Measuring Method for the Edge and the Wear of Blade of Sickle, Cutter, Mower etc.

Abstract

A method for measuring the top edge angle and top edge width of blade has been deviced. The interior deformation of blade at its top edge was caught on the thin solder plate of 20×20×1mm, and was measured by microscope. The blades of a rotary mower and a sickle were much more worn at their top than at their end. In this experiment, the cutting limit of top edge width of a rotary mower was about 70μ, and that of a sickle about 30μ.