Frequent use -- as well as rocks and stumps -- dulls the blades, so they should be sharpened periodically to cut most effectively. Best Tool For Sharpening Brush Hog Blades. Most manuals say to leave approximately a 1/8" flat edge on them instead of making them sharp as you would with a lawn mower or finish mower. Opinion on to sharpen or not to sharpen a brush hogs blades I believe I have found most of the rocks located on my property but of course there is always more. Got a question about sharpening: I've always sharpened the blades on my bush hog once a year, never tried to get them razor sharp but just clean off the biggest nicks and get some kind of edge on them. Normally, you should clean it after every use before storing it. Discussion in ' Whitetail Deer Habitat ' started by Wild Thing , Aug 5, 2020 . I use a makita 5" sander. But in case your brush cutter blade needs cleaning before sharpening it, here is a quick guide on how to clean your blade properly. My blades on the bush hog I have are pretty darn sharp for a bush hog blade and its been many years since they were done. If they aren’t too bad I go ahead and grind them myself. especially the high lift blades, in the web area where the blade makes it upsweep to form a lifting foil. Depends on how bad (dull/dinged/dented) they are. Safety goggles are a must, along with gloves and a jacket. Anybody got any tips or how to videos on touching up or sharpening brush cutter blades. I sharpen brush blades for a contractor. Close attention and care to maintain the angle of the blade is the key to sharpening your brush cutter blade. If you have a front end loader you can just pick the mower up using a chain. As soon as they need sharpening I sharpen them. Attached is a pic of just one of mine on an sq172 . Regardless of size, Bush Hog's mowers are rotary models that use a single blade spinning horizontally to cut through thin grass blades or tough brush. Needless to say, your brush cutter blade will get dirty with each use. Still knocks down the big weeds but the little wooden stalks less than an inch went down easy at first but not for long. Bought one and it works great but the blade dulled quickly, not that I ever hit the dirt with it. The angle on the blade may be slightly different, however the procedure will be the same. Best way to sharpen blades on rotary cutter. I used to redo all my JD 180 blades like this as well. I use a steep angle about 30-35 degrees to give the edge a fighting chance. I use 80 grit to shape the blade and 120 to put an edge on. If you use the search function, you should find lots of previous discussions on the topic of sharpening brush hog or rotary cutter blades. Step 1: Make sure that the engine is turned off. The process of sharpening tool blades is similar whether it is a manual or gas operated tool. Murf Join Date: Dec 1999 Posts: 7142 Toronto Area, Ontario, Canada Pics: 2010-09-10 173939 We use an angle grinder, but we remove the blades from the mower to do it, trying to hold a floppy, rotating blade while you hold the grinder (a job that usually requires 2 hands) is a royal PITA! Just one note -- you don't want a razor sharp edge on a bush hog blade, and this is ESPECIALLY true if you cut saplings and brush. David Carpenter Join Date: Posts: 1: 2002-05-20 38838 I have a 5' Bush Hog and use a 4.5 angle grinder also, works fine. Not only will sharp edges not last, a very sharp blade can cut a sapling and create a spike that will go through a tire, or worse, a foot. I use quick clamps, clamped to the back of the cutter to keep the blade from moving. A2A. Brush Cutter Blade Cleaning. It is a large hydraulic motor-driven attachment on a skid steer loader. How often do you sharpen the blades on your brush hog? Use a steep angle about 30-35 degrees to give the edge a fighting.. 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