Glass Shelf Drilling: Hole Preparation for Vitrines

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Glass shelf drilling means making precise holes in glass components for vitrines and partitions so that supports, pins or fixings can be fitted without stress on the glass. The holes must be planned from the drawing and the on-site measurements before any cutting begins, because glass cannot be corrected once it is drilled.

Why Hole Preparation Starts Before the Glass Is Cut

Glass shelving depends on accurate hole positions. A hole that is even a few millimeters off can leave a shelf tilted or put uneven pressure on the glass. For this reason, hole preparation is part of the planning stage, not an afterthought at the end of production.

At Techno Kol Uzi, the process begins with a written specification that lists each shelf, its support points and the type of fixing to be used. The glass is only cut and drilled after the client has approved this drawing, so that everyone works from the same information.

On-Site Measurement and Support Points

Measurement is taken on site, where the vitrine or partition will actually stand. Walls are rarely perfectly straight or level, so the measurer checks the real distances between uprights, the height of each shelf line and the position of any existing fixtures.

Record the distance from each wall or upright to every support point.
Check that the floor and wall surfaces are level where the unit will sit.
Note the required shelf load and whether the shelves are fixed or adjustable.

These readings become the basis for the hole layout on the drawing.

Planning Hole Positions on the Drawing

Once the measurements are confirmed, each hole is marked on the drawing with its exact position from a fixed reference edge. Using one reference edge for all holes on a panel reduces errors, because every dimension is taken from the same starting point.

The drawing also shows the hole diameter, the edge distance and whether the hole goes through the full thickness of the glass. Edge distances must allow the glass to stay strong around the hole, so the planner keeps holes clear of corners and of other holes.

Production: Drilling in the Workshop

Drilling is done in the factory on suitable equipment, with the glass firmly supported and kept cool. Glass is drilled slowly and with the correct tooling, and the holes are finished so that the edges are smooth and free of chips.

Checks before the glass leaves the workshop

Each panel is checked against the drawing: hole positions, diameters and edge finish. Any panel that does not match the specification is set aside rather than sent to site.

Finishing and Preparing the Parts for Assembly

Glass edges are finished before assembly so that they are safe to handle and free of sharp points. Metal components such as brackets, pins and supports are prepared with the surface treatment specified for the project, whether that is stainless steel finish or powder coating.

Parts are packed so that the drilled holes and polished edges are protected during transport and are not damaged before installation.

Installation on Site

On site, the shelves are fitted into the supports, and the fixings are tightened gently so the glass is not forced. The installer checks that each shelf sits level and that the load is shared evenly across the supports.

If the wall or floor differs from the measurement, the installer reports it before any drilling of the wall takes place, so the assembly can be adjusted to suit the real conditions.

Frequently asked questions

Can a hole be moved after the glass has been drilled?

No, drilled glass cannot be corrected, so a new panel must be made. This is why the hole positions are confirmed on the drawing and on-site measurements before production begins.

Why are the holes placed from one reference edge?

Using one reference edge for all holes on a panel keeps the dimensions consistent. It reduces the risk that small errors add up across the panel.

Do all glass shelves need the same hole layout?

No, each shelf is planned for its own length, load and support points. Layouts are adjusted to suit the specific vitrine or partition.

What should I prepare before the measurement visit?

It helps to have photos of the location, the planned dimensions and any details about the shelf load. The measurement is then taken on site to confirm the real conditions.

Common mistakes to avoid

The most common error is drilling from a rough measurement taken without checking the real wall or floor. Placing holes too close to the edge or to each other can also weaken the glass.

Our recommendation

Confirm the hole layout on a written drawing before any glass is cut, and check the panel against that drawing when it arrives on site. Ask for the reference edge to be marked clearly so the installation matches the plan.

Summary

Good glass shelf drilling starts with accurate on-site measurement and a clear drawing, followed by careful workshop drilling and a check before delivery. Planning at each stage keeps the finished shelves level, safe and ready for installation.

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