How to cut glass with a circle. Choosing the Glass

How to cut glass properly with a glass cutter

For more than 2 centuries, glass has been an essential part of every home. This material is used in the production of windows, mirrors, photo frames and many other interior elements. Hard, but at the same time incredibly fragile glass, has certain features of processing, fundamentally different from concrete, plastic or brick. Cutting this material is a very fine and precise process that requires special tools and certain knowledge. In this article we will try to give you the most detailed description of glass cutting process, and tell you about a few important nuances that will be useful in your work.

Starting the procedure for cutting glass, be sure to take into account that working with this material requires compliance with safety rules, neglecting which is not recommended. In its untreated form, the glass has sharp edges that can easily cut the skin and cause infection. Protect your hands with gloves and wear clothing with sleeves to avoid cuts. Because glass tends to break into small, sharp shards, we strongly recommend wearing safety glasses.

The place where you cut the glass must be level and steady. It is categorically not recommended to do this operation on a knee, a loose stool and other doubtful surfaces. Following this rule will minimize the risk of the glass falling on the floor, as well as make the work more comfortable and improve the quality of the cut.

If you have had no previous experience with glass and do not yet know how to cut with a glass cutter, we recommend that you do not disregard the above recommendations. It is possible that some experienced masters can perform this operation with eyes closed on a knee, but for beginners it usually goes not so smoothly. Inexperience can lead to many mistakes such as catching a sharp edge, dropping the glass on your foot or jamming the cutting area and getting a shrapnel in your eye. If you are working with glass for the first time and have not yet experienced the process, it is best to be fully armed.

How to cut round glass?

Now let’s look at the easiest way to cut round glass. To do this, you need to take the glass cutter and tools to cut a straight circle. First mark the center of the circle on the glass, then attach the suction cup to the place where you marked the center. To the installed suction cup tie a rope, and to the rope should be tied glass cutter. The length of the rope from the suction cup to the cutter must be equal to the radius of the circle you want to cut. When all preparations are made, the circle on the glass can be drawn with the glass cutter. Now from the circle on the rest of the glass to draw “rays” with the glass cutter. And then use pliers to break off the extra pieces that are between the previously held “rays”.

It is better to make a marking of the cut line with a felt-tip pen beforehand. Experienced glaziers grasp the glass cutter and ruler at once.

Append it to the sheet, deviating 3-4 mm from the desired line when working with a diamond tool, and 1-2 mm when working with a roller glass cutter. Hold it like a pencil: perpendicular to the sheet (see pencil). Figure. 2). the trimmer line quickly and easily with one move of the hand. The table must not wobble or vibrate during this operation.

if the diamond glass cutter is operated correctly, a faint crackling sound is heard and a thin, barely visible scratch remains on the glass.

The roller glass cutter is pressed lightly, and the trimmer line gets a deeper, whitish.

The sheet is then moved to the edge of the table so that the trimmer line protrudes by 3-4 mm. Then, holding the glass with both hands, break off a piece with a light but powerful downward movement. If the trimmer line follows all the rules then the glass is not too thick and practically separates on its own. Sheets thicker than 5 mm should be first slightly knocked on the cut line on its underside with a glass cutter mandrel or a rubber mallet. If the desired piece of glass is very narrow, it is broken off with pliers.

Typical mistakes of beginners home masters:

  • too slow in drawing the line with the glass cutter;
  • excessive pressure on it, resulting in a deep groove with uneven edges;
  • repeatedly drawing it along the line of the cut for more reliability;
  • Release pressure on the glass cutter a few millimeters before the edge of the glass.

Cutting glass with a diamond saw

If you need to cut round glass and do not have a glass cutter or pipe cutter, you can use a diamond saw. The diamond saw is a smooth band of diamond where the teeth of an ordinary saw are.

In order to work with the diamond saw it is necessary to cut out a template of the circle to be cut out from cardboard or plywood. Afterwards the cut out stencil must be glued to the glass. When these preparations are done, you can start sawing with the diamond saw. In the process of sawing the glass from which the circle is cut out must be constantly moistened with water, so the process of cutting round glass must take place in the bathroom. If you decide to cut a circle out of glass with a diamond saw you need to be patient and cut with great care.

How to cut glass without a glass cutter

Before we get into the details of glass cutting techniques, we want to remind you of safety. Always wear work gloves and safety glasses to prevent cuts and small pieces of glass from getting into your eyes. Be careful not to put too much pressure on the glass.

with a flaming thread

A very common method mostly used for cutting glass bottles. Straight glass can also be cut with this method, but with a little nuance. All you need to make an even break in the glass is a piece of woolen thread, a flammable liquid (alcohol, kerosene, etc.) and a container of cold water.д.) and a container of cold water.

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Soak the thread in flammable liquid and fix it on the glass along the cut line. Light it, wait for complete burnout and immediately put it in cold water or pour it on the place of heating. The main thing is to make sure that the glass cools down as quickly as possible and breaks from the temperature difference. A characteristic click will signal the success of the work done. If the glass is not cracked, you can try again.

This method is quite even when breaking bottles, but it does not always work with large glass sizes. As it is very flammable and requires a fire extinguisher on hand or a container of water, which is already mandatory.

Soldering iron

Having marked a line on the glass for the trimmer of the future cut, take a file and make with it a small groove at the very edge. With 1-2 mm of distance from it, heat the place with the soldering iron until a micro-crack is formed between it and the groove. Then we step back from the crack itself at the same distance, and gradually move on to the finish point. It takes a long time to cut glass this way, but you can achieve any shape. To speed up the process a little, you can periodically cool the glass by putting a wet rag to it.

With scissors in water

A simple method of directional glass piercing. Allows you to easily cut a round shape, but is not suitable for creating straight lines. For this cutting you will need scissors and a container of water, which will serve as a kind of lubricant. The maximum thickness of the glass should not exceed 4 mm.

glass, circle

The process of cutting with this method is very simple. Take a piece of glass to be cut, immerse it in water, and use scissors to cut off small pieces from the edges. Water will not cause the glass to crack, allowing you to make a controlled cut. You can get oval and round shapes this way.

Diamond disc

Not the safest way to cut glass, it requires a high level of care and must be obeyed. Can easily chip glass and launch splinters in any direction. Otherwise, the method is quite effective and can cope with the task. For cutting you need a special tool (angle grinder, drilling machine or drill) with a diamond wheel of thickness 0.1mm.

The cutting process itself is quite simple, but requires a certain amount of skill and a steady hand to guide the tool cleanly along the line. Lay the piece of glass to be cut on a flat place, then take the cutter and run the trimmer blade on the glass surface. The main thing is not to plunge deep into the glass, but only slightly touch it, so that a small groove is formed, similar to a wide line for a trimmer from a glass cutter. The next step is to simply break the glass where you want it.

To reduce the chance of the glass breaking and to reduce the amount of glass dust, you can periodically sprinkle the place where you cut the glass with water.

Using a file

Another way to cut glass at home without a glass cutter or expensive power tools. You will need a file and some experience in working with glass. Note that a file must have corners, so a round one will not do.

glass, circle

To cut glass, it is enough to make a few cuts on its surface with the file’s corner. It is necessary to press a little harder than average to create a clean groove similar to a glass cutter. When the place of the bevel is marked, simply break the glass on the edge of the table or put a match under the place of the cut.

This method requires a certain skill, and if you are faced with cutting glass for the first time, we strongly recommend to practice on small, unnecessary splinters before proceeding to the main material.

Using a glass cutter

If you know what glass cutting is all about, here is another way to cut glass without using a glass cutter. With some experience, one drill bit with a pobedite tip may be sufficient for this operation. The main thing is to make sure that the drill bit is more or less new, with sharp angles on the head.

The process itself of cutting glass with a glass cutter is very similar to the usual roller cutter. The differences are the higher pressure force, but otherwise all operations are standard. We lay the glass on a flat surface, mark the trimmer line for the cut, attach the bar, and guide the trimmer line down along it from top to bottom. Before you cut, turn the ending so that the sharpest corner makes contact with the glass. Once we have a clear line for the trimmer, break the glass along the cutting line.

How to cut glass without a glass cutter

You can also cut glass without a glass cutter. Very often the most simple scissors are used for this procedure. To cut a fragile material with scissors, place it in warm water and under it cut pieces of your desired size. Ordinary glass will be cut with scissors no more difficult than cardboard or other durable paper.

If you need to cut a large piece of glass, you can put it in a bowl or bath of large size. Then run the sharp part of the scissors across the glass and break off unnecessary parts of the glass. To avoid cutting yourself on the sharp edge, wear gloves beforehand. At the same time, it is desirable to also protect the eyes.

No more than 3 mm thick glass can be cut with these scissors. Figures can only be cut with straight contours. In advance, it is imperative to prepare a template and glue it to the glass, using glue. It is worth noting one interesting point: the more water will be over the glass, the easier it will be to cut the future product.

You can also use a twine, some hot liquid and a small vessel, which needs to be filled with cold water. On the glass you need to make the necessary marks, then impregnate the twine with alcohol or gasoline, fold it on the marks and set fire. Immediately after the fire goes out, you need to pour a thin stream of water with a trimmer line. In this place, the glass should definitely crack. Then break off the glass along the crack that has appeared, and grind all the edges with sandpaper. If the crack did not appear, it is necessary to repeat the whole procedure once again. You can cut out very complex shapes in this way, it all depends on how you lay the twine.

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“About cutting out circular and curvilinear fragments in glass”. Calipers, roller glass cutter, template, grooved glass, showcase glass.

In the previous part of this article, we talked about how you can and should cut glass with a roller glass cutter, we looked at the option where straight elements are cut.

We’ll begin our conversation today by talking about cutting round and curved pieces.

There is a way to cut round glass using a caliper, glass cutter and rubber. A disclaimer must be made here. The fact is that many publications talk about using only a roller (and not the glass cutter itself) in this device, which, in turn, is attached to the jaw of the caliper. The term “Mounted at” which naturally raises the following question “how it’s done?”. calipers are made of tool steel. This indicates that the material is heat-treated in order to improve its performance properties. Depending on how hardened the steel is, you can judge how it is treated. In this case we are interested in the ability to attach the roller to the jaw of the caliper. If only the surface of the tool has been hardened, get rid of “capricious” The layer can be cut with a diamond. Scraping off this layer, the home handyman will be able to process the metal. After that he will spend a lot of effort to make a cut for the roller and fix it.

It is much easier in this device to use the roller itself, not taken out of the glass cutter. True, the tool will suffer, because its appearance will be altered. In particular, it will be necessary to make a cut in its handle, allowing it to pass into the jaw of the caliper. This cut should be in line with the center of the roller. Otherwise when the glass is cut the roller will not move. The handle itself may have to be shortened so that the top of it rests against the ruler of the tool. it is also desirable to make a small cut at the top of the sawed-off part of the handle of the glass cutter (for better fixation). In order to communicate “upgraded” the glass cutter with a caliper sponge was better, the homemaker can use a wire that will pull the glass cutter harder against the sponge. Perhaps such a design will not be distinguished by aesthetics, but will be a faithful assistant to the home craftsman in solving the problem of cutting a round hole of large diameter in the glass product. The second sponge can be secured to the glass with a piece of rubber into which this sponge will be inserted.

The device, which by right can be called a tool, is installed on the surface of the glass. At the same time, the sponge with the rubber band is pressed to the material, and the handyman rolls the sponge with the glass cutter around. If we are talking about thick glass, then after you have done the operation it is necessary to once again “go over” around the outlined circle, holding an ordinary (not “modernized) glass cutter.

Round glass is removed in the same way as described for rectangular (square) glass items, that is, by tapping the other side of the glass with the glass cutter.

There is another way to cut round glass. For this, the home handyman will need a suction cup, a nail, an L-shaped rail, and a roller glass cutter. The design is quite simple to assemble. On one side of the rail (where the rail does not form an angle. “Г”) a nail is hammered into the suction cup with its sharp end. On the L-shaped side of the rail the glass cutter is attached. For a better fixing, two holes can be drilled in the handle of the glass cutter to coincide with the two drilled holes on the rail (on the right-angled part of it). Using two screws and two nuts, the glass cutter is attached to the rail and the appliance can be considered ready-made. The handyman begins to twist the slat around the suction cup thus making a circular cut.

The described methods allow you to cut glass by applying the same amount of force during the work, which almost guarantees “company success”.

Circular glass can also be cut using a pre-designed template. But this method will lead to success only if the glazier presses the glass cutter with equal force, without stopping the movement of the tool, and this can only be done by a professional.

The curvilinear glass-cutting is done using the template. Curved pieces are cut from plywood, particle board, fiberboard, or cardboard. The thickness of the glass cutter must be taken into account, i.e. the thickness of the glass cutter must be deducted when marking the template. To prevent the template from sliding on the glass, it is advisable to glue some pieces of plaster or cloth insulation tape on its inner side. The home craftsman must hold the template with one hand, and with the other make the cut from one edge of the curved fragment to the other. In the case where the curved lines touch the edges of the workpiece at several points, “unnecessary” The glass is removed by the familiar method of tapping with the glass cutter along the cut lines on the “back” side of the glass.

But it often happens so that the curved fragment is located inside the workpiece. In this case to extract the fragment it is necessary to make several straight cuts from the edges of the fragment to the edges of the glass plate, and then the home handyman removes “unnecessary” pieces one by one. This method should also be used when cutting reinforced glass. In this case “unnecessary” The fragments will be held in place by the reinforcing mesh (wire). Break the resistance, and with it the wire itself, by bending and unbending “armature”, until it breaks.

Ribbed glass containing a pattern should only be cut on its smooth side, regardless of the nature of the cut (straight or curved).

It is desirable to cut float glass on both sides of the workpiece (also regardless of the type of cut). It is extremely important that the roller is perfectly sharpened.

As for curved glass cutting, there is another way to avoid using a glass cutter in your work. In this case, it can be replaced by a soldering iron. First you should make a notch in the “starting point” line, then along the attached ruler (if it is a straight cut) or along the template (if it is a curvilinear cut), the home handyman should run a hot soldering iron. The glass piece will begin to crack along the outlined line. After removing the “unnecessary” After removing the piece, you can start edging.

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How to cut a circle out of glass

In order to be able to cut a circle out of glass, you can use several different ways, which may differ depending on the diameter of the future circle and, of course, the thickness of the glass.

The easiest and most common way to cut an even circle is to use a circular glass cutter. Usually it’s rare to have such a tool in the household. But for this purpose you can also use an ordinary tool.

How to cut a circle out of glass properly with a glass cutter video

First of all, you will need to mark the central part of the future product and fasten the special suction cup on it. Then to this suction cup need to tie a strong thread or fishing line for trimmer length equal to the radius of the planned circle. Tie the glass cutter to the end of this rope. Tighten the rope as much as possible and then run the trimmer line tool in a circle around the suction cup. When the circle is drawn, it is very important to additionally make ray lines, which allow you to eliminate unnecessary pieces of glass around the finished piece.

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How to Cut Glass

Relying on the previously calculated dimensions, proceed to cut the sheet. If you perform this operation correctly, you will be left with minimal waste, which if necessary, you can use for other work. The line for the trimmer markings should preferably be applied with a special pencil “glassblower.

Using a template or ruler mark the beginning and the end of the cut. The ruler should be held with reference to the distance between the lateral surface of the glass cutter and the cutting edge, which is usually 3-4 mm from the cutting line. Place the glass cutter on the marked point for the beginning of the cut and set the ruler against it. Before cutting it will not hurt to run a finger over the place of the cut. so you can not only remove the dust that has formed, but also maximally concentrate on the upcoming work. Some masters apply turpentine to this place, which can be useful when working with thin glass.

Push down on the ruler and then trace the cut from the beginning to the end. Try to do this so that the force and speed of the movement remains constant. When you are nearing the end of the cut it is advisable to relax the force, otherwise you might get a crack.

For the correct execution of the cut piece, stick to the following algorithm:

  • Move the sheet to the edge of the table so that the cut trimmer line aligns with the edge of the table and then break the sheet quickly.
  • If you work with glass that is more than 3 mm thick, we suggest that you put an even, smooth wooden bar on it strictly along the line of the cut. Then proceed in the same way as before: break the sheet sharply along the line. This method is relevant for cuts longer than 1 m.
  • Move the sheet to the edge of the table and then, by applying light strokes with the glass cutter from below along the cutting line, create cracks in this area. If you do it correctly the crack will be visible. Then go over the line with the glass cutter again to enforce the crack. When doing this, be sure to support the sheet in case it breaks on its own, as this work can sometimes cause unexpected chips.

Sometimes it happens that the chipping is only in a few places behind the cutting line. Then you have to chip off unnecessary pieces. To do this safely and efficiently, you need to use the cutters on the head of the glass cutter. Although you can try to do this and with the help of pliers, which should be applied in such a way that the jaws only slightly grasped the line for trimmer cutting. In rare cases, the handyman has no choice but to simply “chop” or “pluck” extra pieces with the tools at hand. Be careful, however, as this can cause cracks. To avoid their formation, we advise to first treat the area with turpentine.

To continue work with cut fragment of glass without risk to be injured, and also to give an attractive look to the edges we advise to blunt them. The following tools will help you with this:

  • Sharpening block.
  • Old file. If the glass has a large thickness, we advise using a personal file, and for a thin one, a velvet.
  • Sandpaper to wrap around a block of wood.

Before you process the edge with a file, it must be moistened, and it is advisable to use a solution of turpentine with water or kerosene, which are taken in equal quantities. Move file or other implement along an edge and only along it, exerting light pressure. If it is necessary to grind the edge, then you need a grinder. Here, too, you must first moisten the place of treatment with a solution of turpentine with water, and after you finish the cut must be washed to remove glass dust.

Cutting glass is an operation that can only be performed correctly by professionals. Therefore, if you are going to cut glass with your own hands for the first time, you need to be thoroughly prepared for this work. Keep in mind that in order to cut glass properly you need to prepare not only the necessary tools, but also a place for cutting. But most importantly. you must learn how to do it correctly.

Even if you study a lot of materials and watch master classes on how to cut glass, it is not always enough to achieve the desired result. Therefore we advise to train by all means on an unnecessary fragment of the material and acquire minimum skills, without which it will be very difficult for you to cut glass correctly.

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