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The methods proposed here or there to succeed in a circular cutting of the glass are numerous. How to explain that most attempts are unsuccessful? They lack a craft trick, revealed here, that will allow you to carry out this business.

cut a round in glass

Practical advice

● The hammer is held to bring the blade just in contact with the glass.
● Avoid weighing the mass on the glass.
● Keep a margin of at least 5 cm from the edges of the glass.
● The crumbling of the glass can be accompanied by the projection of tiny sharp needles: protect the eyes with glasses and hands with leather gloves.
● It is difficult to cut a window pane in place.

Forget everything you saw at the cinema about cutting a tile to make a burglary. In the movies only, a round made with a diamond yields without much resistance.

Equipment

As for freehand cutting (read the sheet published in SD 708), the required material is quite limited: a glass cutter (a little over 20 € in GSB), a detonating ball, a glass cutter a brush, white spirit, multiple pliers, safety glasses and leather gloves.

The technique

Before starting, place the glass on a flat surface and adjust the spin knob (tool used by glaziers). It consists of a handle movable around an axis to obtain a circle to the desired diameter.
● With the instrument secured to the glass by the suction cup effect, perform a complete turn to engrave a first spherical pattern, then a second, smaller one, while exerting a constant pressure on the knob. The stripe is accompanied by a very characteristic squeak, comparable to that of an ice skate blade. The upper circle is that of the obvious to realize.
In a second step, the detonating ball will create a physical break in the thickness of the material, following the outline of the two circumferences.
● More effective than the glass cutter, the detonating ball "spin" the glass along the scratch (primer of the cutting line). By carefully observing the effect of the shocks produced by the ball, you will see a white line forming in the thickness of the glass, from the beginning to the end of the furrow.
● However, on a standard thickness glass (4 mm) as here, the edges of the break line are not sharp enough to allow you to remove the center disc, even with a suction cup. The area to be cleared will be broken up into small pieces by resorting again to the detonating ball. How? By placing the glass between the ball and the ram of a hammer.
● Oblique scratches - made beforehand with the help of the glass cutter - weaken the resistance of the material which will disintegrate until clearing the space necessary to pass the beaks of a clamp used as a choker.
● Once the cut is complete, consider softening the extremely sharp edges by sanding with a very fine sandpaper (on a wooden block) or a corundum stone.

Measure

Measure

The graduations on the handle of the spinet are difficult to read. Display the desired radius measurement from the center of the suction cup by sliding the wheel holder.

Position the cup

Position the cup

Use a clearance template on a sheet of paper to position the cut at the desired spot in the tile. Place a film of white spirit on the glass following the line.

Make a complete turn

Make a complete turn

Make a complete turn around the pivot without stopping your movement and without releasing your support on the wheel-holder. Hold the suction cup to avoid any risk of skidding of the cut.

Draw a second circle

Draw a second circle

Draw a second circle with the spin, a radius of about 2 cm. Light tweaks applied with a ball to detonate, just under the stripes, make "spin" the glass.

Scratch inside the first circle

Scratch inside the first circle

Use an ordinary glass cutter to scratch the inside of the first circle, trying to form diamonds. avoid, as much as possible, encroaching on the area between the two circles.

Blow dry

Blow dry

The secret of the circular recess is there: maintain the breakdown of a hammer just in contact with the glass. Then blow dry under the glass, using the detonating ball.

Operate from the center to the outside

Operate from the center to the outside

The mass of the hammer making a counter-blow, the propagation of the shock wave caused by the ball remains limited. The operation starts at the center and progresses to the edge of the first circle.

Complete the course

Complete the course

Without pliers to break the glass, finish off the clear with multiple pliers. Make small steps. It is longer but the risk of cracking the glass is reduced.

Methods for circular cutting of glass

FAQ - 💬

❓ How do you cut a circular glass?

👉 0:522:29How to Cut Circles in GlassStart of suggested clipEnd of suggested clipCut my circle. And now what I'm going to do by hanging it off I'm going to take my grossing plier.MoreCut my circle. And now what I'm going to do by hanging it off I'm going to take my grossing plier. And I'm going to gently. Just beginning to put some pressure. All the way around.

❓ What are the different ways to cut glass?

👉 Glass cutters and sharp knives are popular tools to cut or score glass and other materials. Saw blades can also be used for cutting thick glass sheets.

❓ How do you cut circles in stained glass?

👉 0:103:36How to Cut Circles in Glass | Delphi GlassStart of suggested clipEnd of suggested clipAnd you want to score from one side of glass all the way over to the other with a gradual curve andMoreAnd you want to score from one side of glass all the way over to the other with a gradual curve and you're going to do that all the way around on your circle.

❓ What is the simplest method of glass cutting?

👉 The process for cutting glass follows these simple steps:

  • Thoroughly clean the glass you intent to cut.
  • Lay the glass on a clean, flat, layered surface.
  • Measure the glass to the required dimensions.
  • Score the glass with a glass cutter, using a straightedge for guidance.
  • Snap the glass along the scored line.

❓ How do you use a circle cutter?

👉 0:342:19How to Use the Martha Stewart Large Circle Cutter

❓ How do you cut a glass mirror in a circle?

👉 0:104:18Cut a circle out of glass, cutting by a pro

❓ How do you cut glass into a shape?

👉 0:041:22Easy Way To Cut Complex Shapes On Sheet Glass - Glass Cutting InkYouTube

❓ Which is the best glass cutter?

👉 The Best Glass-Cutting Tools for Delicate Projects

  • Toyo Pistol Grip Glass Cutter. This glass cutter was designed with user comfort in mind. ...
  • Gordon Glass Silberschnitt Oil Glass Cutter. ...
  • Red Devil Professional Glass Cutter. ...
  • Delphi Mini Starter Kit.

❓ How do I cut a circle?

👉 1:1413:566 Ways to Cut Perfect Circles

❓ How do professionals cut glass?

👉 1:092:54How to Cut Glass & Mirrors

❓ What are circular cutters?

👉 [′sər·kyə·lər ′kəd·ər] (mechanical engineering) A rotating blade with a square or knife edge used to slit or shear metal.

👉 How to Cut Circles in Glass | Delphi Glass Delphi instructor Steena Gaut demonstrates two easy methods for cutting circles in glass. One involves a carbide wheel cutter (pencil grip or pistol grip) and a grinder, and the other involves the Glastar Circle/Strip Cutter. A third method is mentioned using a Bandsaw.

👉 It’s important to clean the glass before cutting to prevent any dirt or grit from stalling the tool’s cutting wheel. Set the clean plate glass onto the cloth-covered work surface. Next, mark the cut line onto the glass with a fine-tip indelible marker. However, the cutting wheel is offset from the edge of the cutter by about 1/8 inch.

👉 In actuality, cutting glass is not only easy, it’s also well within the capability of any DIY homeowner. All you need to make clean, accurate cuts in plate glass are a few simple hand tools and a little practice. But before getting into the specifics of glass cutting, let’s take a look at the tools you’ll need.

👉 Use a yardstick or a normal desk ruler. You need something that has a thick enough profile that it won't conflict with the wheel on the cutter. Apply pressure to the glass and you pull the cutter along the surface, rolling on the small carbide wheel. Listen for a smooth sound like ripping silk.


Video Instruction: 3 Ways to Cut a Glass Bottle - Compilation