The Vallorbe Double Bevelled File is a professional tool designed for sharpening full chisel chains. With a size of 2mm x 10mm x 2mm, this file offers precision and efficiency for square round sharpening. Perfect for advanced amateurs and professionals, Vallorbe chisel files are a must-have for any workshop. The term “square-ground filing” refers to the process of using a file to sharpen square-ground chain by hand. Square-ground filing can be much more difficult than round filing and requires different techniques. Because square-ground chain is less forgiving of errors, it is important that the corner alignment and filing angles be precise. Learning the proper method for square-ground filing can take time. In fact, most people don’t get it right on their first try. So, don’t get discouraged if your chain doesn’t perform the way that you expect it to on the first attempt. Things to Keep in Mind the First Time You File Square-Ground Chain While square-ground filing can be done out in the field, a shop with a light and a work bench is an ideal learning space. It’s easiest to file in a setting where your cutters are stable and there’s lots of light. The first square-ground chain you sharpen should be a square-ground chisel chain that still has its factory grind. Do not use an old chain – especially one that has been previously filed. A chain that has already been resharpened may still have gullet material attached that needs to be removed. Tip: A second, new square-ground chisel chain on hand can be a handy reference point for square-ground chain sharpening. You can look at the cutter teeth on the second chain to see what the cutter teeth should look like. Three Rules for Sharpening Square-Ground Chain Keep the corner of the file aligned with the cutter’s tooth Maintain the angles of the cutter’s tooth Repeat the same angles on every tooth; all cutters need to be the same.
