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Any easy way to make a small lawnmower blade? (12" DIA)? Answered

Hey I am trying to make a robot lawnmower from some motors and a microcontroller I have. The only thing I'm stuck on is where to get such a small blade for mowing (12" DIA or lower)

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jtobakoBest Answer (author)2009-05-26

I picked up a bunch of 10 inch edger blades at Wally World last winter on clearance. They should have more by now : )

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CameronSS (author)2009-05-26

You could try using weedwhacker blades...you can get nylon blades designed to be tougher than a string, but still light enough to be used on a handheld weedwhacker. Also safer--if your robot rises up against you, jab a piece of rebar at the blades and they'll break.

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galaxyman7 (author)CameronSS2009-05-28

Lol, thanks for the advice, I think I will try that. Only problem is that I don't want to replace the nylon, so do you think metal wire will work?

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CameronSS (author)galaxyman72009-05-28

It would do an excellent job cutting the grass, but metal fatigues. The wire probably wouldn't last too long before it broke, flinging off a tiny metal javelin and leaving an off-weighted shaft.

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galaxyman7 (author)CameronSS2009-05-28

hmm, have any other suggestions? I need something fairly permanent

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CameronSS (author)galaxyman72009-05-28

The nylon blades are rather durable. I have never used them personally, but if you're only cutting grass (not running over sticks, rocks, etc.) they should last quite a while, and they're pretty cheap.

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thecookiemonster (author)2009-05-27

i dont think it would be possible to make a blade that would be sharp enough to cut the grass properly and anyway i definitley wouldnt reccomend making one because if it breaks there will be pieces of the blade flying through the air which could kill you!!!

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