Sharpening

The saw should be sharpened in a few passes through the sharpener. The first pass should be regarded as the initial one, the second and the third as equalizing and the next as smoothing ones. The saw’s sharpening should include the whole profile of the tooth (it is a common mistake to sharpen only the front cutting surface).

The sharpening of the saw, if done correctly, leaves neither burn marks in the saw’s gullets of the toothing nor dapping marks left by the abrasive disk. It is important to maintain an ample saw’s gullet radius. When the radius is insufficient, cracks may appear in the saw’s gullet.

Frequent sharpening is beneficial to the saw’s durability because it eliminates micro-cracks in the saw’s gullets. Each sharpening should be carried on until micro-cracks are eliminated. After sharpening any surface irregularities left should be filed away. If left on the cutting edge, such surface irregularities tend to wrap along the tooth during cutting and the saw becomes blunt at one side.

Overheating of the cutting edges, the teeth and the saw’s gullets are very frequent sharpening defects, they may be caused by:

  • excessive feed,
  • mis-selected abrasive disk’s parameters,
  • incorrect abrasive disk’s profiling and setting with respect to the teeth.
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Skrawających Sp. z o.o
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