where one side of the deck is lower than the other. You just need come make some adjustments to level the deck again.

Final Thoughts

Most lawn mower blades are linked with a reverse thread nut. This is to ensure that the nut and bolt hold the blade in place doesn’t loosen together the blade rotates.

Remember the to ease the nut, you have to turn it in the opposite direction the the typical rotation of her mower blades.

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Before you adjust your mower blade, ensure that you’ve disconnected the engine and that you wearing gloves to avoid any feasible injuries.