angle grinder mower blade

Old 05-02-17, 12:54 PM
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angle grinder mower blade

I sharpen my mower blades using an angle grinder.
I've always done this by the disc spinning into the edge and never had any trouble but a lot of sites recommend to have it spin away from the edge.
Does it matter? The metal on these blades is usually soft enough that it gets sharp quickly.
Old 05-02-17, 01:36 PM
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I only use the grinder every so often, as a lot of times a file will suffice, but when I do, I run it from the inside out because it's easier to see what I am doing from the end of the blade rather than from the middle. You're not looking for a knife edge, so I have never considered direction that critical. The main things are that is does a pretty quick job so you need to watch that you don't take off more than you want, and to pace it so that you don't overheat the blade.
Old 05-02-17, 02:09 PM
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Disk will last longer if you change direction.
I switched to 40 grit flap wheel instead of a grinding disk works great and less heat and seems to be faster.
Old 05-02-17, 03:52 PM
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Does the direction matter for kickback? I always assumed the grinder would not catch an edge on this type of metal
Old 05-02-17, 04:19 PM
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I would think it's a safety thing, you dont want the grinder turning into the sharp edge where it could catch.

Also you always want to grind with the sparks away from you!
Old 05-02-17, 04:32 PM
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When you sharpen from the blade towards the edge it can leave a thin piece of metal on that edge. If you grind from the edge towards the blade it removes that excess edge. But as said, on it really doesn't matter on a mower blade. The more razor sharp you make it the faster it will get dull.


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