カッティング
running pliers
Japanese: ランニングプライヤー
A tool used to run a crack along a straight line and split the material in one go.
Learn More
Running pliers are a specialized tool used to break scored glass; they are placed against the end of the score line to apply even pressure, ensuring the break runs smoothly. Align the central protrusion with the score line, clamp the glass between the side grips, and squeeze to guide the break along the score line. They are particularly effective for making long, straight cuts and breaking large sheets of glass.
When using running pliers, the basic rule is to align the central protrusion of the pliers with the score line, positioning it within 5 mm of the end of the score line. If the position is off, the strip will bend. Do not grip too tightly; apply pressure slowly and evenly, and wait for the strip to run through completely. For small pieces or scraps, double-pliers may be easier to use.
Related Concepts
These terms—run, breaking, and score—are used in sequence. Their usage differs from that of breaking pliers, which are used to assist with thumb breaks performed by hand.
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.