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A so called perfect combine harvester blade has to be both hard and wear resistant. Hard because it has to cut through the crops both wet and dry, and wear resistant to give it a longer life. Also it should not be brittle nor get wraped whenever an obstacle comes its way. To fulfill all these requirements we at VERSA® AGRO had researched a lot to give the farmers best suitable for them.



 

The general trend in manufacturing harvester blades is that they are induction hardened at the cutting edges (55-58 HRC) while rest of the area is kept as it is (15-18 HRC). Though due to the inductive portion the cutting edges don’t wear off easily but being brittle may break off at that portion when an obstacle comes and may get wrapped at the soft part which reduces the cutting efficiency of the blade. (see Fig.1)

 


 

To overcome this problem we at VERSA®  AGRO has come up with bit different blade where the hardness of the cold rolled strip, from which the blank is cut, is kept at 20-25 HRC. This quality gives the otherwise softer part some toughness against warp page. After that the blade is induction hardened at the cutting edges to about 58-60 HRC. After all this the complete blade is oil tempered to give the cutting edges the toughness required to cut through the crop without breaking and lasting long.(see Fig. 2)

 

One more common thing with iron blades is that they get rusted with only slight moisture in the air. The rust actually eats up the teeth thus making it weak. For that reason we coat the blades with a special varnish which gives it a protective coating against rust and at the same time gives it a shine thus making the blade safe even when not in use for long time

 

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