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Mower Blades

romod's Avatar

Join Date: May 2002
Posts: 200

10-20-02, 08:46 PM   #1  
Mower Blades

When using a file to sharpen a blade do you file the top and bottom of the blade. Seems like i can never get a blade sharp by just filing the angle side. My brother told me filing both sides will ruin the blade,is that true?

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cheese's Avatar
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10-20-02, 10:48 PM   #2  
Hello romod!

Anytime you sharpen a lawnmower blade, you want to duplicate the original angle. This would normally be about a 45 degree angle on the top side of the blade.

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lukea's Avatar
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10-28-02, 06:12 PM   #3  
Sharp blades

Blades are sharpened on one side at approx. 35 - 45 degrees. Also the blades sould not be razor sharper but slightly blunted. This will extend the life of the blade and prevent serious damage if you bounce a rock or 2 around them.

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10-28-02, 06:49 PM   #4  
Hello: romod

Excellent advice offered by both cheese and Luke.
Never sharpen both side of the blade.

If you have a common table top belt sander, an 80 or 100 grit belt, try sharpening the blade on the belt sander. It's faster and does a better job with a little practice.

Once you master this method, hand sharpening by file will become a method of the past. No requirement to hone the sharpened edge for home useage when done by a do-it-yourself person. Grass does not care, only customers do...

After any method of sharpening, be sure to balance the blade. Several methods can be located in prior postings in my sharpening topic below this topic.

Failure to balance the blade after a sharpening not only causes uneven cutting and vibrations, but will ruin the engines crankshaft seal. Once the seal is damaged the engine will leak oil.

Regards and Good Luck.
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