A mosaic nipper is a hand tool for breaking small pieces of tile, glass or natural stone to size. The best-known version has two freely rotating tungsten carbide wheels that pass each other: you grip the piece between them and squeeze, and it fractures along the line the wheels press in. There are also nippers with two hard cutting edges (parrot-beak type) for ceramics.
The tool is meant for work that is too small for a tile cutter: mosaic tesserae, corners around a socket outlet, and irregular shards for free-form mosaic work.
Application
- How to hold it. Take only about a third of the piece between the wheels; the break line runs on by itself. Gripping the whole piece produces more shattering
- Squeeze, do not twist. One steady, controlled squeeze gives a cleaner edge than a hard grip or a twisting motion
- Glass. Glass mosaic breaks sharp. Wear safety glasses and gloves; splinters fly
- Straight lines. For long straight cuts in ordinary tiles, a score-and-snap cutter or a wet saw remains the better tool. The nipper shapes pieces; it does not cut to a measured line
- Maintenance. The wheels must turn freely and stay sharp. Ceramic wears them; on most nippers they can be rotated or replaced
- Cost. A usable mosaic nipper costs roughly 15 to 40 euros. More expensive models add a return spring, an adjustable stop and replaceable wheels
Working sequence
- Lay the mosaic sheet out dry and mark where it needs to be cut
- Cut the sheet to shape with scissors or a utility knife
- Trim the loose edge pieces with the mosaic nipper
- Take the sharp edges off with a rubbing stone or a fine file
- Bed the pieces in the adhesive, keeping the joint width the same as on the sheet
Related terms
- Mosaic
- Tiling
- Tile cutter
- Tools
- Natural stone
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