Background

Enoki cuts backyard grass by brush cutter. The chip saw was blunt.

Summary

The brush cutter recovered sharp, as Enoki replaced the blunt chip saw.

経緯

刈払機の切れ味が悪くなった。

要約

チップソーを交換すると，切れ味が戻った。

Photo1 Chip saw specifications

Chip saw shape

Enoki ordered a chip saw on 2016-07-24 and has used for 5 years. Brush cutter has been unable to cut down soft grass because of blunt saw edge. Enoki bought new one as shown in Photo1.

Photo2 Poor Chip shape comparison

Photo3 Socket wrench

The pocket shape of chip saws are very different. Enoki doesn't know whether new shape is better or worse.

Chip shape comparison

Comparing with new chip saw edge, the edge of the old one is worn and blunt as shown in Photo2.

Socket wrench

It is necessary for a socket wrench to loosen or fasten the nut as shown in Photo3. The nut is CCW screw. Rotating the wrench CW, the nut will be loosen.

Conclusion

Taking a photo of chip saw edge yearly, worn status might be known.