Proper edge treatment is critical to the overall performance of any glass substrate, affecting functionality, strength and cleanliness. At Coresix, we have the capability to apply the correct edge for every application and the knowledge to provide the most efficient and cost effective solution to your glass needs.

Edging Terms

  • Edging - A grinding process performed to remove the sharp, raw edge of a glass component. Edging is done for various reasons including safety of handling, protection from chipping, promotion of cleanliness, improved dimensional tolerance and mechanical function.
  • Bevel
    Generally describes a well defined size and angle to be ground on one or more edges. A bevel is usually specified for a cosmetic or functional purpose and requires a CNC or mechanical operation to achieve the required precision.

  • Ground or Milled Edge
    Refers to the processing of the entire edge (usually all edges of the part) including top, bottom, and sidewall through a CNC or mechanical operation.

  • Chamfer
    Typically describes a uniform grind on the top and bottom of all edges with defined tolerances. Chamfers are most commonly applied with CNC grinding or other mechanical operation, though small components are "hand chamfered" on a grinding wheel.

  • Seam
    Is usually used to describe a less critical edge treatment - often a "safety seam" or "edge break" with the primary purpose to remove sharp edges.

CNC Edging Operations

Our precision grinding stations are extremely versatile, offering a wide degree of flexibility in our process design. While the illustrations depict the most common edge and corner specifications, we can custom design and produce nearly any edge or corner profile to meet specific application requirements. Our equipment is also capable of multiple tool changes within a single program, providing precision placement of features including notches, flats, holes, windows, pockets, etc.

Whether running a multiple pass with a high-grit tool for an extremely fine edge finish, or performing a hand seaming operation to maximize cost savings, Coresix will engineer the edge that is right for your needs.

Radius Corners With CNC edge grinding stations, corners can be rounded to any preferred radius with a tolerance of +/- 0.20 mm. Radius corners offer the best protection against chipping and breakage due to the elimination of sharp points. 45 Degree Corners A typical 45° corner "cut" or "dub" can be applied by CNC edging or by hand edging operations (tolerance depends on operation). An optional 2x5 or other odd corner can be applied for orientation purpose.
Radius Edge 

*Edge profiles illustrated with 3mm and 1.5mm thickness for example only and can be applied to any thickness with some limitations below .5mm


Machine Edging Close up     Human hands Edging Close up     Machine Edging Close up alternate angle