仕上げ
router bit
Japanese: ルータービット
A cutting tool attached to the tip of a grinder. Swap out different grit sizes.
Learn More
A router bit is a rotating cutting tool that is mounted on a table router or hand grinder to grind and shape the edges of glass. Electroplated types—in which diamond abrasive grains are bonded with a material such as nickel—are the most common, and the cross-sectional shape that can be machined varies depending on the bit’s shape (flat, ball, bevel, rouleau, etc.).
The coarser the grit number of a router bit, the faster the cutting speed; the finer the grit, the smoother the finish. The standard approach is to use a coarse-grit bit to shape the workpiece first, followed by a fine-grit bit for finishing. Always use the router bit with a constant supply of water (wet grinding) to prevent glass breakage caused by frictional heat and to prevent the bit from seizing. Replace worn bits promptly, as their cutting power decreases and efficiency drops.
Related Concepts
Understand these terms in conjunction with “table router,” “grit number,” “splash guard,” and “wet grinding.”
This entry is written in Japanese by Rei Chikaoka and translated for readers outside Japan. If something reads oddly, the original is the source of truth.