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 09-10-2010, 13:27 Post: 173929
auerbach



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 Best Tool For Sharpening Brush Hog Blades

First slowly and gently (to avoid heating) grind the upper surface, then flat-file the lower face to remove any grinding burrs. (Upper/lower refers to the orientation when mowing.) Servicing a removed blade allows balancing too.

On-mower touchups are easier with a relatively small grinder. A 4.5" is low-cost and big enough. Or a Dremel-type or an air-powered die grinder with a grinding stone. Electrical tools show the amps on the label.

Whether the cutting bevel is straight, convex or concave doesn't matter much, and if it did, you won't get it regular and perfect with a hand-held grinder.

Grinding to a knife edge allows cutting that's easy on the grass and the engine. But the sharper the edge the shorter it lasts, so most pros want a cutting edge around 1/32 or even 1/16" thick.






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 09-11-2010, 08:53 Post: 173949
auerbach



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 Best Tool For Sharpening Brush Hog Blades

I've seen them for $20 and change. It's a handy tool; with the right blade you can grind or cut masonry or metal. But on-mower I prefer something more compact and easier to guide and sends the sparks more along the blade and less at my face.

For season-end remove them for servicing and clean the deck underside and oil it and the blades. The recommended bevel angle is around 45 degrees but isn't critical. If and when you lose the factory bevel and don't trust your eye, bring one or more to a sharpening shop so you'll have a guide.


KT: Never thought of the belt sander but makes sense. What grit do you use?






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