17. September 2024 / Sharpening of Mower Blades
To maintain botanical and baroque gardens, various cutting tools, including mower blades, are required. The lawns are cut with mowers, in this case with an 800 mm heavy-duty blade. In the picture, these blades are being roughly pre-ground on a belt grinder with coarse-grit sandpaper for a later fine sharpening. The many sparks are carbon explosions, ignited and burning due to frictional heat.