Truborez for steel pipes: overview of the types, indicating the pros and cons of each + instructions for use
The implementation of various communication, construction and repair and installation work involves cutting pipe material from steel into fragments of the required size. To do this, in everyday life, you can use a simple improvised tool, for example, a hacksaw for metal.
But it is more reasonable and practical to purchase a pipe cutter for steel pipes. This unit will speed up the process and make it much less complicated and time consuming.
Classification pipe cutters by type of drive
Modern models of pipe cutters, designed for cutting steel pipes of different diameters, differ in the type of drive.
Hand heldtools are considered the most simple and do not require special skills to use. Usually they are simply fixed in the processing area, take a few turns and get a fragment with a clear cut.However, this option involves the use of considerable physical effort and is not suitable for large-scale work.
ElectricThe units are made of stronger, wear-resistant materials, so they are suitable for active use, easily cope with intense loads and can cut steel pipes of any diameter, including large ones, with high quality.
Pneumaticpipe cutters are professional equipment. They provide high precision processing and quickly make the necessary cut.
Cut out pipes of any thickness (from thin-walled to 60 millimeter). They allow you to carry out the necessary work in a small-sized room and have the function of boring the internal diameter of the pipe for subsequent welding.They have high power and easily cope with increased industrial-scale loads.
Hydraulicpipe cutters do not require connection to the power grid, and in their work they use the principle of fluid pressure. Pumping through the pump, it acts on the piston and drives the unit. When water pressure decreases, the cutting elements return to their original position. Tools of this class are more powerful than manual ones, but they are inferior to electric devices in all respects.
The choice of the unit, first of all, depends on the amount of work that is planned to be performed. For one-time use, a simple hand-held tool is enough, and for large-scale events (such as laying communications on a personal plot), it is better to use the electric version.
If there is no opportunity to connect to the network, for domestic purposes you will have to consider buying or renting a hydraulic pipe cutter.In industry, the most productive use of pneumatic machines for cutting steel pipes.
Types of separation elements
Units designed for cutting steel pipes of different diameters differ from each other by the type of element that performs trimming.
Rollertools consist of 1-4 cutting and several feed rollers. The model with one lead roller makes it possible to process a steel pipe with a diameter of up to 50 millimeters, and a three-roller one easily copes with a part having a cross-section of up to 100 millimeters. However, it is extremely rare to get the perfect cut without roughness from the roller units, and this moment is considered the main disadvantage of the equipment.
IncisiveDevices are an iron holder covering the workpiece. High quality and durable material of the work item allows you to use the tool for cutting pipes of thin steel.The position of the cutters is additionally regulated depending on the thickness of the metal and the total diameter of the pipe. The movable part of the unit moves the threaded rod.
Simple models are equipped with only two incisors, and the rod element also performs the function of a handle. These devices are suitable for metal processing no more than 1 inch thick. For pipe material with thicker walls, you will need to buy special cutters. The main advantage of the units is the ability to get a perfectly smooth cut that does not require subsequent countersinking.
ChainedImpact modules resemble a chainsaw. They have a tensioning mechanism, swivel arms and chains with rollers. With this type of tool, it is possible without effort to cut single-layer pipe material with a cross section of up to 3 centimeters.
TurningThe pipe cutter operates by means of the same interchangeable rollers, which are securely fixed around the product. The unit is driven by a removable handle, and the working elements reliably and accurately cut. The main advantages of the device include:
- the ability to quickly cut pipe structures with a wall thickness of up to 19 millimeters;
- effective work in difficult conditions (under water, at the bottom of trenches, in trenches, etc.).
Of the drawbacks, only one stands out - the high cost of the apparatus, but in industrial production it quickly pays off. Therefore, the price does not become a stumbling block for owners of large enterprises engaged in commercial repair, installation, communication and construction activities.
A suitable pipe cutter should be purchased, taking into account the size of the pipe that will have to be cut, where exactly the work will be done and how important it is to get a smooth, neat cut immediately, which does not require further finishing.
Design features of the clamping unit
Another important feature of the units designed for convenient cutting of steel pipe material is the design of the clamping unit. It can be clamp, lever and screw.
Manual clamp or "lock" devices work quickly and cleanly, easily withstand significant operating loads and cope with pipes up to 12 inches thick and up to 324 mm in diameter.
They have one long handle and one auxiliary. Thanks to this design, the operator does not have to use excessive force for cutting, and the equipment is adjusted directly in the process.
A huge advantage of the equipment is the fact that a complete rotation of the device around the part is not required, so cutting of the material can be carried out in cramped conditions, confined spaces and even by rolling.
In lever models, the fixation of the part occurs by pressing on the lever, and in screw models it is held in a constant position by reliable and strong screw elements. To prevent the walls of the pipe from collapsing during processing, the part is clamped medium-strong and held in this position until the moment of cutting off.
How to choose a blade for the tool
For steel pipe cutters, some specific features are relevant, in particular, for working tool blades. For a good cut, they must have a hardness that is 15 ... 20 HRC higher than the hardness of the pipe material being processed.
This parameter can be determined by making a so-called “spark test”. It will reveal the approximate percentage of carbon and provide an opportunity to identify molybdenum, tungsten and manganese. In this way, it becomes clear what the initial hardness is and what kind of steel was used to make the pipe.
To carry out the test, the end part of the part is processed on an emery sharpener and the spark generated in the process is carefully considered:
- a more solid sparkling beam of light yellow color means low carbon unalloyed steel;
- about the medium carbon composition says the same in color, but a more branched beam with a number of bright flashes;
- standard quality steel gives a thin spark flow with short ramifications and the almost complete absence of flares;
- Alloy steel has high strength and does not show a tendency to brittle fracture. A stream of sparks shines thick and rich yellow, and instead of light flashes there are elongated shiny arrows.
Having detailed information about the quality of the steel from which the pipe to be machined is made, it is easy and quick to find the right equipment for cutting.
The principle of operation of manual models
In everyday life, the cutting of steel pipes is most easily done with a roller pipe cutter. This tool has several circular knives and easily copes with material with a diameter up to 100 millimeters.
For pipes of great length there are special devices, which are completed not only with cutting, but also guide rollers. This allows you to clearly fix the detail of any size and ensures its longitudinal stability during processing.
Large diameter pipes (150-200 mm) should be cut with a rotor assembly equipped with a telescopic mechanism responsible for turning the cutting rollers. These designs provide the ability to process parts in adverse conditions (pits, excavations, trenches, etc.).
In the rotary device, the rollers are mounted on the outer perimeter of the pipe. When exposed to a lever equipped with a mechanical amplifier, they are pressed against the surface of the workpiece.
Additional movements increase feed, and gradual separation occurs. The cut is carried out not so much by the effort as by the developed torque. The technology provides an even, smooth cut-off edge when working even with stronger alloyed steel.
What are electric pipe cutters
When are you planning to build a large-scale communication system or implement globalrepair and installation work, it makes sense to abandon the hand tools and give preference to the electrical unit. It functions perfectly both in stationary and field conditions and makes it possible to perform processing as quickly and cleanly as possible.
According to the type of construction, electropipe cutters are permanent and detachable. Non-detachable units are located on the outer surface of the part and are fixed by means of a self-centering clamp. They have compact dimensions and do not require a large space around the pipe in order to carry out full processing.
Detachable machines for cutting steel pipe material are easily attached to any part of the part.The device consists of interchangeable modules and is placed on the outer part of the surface.
Despite the fact that the work items occupy minimal space around the pipe, the cut at clipping is very accurate and does not require additional processing.
The cutting element in the device is a pair of incisors with a step of 0.01 cm. The electric motor operating from the 220 V network activates the tool.
Thanks to the high-strength split housing consisting of two parts, the unit can be put on an already functioning pipeline and quickly eliminate a sudden breakdown or carry out the necessary maintenance of any complexity.
To increase the processing speed of one of the cutters attached to the edge of the pipe, and the second in the process cut the chamfer. The device is fixed by special cams. Usually they are from 4 to 8 pieces.
For full control of all processes, the device is equipped with a servo.It provides an opportunity to closely monitor the torque and timely adjust the speed of cuts.
Preparation and cutting of steel pipes
Before you begin cutting, pipe material must be properly prepared.
- Moisten with oil the zone of intended separation. This will reduce the temperature of the metal during operation, clean the outer perimeter and partially remove scale.
- Using a clamp, fasten the pipe in the holder, focusing on the cutting line previously marked with a marker.
- Using the rod, move the cutting head around the perimeter of the part. Gradually increase the feed by performing the required cut.
- If the knives have the necessary strength and a good level of sharpening, the cut-off position will be smooth and will not require further processing.
In models designed for cutting pipes of small diameter (no more than 30 mm), the stem is combined with the handle. When it is set in motion, the clipping itself takes place.
How to cut a pipe of small diameter
For cutting steel pipe material of small diameter, the part to be processed is clearly fixed with a clamping mechanism of the pipe cutter.The tool handle is turned clockwise so that the cutting element comes into contact with the metal surface.
Then they make another turn of the handle, making sure that the beginning and end of the incision line are touching, creating a clear closed circle without interruptions and other violations.
If these parameters are met, the tool handle is shifted another half-turn, pulling the cutting element closer to the pipe. When the cutters clearly enter the metal, scrolling is accelerated a little and rotates with the handle until it cuts off.
Cutting steel pipes of large diameter
In everyday life, cutting steel pipes of large diameter is practically not in demand. Basically, the material of such dimensions is processed on an industrial scale. For this purpose, enterprises buy very powerful, expensive equipment.
If, nevertheless, a need suddenly arises in cutting large-diameter pipes, it is not necessary to acquire professional equipment. You can use the usual grinder, available in the arsenal of each owner, and, setting a cutting element for the metal on it, make a quick, accurate and high-quality cutting off.
But nevertheless, the Bulgarian is only suitable for the implementation of one-time reposcuring works. For regular large-scale events, it makes sense to get a more durable and strong unit.
Rules of operation and care
In order for the pipe cutter to serve for a long time and reliably, cut off qualitatively and not spoil the pipe walls during operation, it is very important to choose the optimum level of clamping of the steel part.Do not overstretch the workpiece too much. This can provoke a mismatch in the beginning and end of the cut line, creating an unaesthetic appearance of the screw thread on the part.
The rotation of the mechanism should be carried out evenly, but not very quickly. Otherwise, the walls will collapse and excess metal is formed at the cut-off point.
How to care for a pipe cutter
For correct and long-lasting service after work, the surface of the cutting roller, the feed screw and guide rollers are cleaned with a special agent, and then treated with lubricant.
The outer surface is inspected for dents or other damage, and chipped grind, so as not to interfere with the subsequent work. Cutting elements (cutter or roller) are examined for blunting and, if necessary, immediately replaced.
Storage pipe cutter left in a dry and warm place. After such procedures and comfortable storage conditions, the device will remain operable for a long time and will easily cope with all tasks.
Conclusions and useful video on the topic
How a pipe cutter works: a detailed video tutorial on how to use a manual pipe cutter equipped with a pipe clamp. Reliable unit has good power and copes with parts with a diameter of 32 to 365 mm. It is used not only in stationary premises, but also under water, in trenches of great depth or in places where high noise is unacceptable (houses, pipe racks, etc.).
Cutting steel pipes with a roller pipe cutter: the video clearly shows the process of cutting steel pipe material with a diameter of 3 to 150 mm with a roller assembly. The manual model copes well with one-time work, and the electric drive is suitable for more large-scale repair and installation measures.
Detachable pipe cutter for steel in work: how a detachable cutting apparatus works with steel pipes, it is perfectly visible in this video. The device has a useful function that allows partial cutting of the pipeline even without access to the end part of the system. The device is equipped with electric or pneumatic actuator and provides maximum cutting accuracy when using for work the minimum space around the pipe.
Knowing all the above-described nujs, it’s easy to find the optimal pipe cutter model.For additional advice before buying should contact the store staff. They will tell in detail about the proposed models and describe all the pros and cons of products of various brands.