Introduction: How to Straighten and Sharpen a Lawnmower Blade
Bending lawnmower blade is never fun and can be very frustrating. If you're ever unfortunate enough to bend one I hope this helps you fix it.
So here's how I did it I took me about ten minutes to do this repair.
Remember if you do this, the blade can break,so be careful and you your best judgement. At some point you will need to replace the blade, for me this point was after the fourth time Istraightened it
Step 1: Tools
For this repair I used:
Ratchet with long handle A socket the size of the bolt on my mower
A pair a Channel lock pliers (any large pair on pliers will work)
Ball peen hammer
Sledge hammer File
And an anvil of you have one
Flip the mower up on one side it's better to flip the mower so that the air filter is up so that gas or oil does not drain in to the air filter.
Take the socket and wrench and remove the blade you will need something to brace the blade against, I usually do this with my foot. If you don't want to use just your foot for this get a large price of scrap wood and put that between your foot and the lawn mower blade. Once the blade is removed flip it back over so that it sits on the ground like it should.
Step 3: Bend It
The best method I have found for doing this is to place the none bent end under the anvil and use a pair of channel locks to bend the blade back to fairly straight.
If you don't have access to a anvil it would work just as well to put the none bent end in a vise or even clamp it to the work surface with a very strong clamp.
Step 4: Hammer It
Take the ball peen hammer to flatten out the last of the bend I use the avil for this but if you don't have access to one a sledgehammer will do the anvils job.
Step 5: Sharpen It
Grab the file and hold the straightened blade against your work table, use the file to sharpen the cutting edge of the blade, if you are having trouble finding this the cutting edge of the blade is usually the cleanest part of the blade. Put the file up to the blade and apply slight pressure and drag the file away from it. Make sure that all the strokes go away from the edge.
It you happen to have the dremmel and lawnmower sharpening atackment or a bench grinder just use that.
Step 6: Reattach the Blade
Take the straightened blade, wrench and socket, flip the lawnmower up on its side and reattach the lawnmower blade. when you think the lawnmower blade is on tighten it some more , its better to be safe then sorry when dealing with this kind of thing.
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please remember it be careful and use your best judgement.