Breaker-grozier pliers, or groziers, are
pliers
Pliers are a hand tool used to hold objects firmly, possibly developed from tongs used to handle hot metal in Bronze Age Europe. They are also useful for bending and physically compressing a wide range of materials. Generally, pliers consist ...
used by
glazier
A glazier is a tradesman responsible for cutting, installing, and removing glass (and materials used as substitutes for glass, such as some plastics).Elizabeth H. Oakes, ''Ferguson Career Resource Guide to Apprenticeship Programs'' ( Infobase: ...
s to break and finish glass in a controlled manner, a technique known as grozing. They are dual purpose pliers, with a flat jaw that is used for breaking out scores and a curved jaw that is used for grozing flares from the edge of broken glass. Both jaws are
serrate
Serration is a saw-like appearance or a row of sharp or tooth-like projections. A serrated cutting edge has many small points of contact with the material being cut. By having less contact area than a smooth blade or other edge, the applied pr ...
d for removing flares and tiny points of glass.
Use
To break out a score, the glass to be removed is held firmly in the pliers, with the flat jaw on top of the glass near the score line. A sharp bend downward breaks the glass at the score.
To remove unwanted glass flares and unwanted points, the glass piece is held with one hand with the pliers curved side up. A gentle upward rolling scrapes the glass edge against the serrated teeth and removes unwanted glass flares. This removal process is known as grozing.
The tips of these pliers can also be used in a chewing motion to remove small sections of glass or nibble out deep inside curves.
Other tools
Glaziers also use single-purpose pliers such as breaking pliers, with two flat jaws, and running pliers, which apply even pressure on both sides of a score to make a controlled gentle break on the glass.
See also
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Architectural glass
Architectural glass is glass that is used as a building material. It is most typically used as transparent glazing material in the building envelope, including windows in the external walls. Glass is also used for internal partitions and as an ar ...
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Beveled glass
Beveled glass is usually made by taking thick glass and creating an angled surface cut ( bevel) around the entire periphery. Bevels act as prisms in sunlight creating an interesting color refraction which both highlights the glass work and provid ...
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Came glasswork
Came glasswork is the process of joining cut pieces of art glass through the use of came strips or foil into picturesque designs in a framework of soldered metal.
Final products include a wide range of glasswork, including stained glass and l ...
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Cathedral glass
Cathedral glass is the name given commercially to monochromatic sheet glass. It is thin by comparison with ''slab glass'', may be coloured, and is textured on one side.
The name draws from the fact that windows of stained glass were a feature of ...
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Fracture glass
Tiffany glass refers to the many and varied types of glass developed and produced from 1878 to 1933 at the Tiffany Studios in New York City, by Louis Comfort Tiffany and a team of other designers, including Clara Driscoll, Agnes F. Northrop, an ...
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Fracture-streamer glass
Tiffany glass refers to the many and varied types of glass developed and produced from 1878 to 1933 at the Tiffany Studios in New York City, by Louis Comfort Tiffany and a team of other designers, including Clara Driscoll, Agnes F. Northrop, an ...
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Ring mottle glass
Tiffany glass refers to the many and varied types of glass developed and produced from 1878 to 1933 at the Tiffany Studios in New York City, by Louis Comfort Tiffany and a team of other designers, including Clara Driscoll, Agnes F. Northrop, an ...
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Rippled glass
Rippled glass refers to textured glass with marked surface waves. Louis Comfort Tiffany made use of such textured glass to represent, for example, water or leaf veins.
The texture is created during the glass sheet-forming process. A sheet is f ...
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Stained glass
Stained glass is coloured glass as a material or works created from it. Throughout its thousand-year history, the term has been applied almost exclusively to the windows of churches and other significant religious buildings. Although tradition ...
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Streamer glass
Tiffany glass refers to the many and varied types of glass developed and produced from 1878 to 1933 at the Tiffany Studios in New York City, by Louis Comfort Tiffany and a team of other designers, including Clara Driscoll, Agnes F. Northrop, an ...
External links
Hydraulic Press Pliers Website
Pliers
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