How to cut a pipe evenly with a grinder
An angle grinder, which everyone calls an angle grinder, can not only grind, but also cut various materials using special wheels. But in order to skillfully use these opportunities, you must have knowledge and experience.
Many people have an angle grinder, but most people do not know how to use it correctly and how to hold it. This leads not only to work failure, but also to serious injuries. An angle grinder is a rather dangerous power tool.
The circle should be installed with the pattern facing up and clamped with a special nut.
The person with the leading right hand holds the grinder by the handle with his right hand. In this case, the circle should be located on the left side of the machine, and the protective cover should cover it on top. The rotation occurs in such a way that during cutting, sparks fly towards the worker. If the grinder's circle jams and the grinder breaks out of your hands, then it will not go towards the carver, but in the opposite direction.
The left hand holds the machine by the handle, which is screwed into a threaded hole on the body. There are several of them for special cases of use, but the correct position of the handle is only the upper one.
This position of the machine requires the use of protective equipment. To protect the eyes and the exposed part of the face, use safety glasses, or even better, a protective mask. To protect exposed parts of the body from sparks and small fragments during the cutting process, it is necessary to wear a suit made of thick material.
How to cut smoothly
To cut something evenly with a grinder, you need to make the correct markings. For example, before cutting a piece of pipe, you need to mark the size with a marker or thin chalk. Then we take a sheet of paper with a straight edge and wrap the pipe around the mark. We will get a paper pipe on top of a metal one. The border of the paper will be the exact trajectory along which part of the pipe will be cut off.
For these purposes, you can also use construction tape, which makes it easier to wrap the pipe and secure it. Draw a cutting line along the edge of the paper or tape. We remove the paper, heal the pipe in a vice and cut it with a grinder.
You can cut a corner, profile or sheet in a similar way. Just don’t forget that you can’t change the position of the machine while cutting. Misalignment of the circle will lead to jamming or breakage. Do not press too hard on the circle, especially thin ones. The deformation will immediately be reflected by curvature. The machine should eat into the material itself, you just need to hold it.
The evenness of the cut also depends on the correct selection of the wheel. It is difficult to achieve an even trajectory when cutting off part of a thick-walled pipe with a thin circle.
How to cut a circle with a grinder
Sometimes it is necessary to cut a circle on a sheet of metal, but there is no tool other than a grinder. To do this, mark a circle on the selected area with a white marker or thin chalk. The cutting line should be on the outside of the circle so as not to reduce it.
We install the grinder not perpendicular to the sheet, but at an angle. Moreover, the grinder will lean towards the center of the circle. At low speed we make a preliminary contour cut. Both the contour and main cuts must be performed with short movements, moving the position of the circle along the contour.
You can do the same when working with other materials. To cut a circle in a tile for a pipe using a grinder, you need to make a mark on the back side of the tile. Then take a grinder and make slots along the chord inside the marked circle at a distance of 4-5 mm from one another.
Then the tile is turned at a right angle, and slots are made perpendicular to the previous ones. During cutting, pieces of tile will crumble, but within the outlined circle. The remaining teeth can be sanded with a grinder, first from the front side.
Naturally, the cut will be oblique, with an extension to the back side. But this edge can be gradually grabbed with pliers and chipped away. At the end of the operation, the back side of the hole is sanded. This will require accuracy, attention and patience.
How to cut tiles and porcelain stoneware with a grinder without chipping
To avoid chipping when cutting tiles, it must be moistened with water. This will promptly reduce the temperature, which causes destruction. In this way, you can not only cut the tiles, but also cut out the necessary fragments. Another method is to use a stone cutting wheel. This circle does not crack or chip.
The situation with porcelain stoneware is a little more complicated. Porcelain tiles are somewhat thicker than regular tiles and are stronger. A manual tile cutter becomes dull very quickly without achieving results. Therefore, you can cut porcelain stoneware around the stone.
We make a contour cut along the drawn cutting line. Then another, a third. Until the uncut thickness of the material is less than the cut thickness. We move the porcelain tile to the edge of the table and break it with a sharp, but not very strong movement.
How to saw without dust
Any dust is harmful to human health. During renovation or construction, it settles everywhere. Cleaning it up afterwards takes a long time and is quite difficult. But the main thing is that it cannot be removed from the body. In order to work without dust, you need to make a small and inexpensive device for an angle grinder.
This device is very similar to a medical IV. We insert a dropper tube into a regular plastic bottle with a volume of 1.5 - 2.0 liters. We leave only the regulator on it. In the protective casing of the angle grinder we make a hole along the diameter of this tube. We insert another similar tube into this hole.
We connect these two tubes, pour water into the bottle and open its supply to the circle. After the first rough cut, we adjust the water supply, which should extinguish all the dust released during cutting.
With such a device you can process concrete, brick and many other materials that, when destroyed, emit a large amount of dust.
How to properly saw or cut with a grinder
Different materials behave differently when processed with a grinder. Some immediately overheat and break, others become deformed, and others do not want to be processed at all. It’s difficult to know all the intricacies of working with an angle grinder, but practice requires knowing at least something.
We cut paving slabs, tiles, porcelain tiles
To cut paving slabs with a grinder, you will need a special circle with a diamond cut. Markings are made on the tile, and along this marking a cut is made to almost half the radius of the circle. If the grinder has a large circle, then in one pass you can cut the tile to its entire depth at once. The main thing is that it is no larger than the radius of the circle. If the radius of the circle is insufficient, the tile is turned over and a counter cut is made.
Tile without chips is better processed with a stone cutting wheel. A line is drawn on the tile along which a contour cut is made. Then the depth gradually increases. When the cut part becomes larger, the tile is placed on the edge of the table and broken along the line. Unevenness and roughness can be worked on later.
Porcelain stoneware can be processed well with a stone wheel. The cutting technology is no different from the technology of cutting tiles.
Cutting wood with a grinder
Compared to other building materials, wood has always been and remains the most flexible in processing. The grinder produces a wide variety of discs for cutting wood.
The most common blade, the look of which we have long been accustomed to on a circular saw. The peculiarity of selecting such a disk is that the calculated speeds of the grinder and the disk must match. Only in this case it is possible to trim smoothly and without burning the wood.
This blade easily cuts wood in any direction, but traditionally prefers to cut across. It is easy to cut not only raw wood, but also tree knots. It is convenient to spread the boards into beams or slats. For a large volume of such work, the grinder must be fixed permanently. The result is a complete analogy of a circular saw.
Pressed wood materials of any density are also very easy to process. And, if it is necessary to cut a wooden panel filled with nails, then a disc is available for such work. He is not afraid of encountering nails. This universal disc is made from tungsten carbide by Bosh. The disc is marked Bosh Carbide Wheel. Available in sizes 76, 115 and 125 mm.
Grinder for brick, concrete, concrete ring
Cutting brick and concrete is done using special stone wheels. Brick is easy to cut, the main thing is to secure it correctly before cutting and not to use your foot as a clamp.
Concrete slabs or concrete can be cut with virtually no problems. But the concrete ring creates some problems. Not the concrete itself, but the steel reinforcement embedded in it. The circle in the grinder experiences a large load during concrete, and the reinforcement causes damage to it.
To shorten the ring by a certain amount, a cut is made from the outside of the ring. Then the cut part is broken with a sledgehammer, and the protruding reinforcement is cut into a circle for metal.
Corrugated sheets, metal and sheet metal
The grinder was originally intended for cutting and grinding metal, so cutting any metal is its element. For sheet metal of different thicknesses, select a circle of a certain thickness, select the rotation speed and perform the cut along the drawn lines. When approaching the extreme point of the cut, you need to recess the grinder a little so that the cut border does not have a bevel.
Cleaning sewer pipes at home
Using this technology, you can cut out different geometric shapes from a sheet of metal. To cut a square or rectangle, you need to draw dimensions on a sheet of paper. We place the circle of the grinder outside the square and make a cut in the metal. When all four sides are cut, cut out the corners.
Cutting corrugated sheets does not cause any difficulties. The cut starts from any edge or in the middle, if required. The only caveat is that when cutting thin metal, a torn cut is formed on the reverse side. To avoid injury and for the cleanliness of the work, it is better to sand this cut.
Cutting pipes and gas cylinders with a grinder
A large diameter pipe, like a gas cylinder, is not an exception in the operation of an angle grinder. A large diameter pipe can be thought of as a sheet of metal. It is difficult to cut a cylinder that contains a trace of gas or condensate. This is very dangerous due to possible explosion.
To ensure safe cutting of the cylinder, you need to unscrew the valve. This is difficult to do, because over time the thread grows tightly together. In this case, it is necessary to weld the cylinder by the stand, which is located in its lower part, to a massive plate or frame.
It is easier to unscrew the valve on a welded cylinder. Water is poured into the vacated hole until it overflows, and then they begin cutting with a grinder. Cutting a cylinder is no different from cutting a large diameter pipe.
Glass cutting
The grinder has no problems when cutting glass. For this operation, you can use the cheapest ceramic wheel. A light contour cut is made and then deepened. The cut glass is laid out on the edge of the table and broken.
Cutting glass pipes with a grinder can be considered using the example of cutting an ordinary glass bottle. The bottle is placed in an extended vice or placed between two wooden blocks. Turning it little by little, make a cut with a grinder. The bottle is rotated until the unnecessary part simply falls off.
How to cut slate without a grinder
If you don’t have a grinder, you can cut the slate sheet using a regular hacksaw. A hacksaw with fine teeth and a slight gap is better suited for this work. As a last resort, you can use a hacksaw blade from a hacksaw for metal, or just a knife.
The main thing is to correctly distribute the forces and load on the sheet to avoid chipping and breaking the slate. Wave slate is somewhat more difficult to cut, but a sheet of flat slate is easy to cut with any tool.
Source: https://potolki-72.com/kak-rovno-obrezat-trubu-bolgarkoy/
How to cut a pipe straight at any angle
When doing repairs or laying new communications, you often have to look for the answer to the question: how to cut a pipe straight? There are many simple methods that can achieve the desired result when cutting pipes from any material.
How to cut a pipe straight at a 90 degree angle
When cutting a pipe to the desired size, there are several nuances. It is necessary to take into account: the material of manufacture, the angle at which it should be cut. If the angle is right, then the marking is performed as follows:
How to remove a disc from an angle grinder: methods, recommendations from experts
It is not advisable to make markings using a tape measure. When wrapped around the pipe, it breaks, making it impossible to draw an even circle.
How to mark at a 45 degree angle
Making markings at a 45 degree angle is more difficult. A small diameter pipe can be marked using water. If the piece is small, then this option will do. A pipe is lowered into a container of water at an angle of 45 degrees. Water leaves a mark on the surface that needs to be duplicated with a marker.
Using a paper template, you can mark a pipe of any diameter. It is done as follows:
The template is wrapped around the pipe and secured with masking tape.
It is difficult to cut the pipe straight at an angle. As a rule, a grinding machine with a large diameter wheel is used, even for cutting thin pipes. A large circle leads less to the side.
An interesting way to cut a plastic pipe
There are many devices for working with plastic pipes. There are special scissors that cut pipes with a diameter of up to 75 mm.
You can use a hacksaw or simply cut it with a grinder. But all these methods have drawbacks. Scissors cut at an angle of 90 degrees. But how to cut a plastic pipe evenly if a different angle is required or the large diameter does not allow their use? If you cut with a hacksaw, the slippery plastic surface does not allow you to cut according to the markings. It is possible to manufacture a device that is free of these disadvantages.
This tool combines a pipe guide (miter box) and a cutting device made of nichrome thread.
A nichrome thread is installed on the miter box at the desired angle. It is connected to the electrical network through a ballast resistor or rheostat. This will make it possible to select the desired temperature. After heating the wire red-hot, the workpiece must be lowered into the miter box. This will allow you to cut the pipe smoothly like clockwork.
Source: https://volk1.ru/instrumenty/1643-kak-rovno-otrezat-trubu-pod-ljubym-uglom
How to cut a round pipe straight?
Proper pipe cutting looks simple at first glance. This task is quite problematic, especially if it is necessary to make a cut at a certain angle or a cut of a complex configuration. This can be done either with your own hands or with the help of a specialized tool.
A lot here depends on the diameter of the product, the thickness of the wall, the material from which the pipe is made and, of course, the tool itself.
What specific tools exist?
Pipe cutting tools, like most existing tools, are not uncommonly handheld and electric. In both of these niches, for their part, there is a specialized, experienced and applied amateur tool (find out here how to cut a thread on a pipe at home).
For example, the question of how to cut a metal-plastic pipe can be solved in two ways.
On the one hand, there is an experienced pruner, but on the other hand, it is possible to use a simple hacksaw.
- If we talk about pipes made of different types of plastic, then for material with a cross-section of up to 75 mm, a lot of special scissors are produced; experts call them pruning cutters . Since plastic material is quite dense, all pruners are equipped with a gear mechanism that serves to increase the compression force. The price for such scissors starts from $10 and, depending on the quality, can reach up to $150.
- The next specialist in cutting plastic is a disc pipe cutter . If the pruning shears operate on the principle of simple scissors, then the cut is made using a sharp, heavy-duty disc. He presses himself against the wall and, rolling around it, makes an incision.
A pipe cutter is indispensable for thin-walled products, since cutting a metal-plastic pipe with a narrow wall with pruning shears is not easy due to the fact that it wrinkles.
- The question of how to evenly cut a pipe of enormous diameter is easily solved by specialists; for this purpose there is a guillotine adapted for cutting round products . Its operating principle is classic, with a knife on top and a semicircular bed on the bottom.
The device can be electrically driven and cut using hydraulics. In addition, there is a guillotine with a manual, screw drive.
- In addition, there are a lot of specialized machines . Thus, lathes are used for perpendicular cuts. If the question arises of how to cut a pipe at 45 degrees or at any other angle, then, in most cases, band saws are needed.
It is fundamentally important: the main difference between an experienced tool and an amateur one is that the cut is performed with particular precision. Plus, the edge does not require additional processing upon completion of the work.
- But the necessary device is not always at hand, and taking it separately is expensive and does not always make sense . A simple hacksaw for metal is considered a favorite among amateur tools. It can easily cope with both metal and plastic, the main thing is to mark it correctly, but more on that later.
- Every good owner invariably has an angle grinder . With its help, having a certain skill, it is possible to quite accurately unravel pipes of small and medium diameter. The big advantage of the grinder is that it can be used to work on any material, from polyethylene to cast iron or steel.
- At the end of our rating is a jigsaw. It is undoubtedly possible to work with it, but it is difficult to make the correct cuts, plus the edges of the pipe will need to be further refined.
A couple of tips for cutting pipes
The use of a tool such as a pruning shear or a disc pipe cutter does not require special preparation; it is easy to work with them. It’s a completely different matter when you have to use improvised means.
Making a perpendicular cut
There are a couple of points of view on the topic of how to cut a pipe at 90 degrees. As in any business, a lot depends on the correctness of the markings. The most reliable folk method is to use a paper page or masking tape.
It is easier to work with tape; you need to carefully stick it around the perimeter of the pipe, without creases or distortions. If both sides of the strip meet clearly, without shifts, then you already have 90?.
The product should be securely fastened before cutting, otherwise the pipe will rotate and you will not be able to unravel it smoothly. For perfection, it goes without saying, it is better to hold it in a vice, but in the countryside such luxury is not always available. A small diameter pipe can be tied to a stool or table.
To a product of enormous diameter, it is necessary to attach 2 wooden support bars in parallel, which will not allow the pipe to rotate. The most ergonomic way to secure it is with tape; a couple of turns made on both sides of the cut will securely fix the product.
Advice: before cutting the pipe evenly with a grinder, in some cases it is better to fasten it only on one side, leaving the other hanging. It is necessary to cut from top to bottom so as not to jam the disc.
Returning to how to cut a pipe of enormous diameter, it is necessary to note that such a product should be cut into sectors slowly with a hacksaw or grinder.
In the case of a cast iron pipe, the instructions are slightly different:
- It is necessary to make a shallow cut around the perimeter;
- Then, use a chisel and hammer to “tap” this cut;
- At some point, the pipe is bound to burst according to the markings.
Oblique cut
In this topic, the most pressing question is how to cut the pipe at 45 degrees. Among the folk methods, there is a unique marking method: you need to take a square sheet of paper and carefully fold it in half diagonally, after which it is wrapped around the pipe with the folded side. The ends of the page should meet, and the oblique border of the page will be the 45 degree mark.
Another alternative method is to use a basin of water. The pipe is lowered into the water at the desired angle. The boundary between dry and wet areas is marked and a cut is made.
But the most famous, simple and ergonomic device for corner cutting is the miter box. This tool is a U-shaped product made up of planks. The two opposing planks have the correct cuts at the right angle. The pipe is placed inside the miter box, secured and cut with a hacksaw according to the ready-made markings.
Source: https://tepliysezon.com/kak-rovno-otrezat-krugluyu-trubu/
How to cut a large diameter pipe straight?
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Question for experts: There is a large diameter pipe. How to cut it evenly (or rather, exactly draw a line for cutting)???
Best regards, Victor Grokhotov
Best answers
A sheet of paper with a diameter of more than 300 mm will not roll. Use roofing felt and chalk, as is done in Spetsstroy. The welders' results were drop-dead accurate.
Ivan Vasilyevich changes profession:
There is nothing simpler - you take a wide tape, wrap it around the pipe and draw a line. That's all!
You can only cut accurately on a lathe.
And approximately - the previous respondents correctly suggested.
Place it horizontally and pour oil on top.
The oil will leave a mark.
Here you can find all the options on wikimetall/metalloobrabotka/kak-rovno-otrezat-trubu
answer
This video will help you figure it out
Answers from experts
Pour paraffin and cut everything together. Or with a wooden mandrel. In short, take all measures so that the tube does not wrinkle when cutting
Is the tube reinforced? What is the problem?
with one swing or an ax cut off
cut - lengthwise.
And an even cut hints that the tube was cut off. So what is the question?
A blaster or a laser beam for the sake of it, there’s nothing simpler.
In order to correctly draw a cutting line, wrap a strip of paper around the pipe and mark the cutting line (for example, with a black marker). Then carefully cut with a grinder. Do the same with the second piece of pipe.
Then join both sections, placing them in the recess of a steel corner profile (or channel width less than the diameter of the pipe) and start welding. First, grab in three places (at 120 degrees), and then boil in a circle. The alignment of the welded sections will be ideal.
Using a grinder and adjusting it on a knife, don’t buy a pipe cutter just because of one pipe!
Wrap it in a sheet of paper and outline it with a pencil and cut it with a hacksaw for metal; after cutting, check it by attaching something even to the cut; for welding, a small cut error does not affect the welding.
experience will help you. you'll cut three dozen pipes by eye, like with a pipe cutter
Wrap in a strip of paper and mark with chalk. Cut with a grinder along the chalk.
Even if there is a slight unevenness of 3-4 mm, this is not a problem for the welder.
Source: https://dom-voprosov.ru/prochee/kak-otrezat-rovno-trubu-bolshogo-diametra
