Introduction: Make a Lawn Mower Blade Knife
Make a sweet knife out of a old junk lawn mower blade .
Step 1: Things You Might Need
Tape measure , square and or straight edge, pencil and marker, grinder , cutoff wheel, flap wheel, grinding wheel, and a couple of different sanding discs for starting the polishing finishing process, clamps for holding the material , A bucket of water would be helpful to for keeping the material cool. And one good lawn mower blade. For more detailed work a dremel tool may be handy.
Step 2: Make a Design
In this step you can use a piece of cardboard or paper for a pattern if you would Like. I just freehanded my knife. Use your imagination here. A blade is a blade you can make it as simple or as fancy as you desire. I draw them in pencil first so I can make corrections and then trace over with marker.
Step 3: Cut Your Part Out
Clamp your part so it does not move. Use your cutoff wheel to make the basic shape and take your time so you do not build up too much heat. Use your bucket of water to splash the part occasionally to cool it down . You do not have to take all the material off at this time, use your grinding wheel to make your finishing shape.
Step 4: Make Corrections to Your Shape If Needed
Hold your knife and change your design as needed . Make sure it is comfortable to hold and use. Use your flap wheel to help finish your design it will take off less material and be easier to use.
Step 5: Make a Edge
Take your grinding wheel and cut your Edge . Take your time to not build up heat because the sharper it gets the thiner the material will be and the hotter it will get.
Step 6: The Finish of Your Knife
At this point you can finish it how you would like, I used my sanding disc to clean smooth and polish my knife . I then used polishing compound and a buffer to get a shine. You could also sandblast and paint your knife .
Step 7: Sharpen and Enjoy Your Knife
Resharpen your knife with a stone or other sharpening devise . At this point you're done enjoy.