How to cut a round hole in glass

How to drill glass properly. How to avoid cracking the glass.

The need to drill through glass is quite rare, especially at home. Usually, when something like this is really needed, people turn to specialists. This is not surprising, because few people can even imagine how and what to drill glass. Costs such services are not cheap, so let’s figure out how to do this operation by yourself. The main thing. have patience and the necessary tools.

hole, glass


Before drilling glass at home, the material should be prepared:

  • Use alcohol or turpentine to degrease the surface and then wipe it with a soft, dry cloth.
  • When drilling, you should not allow the sheet of glass to slide.
  • The sheet must be placed completely on the base.
  • The area in which you will make the hole, it is recommended to mark with scotch tape or felt-tip pens.
  • If you have never drilled a hole, it is better to start by practicing on small pieces, so as not to damage the main sheet.
  • Creating holes in the glass is a slow procedure. Do not accelerate and do not force the material hard.
  • Hold the glass drill strictly perpendicular to the work surface. Also, do not make the entire hole at once. Sometimes you need to stop to let the glass cool.
  • If you are almost finished, turn the sheet of glass upside down and make a hole on the reverse side. This will avoid chipping and cracking.
  • To prevent significant bumps on the glass, use fine sandpaper.

So, you will need the following tools for this purpose:

Before you make a hole in the glass, it must be put on a flat surface. There are some nuances: the ends of the sheet should not hang down and/or wobble.

Select a minimum rotational speed on the power tool. The drill needs to be clamped in the chuck. Then you can proceed to drill the hole.

Degreasing the surface should be made with pure alcohol, and then in the area of the future hole should be molded plasticine recess. There should be added a little turpentine. Do not apply too much pressure on the tools so that cracks do not appear in the material.


If you need to create a straight and accurate hole in a glass surface, such as a glass block, it is not necessary to turn to experienced and qualified specialists, whose services are quite expensive. Such a procedure can also be performed with your own hands in the conditions of the home workshop, but, of course, for this you need to know how to drill glass, what tools, consumables and equipment to use.


Before asking the question of how to drill the glass at home, you should at least in general become familiar with the characteristics and features of this material.

Glass production is a complex process. It is performed at industrial enterprises equipped with special equipment. The main stage of this process is the preparation of the melt, which includes several components. The melt is exposed to rapid supercooling, which does not complete the crystallization process.

To prepare the melt, the mixture of components that make up the future glass, subjected to considerable heat. up to 2500 °. Depending on what the chemical basis of the melt, there is a distinction between glass

Oxide glass (aka silicate glass) is used to make bottles

Glasses, which can also be opaque, are divided into different types depending on the main characteristics possessed by the material. Thus, a distinction is made between glasses:

  • quartz, which is obtained by melting quartzite, also known as “rock crystal” (this material may be of natural origin and is found mainly in places where quartz deposits have been affected by lightning);
  • Optics, which are used to manufacture the main elements of optical devices (lenses, prisms, etc.); Optics, which are used to manufacture the main components of optical devices (lenses, prisms, etc.).);
  • highly resistant to the effects of aggressive chemicals and elevated temperatures;
  • industrial use (the most extensive category of glasses, including those used in everyday life).

The question of how to drill a hole in glass most often arises with the latter type of product. Products for industrial purposes, in turn, are also divided into several categories:

  • Potassium-sodium type (such glass, characterized by a clear and light internal structure, has a relatively low melting point, so they are often used to make glass products of complex shape);
  • Potassium-calcium type (this type of glass has a surface without a pronounced luster, is very hard and difficult to melt);
  • lead type (such glasses have a bright luster, which makes them very similar to crystal, high brittleness with rather high plasticity of inner structure, considerable specific weight and higher price, if you compare it with the cost of products of other types;)
  • borosilicate glasses (they are highly resistant to temperature changes and mechanical stress, and are rather expensive).
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In most cases, you need to drill a window or showcase glass

There is also a classification of glass by purpose. Thus, different kinds of glass are used for:

  • glazing of windows and other translucent structures;
  • container manufacturing;
  • reduction of radiation levels;
  • glass fiber production;
  • protection of smartphone screens;
  • glassware production;
  • The glass is used in the manufacture of thermometers capable of measuring temperatures between.200° and 650°;
  • production of laboratory glassware (such glasses are distinguished by high thermal stability);
  • production of medical products (ampoules, tubes, containers for medicines);
  • fireplace screens and ovens (in such cases, heat-resistant glass is used);
  • making of electric bulbs (in this case, the so-called electric bulb glasses are used);
  • Production of incandescent lamps, X-ray tubes, ignitrons (this requires electro-vacuum glass);
  • making elements of optical devices. cameras, microscopes, telescopes, etc.;
  • In the manufacture of thin-walled chemical containers and other items that require high resistance to chemical and thermal effects (quartzoidal glass is used for this purpose, also known as vicor).

It is better to drill thick glass on a machine


To drill glass does not end with its cracking and complete destruction, it is very important to know not only how, but also what is the correct way to drill glass. There are a lot of tools on the modern market, some kinds of which can be used for making holes in the glass.

  • The drill, the working part of which is made of hard alloy and has the shape of a feather or spear, allows you to make a hole in the glass with a diameter of 3-12 mm. Using such a drill requires certain skills. However, even their presence and the utmost care in carrying out the work will not help to drill through the glass with this tool without small chips.
  • To perform a better quality drilling holes allows diamond drill bits on glass, the working part of which also has the shape of a spear. Such a tool with a diamond coating on the cutting part provides softer drilling.
  • Glass cutters, made in the form of a tube, are used when it is necessary to make a hole of large diameter in the glass. It is more convenient to use a tubular drill bit complete with a drilling machine.
  • When using brass drills with diamond-coated cutting edges, it is necessary to take care of their quality cooling, which is done by feeding water or turpentine into the machining area.
  • Glass pipe crowns that are made with a diamond coating on the cutting part also need proper cooling. If you don’t know how to cut a large-diameter hole in glass, this tubular drill bit can help you solve the problem.

The main types of glass drills

Wondering how to cut a hole in the glass so that the hole formed in it was the most accurate, and the glass itself is not cracked, it is important to know how to properly prepare it for processing. To drill glass with your own hands, it is necessary to perform the following preparatory actions:

  • Degrease the glass surface to be drilled with alcohol or turpentine. After that it should be wiped with a dry rag.
  • The glass sheet or mirror must be placed on a surface that prevents the product from slipping during processing.
  • The surface on which the glass sheet or mirror will be placed must be larger than the object to be worked on. Do not allow the edges of the sheet to protrude beyond its limits.
  • On the place to be drilled, it is desirable to glue a painter’s tape or a piece of plaster to prevent the tool from slipping.
  • The center of the future hole is marked with an ordinary marker.
  • If with drilling glass at home you are familiar only from the video, then to get practical skills it is better to pre-train on unnecessary glass fragments. This practice will allow you to drill through the glass well afterward.
  • Drilling holes in glass should be done as carefully as possible, without unnecessary haste. When doing so, minimal pressure must be applied to the tool used.
  • Glass and ceramic drill bit, which will be used to perform processing, should be placed strictly perpendicular to the surface of the product.
  • Do not drill into the glass in one pass, and stop it occasionally to allow the tool to cool down completely.
  • When a glass sheet or mirror is almost completely drilled, you should stop the process, turn the workpiece over and continue on the reverse side of the product. This approach will allow you to drill a hole in a mirror or sheet of glass as well as possible, minimizing the risk of chipping and cracking.
  • To make the edges of the hole you drilled even neater, you can finish them off with some more fine sandpaper.


Many home craftsmen are interested in the question of how to drill glass or mirror, not using a tubular or other special drill bit, but an ordinary tool. In order to perform such a procedure, you will need the following tools and consumables:

putting a 3 in. & 6 in. round holes in window in 5 sec.

  • Drill bit, which is usually used to drill metal, ceramic and tile material;
  • A slow speed drill, instead of which an electric screwdriver can also be used;
  • A piece of ordinary plasticine;
  • turpentine;
  • alcohol solution.

A bead of plasticine on the glass is needed to keep the coolant out of the drilling area

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Drilling itself is performed in the following sequence:

  • A sheet of glass or a mirror must be placed on an absolutely flat surface, and the edges of the workpiece must not protrude beyond its limits.
  • Degrease the glass area to be drilled with absorbent cotton soaked in an alcohol solution.
  • After fixation in the chuck of the drill bit for tiles and glass on the drill set the minimum number of revolutions. Before starting work, check the degree of run-out of the drill bit: if it is too high, the tool must be replaced by another.
  • On the surface of the glass to be drilled (in the place of immediate treatment), it is necessary to fix a piece of plasticine, in the middle of which a small depression in the form of a funnel is made. In such a hole is poured turpentine, through which holes in the glass.
  • In order not to throw away the cracked object after drilling, such a process should be carried out as carefully as possible, without applying great effort. The minimum speed of the drill chuck should be 250 rpm, and the maximum cannot exceed 1000 rpm.


Not many people know how to make a hole in the glass, using ordinary sand. You will need:

  • sand itself;
  • Gasoline;
  • A small amount of tin, which can be replaced by lead;
  • gas torch;
  • A vessel made of metal, as which it is acceptable to use an ordinary mug.

The surface of the glass to be drilled is degreased, as in all previous cases. In the area where the center of the future hole must be located, a hill of wet sand is poured, in which an indentation is made with a sharp object with a diameter corresponding to the cross-section of the hole to be created.

Making a hole with the help of molten solder

Pour molten tin (or lead) into the recess formed in a hill of wet sand, after which it is necessary to wait a few minutes. Then the sand is removed from the surface of the product, and a piece of metal alloy with glass is easily removed from the machined material, the dimensions of which fully correspond to the geometric parameters of the hole being formed. A gas burner and a metal mug are used to melt the tin or lead.

Drill Holes in Glass Easily Wine Bottles, Mason Jars ( in under a minute ! )

The cut made according to the above-described procedure is of high quality and does not require additional rework.


You can drill through the glass, making for this tool, which includes a diamond roller from the glass cutter and a metal rod. The diamond roller, which will act as a cutting part, is firmly fixed in the slot made on the end part of the metal rod. By fixing such a tool in the chuck of a drill, you can drill any item of glass, and the result will be of sufficient quality.

Homemade drill made of glass cutter

By hardening a regular drill bit, you can give it the ability to drill through glass. To do this, the working part of the drill bit should be white-hot with a gas burner, and then cooled by lowering it into the sealing wax.


How to drill glass correctly to get a high-quality result as a result? To solve such a problem, it is enough to adhere to the following recommendations:

How to make a hole in tempered glass

When there is a need to drill glass, most are likely to turn to professionals who will do the job for you, but not for free. In fact, the whole process of drilling at home is not as complicated as it may seem. In this article, we are going to figure out how to drill the glass, and how and what to do it with.

Standard drill bit variant

Many people try to carefully drill a small round hole in the aquarium for the aeration tube. So, how to do it correctly:

  • To perform the work in domestic conditions take a simple drill for metal. To create a hole, you will need a tool with the ability to regulate the speed.
  • You also need to prepare a small piece of plasticine and turpentine. A funnel is made of plasticine, into which turpentine is poured for cooling. A plasticine board is placed around the center of the future through channel. With the drill vertical and the RPM turned down, you can get down to work.
  • Before completing the process, turn the glass over and continue the manipulation on the opposite side to prevent cracking. Finishing of the edges of the obtained through channel is done with the fine abrasive rolled up into a tube.

If you follow the instructions, you will not have any problems.

How to make holes in the glass yourself

There is an ancient, but something now forgotten method of making holes in the glass. The space on the glass, where the hole should be properly cleaned from dirt and grease with gasoline, acetone or alcohol. Then on the washed place pour the finest damp sand and with a sharpened stick of necessary diameter make a funnel in the sand up to the glass. Melted solder (lead or tin is permissible) is poured into the mold prepared in this way in the sand. After 1-2 minutes, the sand should be dumped and the solder cone taken out. A straight through hole appears in the glass.

Making holes in the glass

There is an ancient but now forgotten method of making holes in the glass. The space on the glass, where the hole should be, is properly cleaned from dirt and grease by petrol, acetone or alcohol. Then on the washed place is poured the finest damp sand and with a sharpened stick of necessary diameter make a funnel in the sand to the glass. Melted solder (lead or tin is permissible) is poured into the mold prepared in this way in the sand. After 1-2 minutes the sand is worth dropping and taking out the solder cone. An even through hole appears in the glass.

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Drilling a hole in the glass

The hole in the glass can be drilled with a carbide drill bit. The secret of success of this operation. in the liquid to wet the glass. It is prepared from aluminium alum dissolved in acetic acid or from mixture (one to one) of camphor or turpentine. Around the drilling space is built a roll of plasticine. Liquid is poured inside the bathtub that is formed. The glass during processing must rest on a soft cloth.

Another way to make a hole in the glass

Another method of making a hole in the glass.For the work comes in handy hard metal drill bit for making a small tub, a combination of equal parts camphor and turpentine, as well as a piece of dense rubber.

Again on how to drill a hole in the glass

About how to drill a hole in the glass in 10-15 seconds. For this purpose it will be necessary to grind a thin file like a chisel and attach it to the chuck of the manual drill. Don’t forget to let the file cool down while drilling, even sharpen it once in a while.

Drilling a large hole in the glass

The drill bit is made from a piece of aluminum, dural or copper tubing 40 to 60 mm long. With the 1 st end of it hammered into a wood plug to a depth of 20-25 millimeters, and at the other end sawed triangular file teeth. Screw a small screw 4-5 mm thick into the stopper, so that its smooth part protruded 10-15 mm. The head is sawed off. Glued to the glass on both sides of a paper washer with a hole equal to the diameter to be drilled. The glass is placed on a piece of rubber. Pour a little bit of abrasive powder on the drilling space. Then insert the end of the screw, protruding from the plug, into the hand drill, smear the teeth with turpentine and then proceed to drill. When the tube will deepen into the glass no less than 1/3 of its thickness, the glass is turned over and the drilling is finished on the second side.

Cutting round glass

We offer the ability to cut rounded glass. A glass-cutter roller is attached to one jaw of the caliper. The other jaw rests on the glass through a rubber washer. The roller is rolled a couple of times in a circle and then 3-4 tangents are made with a standard glass cutter to facilitate glass shearing at the edges of the cuts. Sharp edges are deburred with a file or emery under running water.

Unconventional glass drilling methods

A thin steel drill bit heated to white is hardened in mercury or a piece of sealing wax and honed. Then prepare a saturated solution of camphor in turpentine, wet it with a drill bit mounted on a mallet, and quickly drill the glass, which in this case is wet in the point of information the named solution. With this method, you can drill through 1 cm thick glass in less than a minute.

In order to drill a hole in the glass, we recommend taking a triangular file, dipping it in turpentine and carefully drill the hole.

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You can also drill through the glass on the lathe with a copper rod, oiling it and sprinkling sandpaper. Particular attention should be paid to the hole when the drilling process comes to an end and only the last thin layer remains, as this can easily crack the glass

A few tricks for glass drilling

Features of the technology

How to drill glass if you do not have the necessary tools? There are several ways that can help in this case:

  • Using a regular drill bit, which requires a lot of care and takes a long time.
  • Drilling in water will help avoid overheating the drill bit.
  • Using a liquid to wet the drill.
  • Replacing the drill with a copper wire.
  • Drilling with a tube.
  • A sharpened stick.

Such options can be applied at home, if you have a desire to perform drilling glass with their own hands. The technique is quite simple.

How to cut a round hole with a glass cutter

Cutting glass with a glass cutter involves not only making horizontal lines with templates or rulers, but also creating some non-standard designs. One of these is to cut a round hole inside a solid piece of glass. To do this use the same glass cutter attached to a special leg, resulting in a tool similar to a compass.

The most common devices of this type are made with a rubber suction cup on one end and an adjusting cutter on the other. They are firmly attached to the surface of the glass and allow you to make ovals of varying diameters.

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