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  • Cutouts

Cutouts

Above ø60 mm the “holes” are treated as cutout. This circular hole is called "fan cutout".

Of course, not only circular cutouts, but also other forms of cutouts are possible.

The shape of the cutouts - depending on their location and size - occasionally happen already during the glass processing (see ’The cut of glasses’), otherwise it happens by means of the milling tool of the glass-working CNC machine. In other cases, the edges of the cutouts are processed with a router.

Cutouts can be placed on the glass:

  • Surface (Interior),
  • Edge,
  • Corner.
Cutouts CE Glass Industries

Interior cutouts

To make an interior cutout, first we make a hole/holes and form the opening with a milling tool to the desired size and form.

As to their function, these cuts usually serve as a means of opening, i.e. lock cutouts, connector openings, cat doors, etc.

Interior cutouts CE Glass Industries

Similarly to holes, there are some limitations for the cutouts regarding their dimensions and placements:

  • The interior cut’s size (w/h) cannot exceed 1/3 of the width or length of the glass.
  • The distance between the edge of the inner cutout and the edge of the glass should not be less than half the length of the cutout side perpendicular to the edge being studied.
  • The inner corners of the cutouts should be rounded, with the min. radius r = 6mm.

Size tolerances in cut size:

  • Maximum permissible deviation of cutout dimensions (w/l): ± 3mm.

Dimensional tolerances in the position of the cutout:

  • When measuring the location of the cutouts, , one corner of the glass must be selected as the point of start, then, along imaginary perpendicular lines measure the distance of the selected reference point of each cutout to the starting point.
  • For glass with a maximum length of 2000 mm, the tolerance is ± 2,5 mm,
  • For glass with a maximum length of 3000 mm, the tolerance is ± 3 mm,
  • For glass with a length above 3000 mm, the tolerance is ± 4 mm.

Above 12 mm glass thickness the tolerances increase by 1 mm.

Possible machining of cut edges:
The edges of the cutouts can be machined by a tool that can physically fit into the cutouts and the rounded inner corner of the cutout with the smallest radius If the ø65 diameter polishing tool can go around the edges within the cutout, it is possible to grind the edges with P-FMF polish (see: Polish). In other cases, the edges of the cutouts remain polished with the M-FMF.

Edge cutouts

Like the interior cutouts, edge cutouts are created by milling tools.

As to their function, these usually serve as the place of fixings, or the place of the elements to be fitted on the edge of the glass: e.g., hinge cutouts, door handle cutouts, etc..

Edge cutouts CE Glass Industries

Restrictions on dimensions and positions:

  • The edge cutout (w/h) cannot exceed 1/3 of the width or length of the glass,
  • The distance of the edge of the cutout to the glass edge cannot be less than
  • 1/2width of the cutout, but it must be at least 100mm,
  • The inner corners of the cutouts should be rounded, with the min. radius r = 6mm,
  • The distance between the cutouts cannot be less than ½ of the larger cutout’s width.
  • The width of the cut is the cut depth perpendicular to the cut edge.

Size tolerances in cutout size:

  • Maximum permissible deviation of cutout dimensions (w/h): ± 3mm.

Dimensional tolerances in the position of the cutout:

  • When measuring the location of the cutouts, a starting pont must be selected at one corner of the glass, and along lines perpendicular to each other, measure the distance of the selected reference point of each cutout from the starting point.
  • For glass with a maximum length of 2000 mm, the tolerance is ± 2,5 mm,
  • For glass with a maximum length of 3000 mm, the tolerance is ± 3 mm,
  • For glass with a length above 3000 mm, the tolerance is ± 4 mm.
  • Above 12 mm glass thickness the tolerances increase by 1 mm.

Possible edge polishing of the cutouts:
The edges of the cutouts can be processed with a tool that can physically fit into the cutouts or into the inner corner with the smallest diameter of the cutout. If the ø65 diameter polishing tool can go along the edges inside the cutout, it is possible to polish the edges P-FMF (see: Polish). In other cases, the edges of the cutouts remain polished with the M-FMF.

Corner cutouts

Their production - depending on their shape and size - is made on the cutting table or with milling tools.

As to their function, they usually ensure that the glass can be installed, i.e. they give the final functional shape of the glass according to its purpose, and serve as a place for the fixings in the corners.

Fine polishing of the corners can also be done by grinding technology, that is the corners may be gounded or cut off. These operations are not considered corner cutouts (see: Polish).

Corner cutouts CE Glass Industries

Restrictions on dimensions and positions:

  • The size of the corner cutout (w/h) cannot exceed 1/3 of the width or length of the glass
  • The inner corners of the cutouts should be rounded, with the min. radius r = 6mm.

Size tolerances in cutout size:

  • Maximum permissible deviation of cutout dimensions (w/h): ± 3mm.

Dimensional tolerances in the position of the cutout:

  • When measuring the location of the cutouts, a starting point must be selected at one corner of the glass, and along perpendicular lines, measure the distance of the selected reference point of each cutout from the starting point.
  • For glass with a maximum length of 2000 mm, the tolerance is ± 2,5 mm,
  • For glass with a maximum length of 3000 mm, the tolerance is ± 3 mm,
  • For glass with a length above 3000 mm, the tolerance is ± 4 mm.
  • Above 12 mm glass thickness the tolerances increase by 1 mm.

Possible edge processing of the cutouts:
If the ø65 diameter polishing tool can go along the edges inside the cutout, it is possible to polish the edges P-FMF (see: Polish). With these kinds of cutouts occasionally other types of edge processing may be done, depending on the shape of the glass lite, its center of balance and other parameters. In case otherwise instructed by the client, the edges of the cutouts remain polished with the M-FMF.

In addition to the above restrictions, the tempering of the cutout glasses has separate - based on experience – limitations (see: Tempering Tempering conditions). During the fixings, or even during intended usage, along the edges of the cutouts tension may increase in the glass, leading to glass breakage. In accordance with the limitations of tempering cutout glasses, CE GLASS recommends the tempering of such glass lites, reducing the risk of glass breakage!

CONTACT

‌  6763 Szatymaz II. area 65. Hungary

‌ +36 70 620 2002

‌  ceglass@ceglass.hu

  Opening hours: Mo-Thu 8AM - 5PM

 E-mails received after Thursday 5PM will be processed on the following Monday

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