Glass Edge Processing

Glass Thickness & Customization

Glass edge processing can be customized for different glass thicknesses, dimensions and component geometries. Processing requirements may include edge type, edge width, chamfer size, bevel angle, corner radius and surface finish.

For OEM projects, customers can provide CAD drawings, technical drawings, samples or dimensional specifications. Our engineering team can review the requirements and determine the appropriate processing method for the application.

How to Specify Glass Edge Finishing for OEM Production

Specifying glass edge finishing correctly helps OEM buyers reduce drawing ambiguity, improve sample approval and maintain consistency in production. For custom cover glass, industrial display glass and optical glass components, edge requirements should be defined alongside glass thickness, overall dimensions and other critical features on the engineering drawing.

Before requesting a quotation, review the following specifications with your glass manufacturer.

1. Define the Required Edge Type

Different applications require different edge finishes. The appropriate option depends on the component design, installation method, visible edge requirements and assembly conditions.

• Ground edges: Suitable for applications where a ground finish meets the specified appearance and assembly requirements.

• Polished edges: Used when a smoother, more uniform visible edge finish is required.

• Chamfered edges: Include a defined chamfer dimension and, where necessary, an angle.

• Rounded edges: Specify the required corner radius or edge radius and identify the locations where it applies.

• Custom CNC edge profiles: Provide a detailed drawing or cross-sectional view for non-standard edge shapes.

Avoid specifying only “smooth edges” or “polished edges” when the finished part has critical dimensional or cosmetic requirements. Describe the required edge geometry and acceptance criteria as clearly as possible.

2. Specify Chamfer Dimensions and Corner Radius

For chamfered glass edges, indicate the chamfer width and angle on the drawing when these dimensions are important to the design. For rounded edges, identify the required radius and distinguish between rounded corners and a rounded edge profile.

If only selected sides or corners require special finishing, mark each location clearly. This is particularly important for cover glass with mounting holes, cutouts, printed borders or close-fitting housings.

Where dimensions are critical, confirm the applicable tolerances with the manufacturer before sample production. Do not assume that every edge treatment follows the same dimensional tolerance.

3. Include Glass Thickness and Overall Dimensions

Edge finishing must be considered together with the glass thickness and external dimensions. These specifications affect the available edge geometry and the manufacturing sequence.

The engineering drawing should identify:

• Glass material and nominal thickness

• Overall length and width

• Critical dimensional tolerances

• Edge type for each side

• Chamfer dimensions, edge radius or special profile requirements

• Relevant holes, notches and cutouts

For parts requiring CNC machining, see our CNC machining for cover glass page for additional information about custom glass features.

4. Define Edge Appearance and Acceptance Criteria

Terms such as “high quality,” “smooth” and “defect-free” can be interpreted differently unless the requirements are clearly defined. For production orders, specify the acceptable appearance of the finished edge and identify any critical areas that will remain visible after assembly.

Where necessary, agree on the inspection method, measurement locations and acceptance criteria before approving the production sample. Edge chips, scratches and other visible imperfections should be evaluated against the agreed specification rather than an undefined general description.

If the glass will be chemically strengthened or undergo another subsequent process, confirm the manufacturing sequence and inspection requirements with the supplier. Relevant process requirements may vary with the glass material, part geometry and intended application.

5. Confirm the Drawing Before Mass Production

Before placing a repeat order, review the approved sample against the engineering drawing. Confirm the edge profile, dimensions, visible finish and any critical assembly interfaces.

For OEM projects, the quotation request should include the latest drawing revision, required quantity, material, thickness and any special edge finishing instructions. This allows the manufacturer to review the requirements before confirming manufacturability, lead time and pricing.

For further information about post-processing, see our chemical strengthening glass page.

What to Include in a Glass Edge Finishing RFQ

To help prepare a more accurate quotation, provide the following information:

• Engineering drawing or sample

• Glass material and thickness

• Overall dimensions and tolerances

• Required edge type and profile

• Chamfer dimensions or corner radius, if applicable

• Cosmetic and inspection requirements

• Estimated order quantity and expected production volume

Need custom glass edge processing for an OEM project? Send your drawing and specifications through our custom cover glass inquiry page so we can review your requirements and discuss a suitable manufacturing approach.