Lawn mower blades can be sharpened manually or mechanically. Manual sharpening requires tools such as a whetstone, wrench, and screwdriver, and the blade needs to be removed from the machine. Mechanical sharpening is much simpler; professional sharpening tools can be used, or the tool-grinding function of some household appliances can be employed.
Whether sharpening manually or mechanically, the blade must first be removed from the lawn mower, taking care to avoid injury to yourself or others. Then, slowly apply the whetstone or sharpening tool to the blade surface, simply grinding until the surface is smooth. Be careful not to over-sharpen, otherwise the blade will lose its original sharpness or become too dull, making it unusable for mowing.
