Apilift. Not drawings, but pictures with dimensions

The TechnoKoleso company supplies industrial wheels for carts and technological vehicles, wheel supports for conveyors and conveyors, components for repair and installation on transport units. In our assortment you can find all types of wheels and rollers used for conversion and installation on technology, transport, garden and sales carts.

Constructions and types

The design of wheels and supports for industrial use should take into account the features and specifics of production, the operating conditions of the transport unit, interaction with surfaces and the crew. Special combinations of materials, fastenings and bearings are developed for this purpose.

The main types of wheels can be characterized by purpose and specific properties:

heat-resistant products for work in hot shops and on heated surfaces that do not deform under the influence of temperatures;
heavy-duty swivel wheels for cargo trolleys with rubber or pneumatic tyres;
rollers and wheels with one and two flanges for conveyors, movement on guides with a chute or rail type;
antistatic, conductive - for working in conditions with increased requirements for fire safety or on electric trolleys.

The choice of a certain type of wheel is determined by site conditions, where specific factors may be present. At the same time, the efficiency of technological transport, conveyors and conveyors depends on how often it will have to be stopped for repairs. With the right choice of industrial wheels and swivel castors for trolleys, the need for frequent repairs is reduced, downtime is kept within specified limits, and wasted time is reduced.

Materials and technical solutions

To give wheel supports of different types certain properties, various technological solutions and materials are used:

the combination of a polyamide bushing and a polyurethane tire makes it possible to achieve high strength and wear resistance of reinforced wheels for trolleys, without losing the smoothness of the transport on a flat floor of a warehouse or workshop;
steel bushings with rubber or pneumatic tires work well on difficult surfaces, including on the ground;
the use of supports with the possibility of rotation or a fixed position makes it possible to increase the accuracy of controlling the trolley, platform or create conditions for operational maneuvering in a limited space;
bearings built into the bushings are designed for extended service life, high travel speeds and high bogie stability on the travel path.

Fixed wheels for trolleys and containers are widely used in industries where strength and simplicity of design are of decisive importance in comparison with the ability to maneuver. Such a support can be mounted on technological vehicles moving along rails or guides.

Buy rollers, supports and wheels for production

The specialists of TechnoKoleso will help you navigate a large selection of industrial wheels, rollers, swivel and fixed supports, taking into account the specifics of the facility and the design features of technological vehicles. Pay attention to the need to select these products according to material properties, rolling diameter, bearing type and load capacity.

You can buy a set of wheels for carts, rollers, supports with a selection according to all the necessary criteria and optimal prices for your production profile. To clarify the details and place an order, please contact the consultants of the company!

A greenhouse frame with a square or rectangular section attracts with reliability and service life. A very durable metal structure allows maximum light to pass through, because its racks, supports, ties are much thinner than those of wooden rivals. Inferior metal in manufacturability. Without knowledge of the nuances, it is difficult to make an arched arc or a frame for a door from a straight blank. Because of these complications with a metal base, they prefer to buy "green houses" in vain. However, if you carefully understand how to bend a profile pipe for a greenhouse, you can build an inexpensive arched structure with your own hands at little cost.

The essence and problems of profile pipe bending

Bending of metal products, regardless of the shape of the section, consists in giving them a partial or complete smoothly curved configuration. One of the common locksmith procedures is performed either under pressure alone or under pressure in combination with heating of the bending section. At this time, compressive forces from the inner side of the blank and tensile forces along the outer wall simultaneously act on the processed part of the hollow metal workpiece. Complications are that:

the material in the process of changing the shape may lose the coaxiality of the segments, i.e. parts of the curved workpiece will not be located in a single plane;
the stretchable outer wall in the bending area may not withstand the impact and simply burst;
the compressible inner wall may, instead of a uniform contraction, fold into folds resembling a corrugation.

Without knowledge of the intricacies of profile bending, there is a risk of simply crushing the product, ruining the workpiece. But recklessness is not our way! Especially if it is accompanied by material losses. For the glory of rational economy, we will take into account all the whims of the profile and the characteristics of the "iron" material. Let's not forget about the dimensions of the section, the wall thickness of the profile pipe, the required bending radius and the elasticity of the steel alloy. Focusing on the specified parameters, we will choose the right technological path - it is also a bending method.

Why do you need to know the characteristics of the profile?

Profile pipe rolling differs from the standard round version in the shape of the section, which can be square, oval, rectangular or flat-oval. According to the GOST R regulation No. 54157-2010, a round product is also included in the list of profile products. However, in greenhouse construction, products with a square and rectangular section are most often used, for example, profile pipes 40x20 mm, because it is easier to attach a coating to their even flat walls.

For a variety of national economic needs, products are produced in a wide range of sizes. It differs in configuration and cross-sectional area and, of course, in wall thickness. The set of dimensions determines the plastic possibilities. In professional language, they are called the minimum permissible radius of curvature. So, before you learn how to make a blank for the frame, you need to find out what is the smallest radius of flat rounded deformation that the blank can “survive” without damage.

To determine the minimum allowable bend radius of a square or rectangular profile, we need the height h, because:

products with a profile height of up to 20 mm will bend without going into the category of unusable marriage if bending is carried out in a section with a length of 2.5 × h or more;
pipe with a profile height of more than 20 mm without loss will withstand deformation in a section with a length of 3.5 × h or more.

The indicated limits are necessary for those who plan to make shelving, shelves and frames for windows or doors. The wall thickness also introduces its own adjustments to the limitation area. Wide pipes with thin walls up to 2 mm thick are generally not recommended for bending. It is better to use welding.

Home craftsmen who decide to make arcs for, need to take into account that household products made of ordinary carbon or low-alloy steel alloys, after applying efforts to them, tend to “spring” slightly. They seem to be trying to return to their previous state. Therefore, after the novice locksmith completes the bending of all the arcs with his own hands, he will have to repeat the processing and re-fit the arches according to the template. It is desirable to initially take into account the value of the plastic modulus Wp. It is usually indicated in the documents of the building material being sold. The smaller the moment, the less fuss there will be with the fit.

Bending methods and their features

They bend profile pipes both in cold and hot condition. Heating with a gas burner will significantly increase plasticity. However, a material with a small cross-section bends excellently even without excessive temperature effects, because thin pipes are quite plastic and more easily succumb to the force applied to them.

There are no precise guidelines for applying heat to bending. The standards indicate only the dimensions of round bars, according to which it is necessary to act on the treated area with a flame at Ø 100 mm or more. With square and rectangular shapes, everything happens a little differently. Based on the experience of folk craftsmen:

with a profile height of up to 10 mm, the workpieces are unequivocally cold-bent;
with a profile height of 40 mm or more, the pipes are bent with heating.

How simpler and easier it is to bend a profile with a height in the range from 10 to 40 mm at home, the performer will have to decide on his own. If the master has a profile bender in his arsenal, it can be used to create an arched rounding without heating. There is no apparatus, it is better to test your strength in advance. To do this, clamp one end of the material in a vise. On the second end, put on a pipe larger than the height of the profile, and pull the “shoulder” enlarged in this way. If it worked out, it makes no sense to heat metal products.

Option #1 - bending with heat

We will deform the non-yielding material using the hot method, after filling it with sand. So the quality of processing will increase, and the uniformity of the bend will be ensured. Stock up on work "hot" with canvas mittens and proceed:

from scraps of timber or logs we will make two pyramidal plugs, the length of which should be 10 times the width of the base. The base area of each homemade cork should be almost 2 times larger than the square or rectangular hole that it has to plug;
let's try on how the plugs "sit down", then on one of them we will select longitudinal grooves on four sides. They are needed to release the gas that will accumulate when the filler is heated;
pre-anneal the workpiece at the site of the future bend;
prepare the filler. As it, we take clean building sand of medium grain size. In the absence of bulk building materials, we will use sand from a children's sandbox. We first sift it through a sieve with cells of 2 or 2.5 mm to remove gravel and gossips from the stuffing. Large inclusions on the surface of the pipes can form an unnecessary relief. Then we “pass” the sifted mass again, but through a fine sieve with cells of 0.7 mm, so that the dusty particles do not sinter when heated. All screenings, as well as the filler at the end of the action, will be returned to the sandbox;
calcinate the filler at a temperature of 150ºС;
we will hammer one end with a wooden plug, on which there are no channels for venting gases. Install a funnel at the other end. Depending on the size, we will install the workpiece at an angle or perpendicular to the ground. Through the funnel, we will pour the filler in portions. Periodically tap on the walls of the product from the bottom up with a wooden or rubber mallet so that the sand is compacted. A dull sound will be a signal of sufficient compaction;
close the filled blank with a second cork;
mark the heating area with chalk on the workpiece;
we fix the workpiece either in a vise with a template, or in a clamp. We set the material with a welded seam so that the place of the welded joint is on the side. It is undesirable to stretch or compress along the seam;
we will heat the marked area red-hot, and carefully give the workpiece the necessary shape. We bend in one step with a translational unsharp movement in a strictly horizontal or vertical plane;
after cooling, compare the result with the template. If everything is in order, we knock out or burn out the plugs and pour out the sand.

The described method is good for the formation of single corner bends, because it is strongly not recommended to heat the pipes several times. Metal from repeated temperature shock loses its strength. However, when creating a rounded arch, repeated heating is inevitable. After all, it is unrealistic to do the work in one go, and chilled to a light cherry shade, i.e. up to 800ºС, the workpiece can simply break.

Option #2 - cold method

Plastic deformation of profiled rolled products "cold" is carried out both with and without filler. Material with a profile height of up to 10 mm does not require filling. A thicker pipe is best filled with sand or rosin. An alternative to sand filler is a dense coil spring, the dimensions of which will allow it to be tightly installed in the cavity at the processing site. The spring gasket will prevent a sharp change in the section of the profile at the bend.

You can bend "cold" at home:

manually using the simplest devices such as bending plates, vices and mandrels;
using a mobile profile bender - an improved analogue of a manual pipe bender. The profile bender differs from the device for bending round pipes only in the shape of the recess of the working roller;
by rolling on a homemade or factory roll forming machine, which you can make yourself or purchase ready-made.

It is more reasonable and more profitable to rent technical means of mechanization of bending if they are needed for a one-time construction of a greenhouse. If in the future the construction of green houses for relatives and neighbors or the construction of a beautiful metal fence, for example, there is a reason to get your own bending machine.

Bending fixtures and machines

In the family of devices and units for bending, there are representatives of varying degrees of technical complexity. To begin with, we will consider the means for those who are puzzled by the question of how and with what help it is possible to bend a profile pipe without the use of special equipment. Then we move on to homemade rolling installations.

Variants of the simplest devices

The use of elementary "helpers" for cold deformation regulate the dimensions of the material:

thin tubes with a profile height of up to 10 mm are bent using a horizontal plate with holes. Metal pins, which play the role of stops, are rigidly installed in the holes. The product is bent, placing it between the stops installed in the holes according to the bending radius. Start from the middle of the workpiece and gradually move towards the edges. The disadvantages of the method are in the application of considerable muscular effort and in a rather low accuracy of deformation;
pipes with a profile height of up to 25 mm are bent using roller devices operating on the principle of a Volnov machine. The metal workpiece is firmly fixed in a vice, and physical force is applied to the workpiece through the roller. Bending is performed better and more evenly than in the previous case. But from the performer, by analogy, remarkable efforts will be required.

To form a bend with a large radius of curvature, such as arcs for an arched frame, fixed round templates with clamps are used to fix the workpiece. These devices belong to the category of plane-parallel plates. The workpiece is “placed” with force in a groove, the dimensions of which are equal to the dimensions of the pipe. Manually bent with a mandrel, the pipe takes the shape of a given contour.

Upgraded bending plate

If a home locksmith is not deprived of physical strength, for his own needs he will need a simple tool for a rather laborious deformation of a profile pipe. It can be made in the form of a panel attached with clamps to the desktop or to the workbench. In the case shown in the photo, the bending plate is welded to a metal pedestal, but here it is bolted with four bolts to the concrete floor of the workshop. To remove the device at the end of the work, it will be enough to unscrew the bolts. After dismantling, no fastening pins remain and do not rise above the floor surface, which means that nothing will interfere with movement and create traumatic threats.

The principle of manufacturing a working plane is extremely simple:

The bending plate is a panel cut from thick sheet iron.
The panel is welded to a profile pipe, which is installed according to telescopic rules in the pedestal post.
In the working plane, two holes are drilled for bolts, which are stops.
The bending radius is adjusted by installing nozzles of a suitable size on one of the bolts.
In order to maintain the alignment of the segments adjacent to the bend, a metal plate is installed above the workpiece, fixed with bolts.

The pedestal is multifunctional. Its owner has the opportunity to use it as a miniature workbench to perform an impressive number of plumbing operations.

Mandrel for profile pipe bending

The method is suitable for products with a wall height of up to 25mm. The master will need a large workbench and a significant amount of free space around the work area. One edge of the workbench is perforated with frequently spaced holes for fixing the mandrel and for choosing the optimal position of the part that fixes the pipe. The template for the upcoming plastic deformation is cut out of thick plywood. True, a plywood mandrel is suitable only for one-time bending procedures. If there is a lot of bending work to be done, it is better to weld the mandrels from a steel corner.

Using a manual profile bender

Significant amounts of deformation work require mechanization. Mass production of curved parts will take too much health from the performer. To facilitate bending, it is advisable to make a machine according to a drawing. They are mainly used for work with large-sized workpieces. The main working bodies of the manual unit are three rolls, two of which are fixed. Changing the position of the third movable roll determines the angle of bending.

If the methods described above are not acceptable, then the future owner of the greenhouse has two options - renting a manual installation or ordering the manufacture of rounded parts. The process of deformation of the workpiece was demonstrated by the video: it is up to the performer to decide how easier it is to bend the profile pipe - by repeated rolling or physical impact.

When working manually, it is important to follow the rules for bending profile pipes and not to make sudden movements. It is necessary to monitor the uniformity of deformation from the outer and inner sides of the rolled product. However, you should not be too upset about small wrinkles on the inside of the fold: they can be corrected with hammer blows. Before starting work, it is necessary to make templates from wire, chipboard or drywall for verification and obtaining a result corresponding to the project.

Compressors, machine tools, generators, racks, tables and other equipment that needs to be moved within a workshop, area or workshop are often mounted on wheels. In hardware and construction stores, there is a fairly large selection of this product, but the workmanship and materials from which these products are made often leave much to be desired. And the price of such wheels can be significant.

Why buy these wheels when you can easily make them yourself?

Let's start making metal wheels with our own hands

1. We cut rings from the pipe with a width of 30-35mm

2. We cut out squares from a sheet of metal with a thickness of at least 3 mm, the dimensions of the sides of which are 8 mm (approximately) less than the inner diameter of the pipe. In this case, the inner diameter of the pipe is 125mm, the square of the side is 117mm

3. We find the center on the square (we draw straight lines diagonally from corner to corner, their intersection will be the center of the square). From the center of the square we draw a circle with a diameter equal to the inner diameter of the pipe used (in this case 125mm). We cut the corners of this square with a grinder along the marked circle and drill a central hole (in this case 16mm)
We make a sleeve, the length of which is equal to the width of the rings cut off from the pipe 30-35mm with a hole in the center (in this case 16mm)
Center and weld the sleeve to the square

4. To maintain the same size, we put any spacers inside the rings (in this example, four nuts 10 mm thick), and scald from the inside.

The size of the wheels can be anything, it all depends on your needs and the material available for their manufacture.

When carrying out construction work, a bent profile pipe is increasingly being used. The design and manufacturing methods of these materials endow them with excellent characteristics.

Therefore, many are interested in how to bend a profile pipe at home. After all, such a need arises often.

It should be noted right away that profile pipe products have a more aesthetic appearance than their round "brothers". And bending can be done:

in a specialized workshop.
Independently, at home.

If preference is given to the second option, then you should know that for these actions you will have to have certain knowledge. Watch the video on our website and you will succeed.

Features of bending profile assortment

The fact is that when changing the configuration, the pipe is affected by two forces:

compression, which has an effect from the inside;
tension acting from the outside.

When a professional pipe is bent incorrectly, it changes its shape and loses the coaxial location of some sections. Also, a stretching wall may simply not withstand mechanical stress and become unusable. In addition to these problems, incorrect contraction and wrinkling of the inner wall of the folded workpiece can occur.

It is not uncommon for cases that it is easy to bend a pipe from a profile along a radius, but the workpiece is crumpled. After that, it is already suitable only for scrap metal.

The combination of these factors affects the unjustified increase in costs, which a serious owner will never allow. Therefore, despite the fact that this pipe range is quite flexible, you should not rush to process it, and before bending the pipe along the radius at home, it is important to study the technology in detail. This will be discussed further.

Technology should not be neglected. Only for a master armed with knowledge, the question of how to bend a profile at home will not create big problems. All recommendations on how to bend profiled metal products correctly are given by professional craftsmen who have studied this problem in practice for a long time.

The influence of the technical characteristics of the material on the choice of bending method

First, you need to know that the concept of "trade pipe" includes an assortment of any geometric configuration. But, to make it easier to understand, it is customary to call the profile assortment of the following form:

square;
rectangular;
oval, etc.

This is due to the fact that round types are placed in the design of a pipeline for supplying liquid or gas, where significant pressure is provided. A profile of a different shape is found in various household structures and structures.

Square rolled metal is distinguished by the cross-sectional index and the dimensions of the walls. Both of these factors indicate the minimum angle for bending rolled metal, at which it will not become unusable.

There are a lot of engineering nuances in the question of how to bend a product without a pipe bender. But you don't need to know all of them to work from home. But it is important to know the following.

Thin products with a cross section of up to 20 mm without a pipe bender must be bent in an area that is 2.5 times longer than the height of the pipe itself.
Thick rolled metal can be bent without a pipe bender in an area that is three times longer than the section. If this point is ignored, then the metal will crack on the outside or deform from the inside.
Bending a profile pipe is dangerous in one respect: the occurrence of a fracture at the site of the operation, as a result of which the part is sent for final marriage or for rework for smaller products.
The limiting condition is the following ratio - the minimum radius should not be less than two and a half dimensions along the bend section. For example, for a profile with a thickness of 40 mm, the minimum internal radius will be 40 x 2.5 = 100 mm.

Before bending a steel profile pipe at home, one more rule should be remembered.

After exposure, the pipe strives to return to its original shape. For this reason, if you bend on your own, without a profile bender, then it is better to bend a little more than is necessary according to the scheme. If you bend the workpiece a little more, then in the end the rounding will turn out as the scheme requires.

All these conventions must be taken into account before bending one or another rolled metal, otherwise it is useless to get enough of a high-quality end result.

Methods that are used to bend

Do-it-yourself bending of a profile pipe at home is done in the following ways:

Bending by means of special technical devices. People call them pipe benders.
Using various hand tools.
By using physical force. But, this is only true for small diameters.

If you make a bend at home, then you need to consider:

The amount of bend.
Manufacturing materials.
The value of the wall thickness.
Section.

IMPORTANT! Measures for the deformation of profile pipe-rolling products are carried out in acceptable norms, set to the cross section and wall thickness. During operation, it is necessary to control that the cross section does not flatten and that internal fractures do not occur.

See how to bend a professional pipe and common mistakes, and below is a video of the process.

How to bend over the mandrel

In home workshops, rolled metal with a wall thickness of no more than 3 mm can be bent using a mandrel. The best option for solving the problem, if you need to bend a professional pipe by 20 with your own hands, is a profile bending machine, on the upper part of which there is enough space for finishing equipment. Such devices perfectly cope with products with a diameter of 40 mm.

When changing the shape of the assortment by 20 and 40 mm, on the workbench choose the optimal space for installing the element for fixing. To facilitate the work on one side of the machine, there are holes that are located close to each other.

The problem of how to bend a profile pipe at home without a mandrel pipe bender is not difficult to solve. The required radius during deformation is obtained due to the installation of a special template. For its manufacture, thick plywood is used. But, if work on bending profile pipes is required to be done often, then you can make a template from a metal corner.

Bending with the use of internal countermeasures

There are many different ways to bend a pipe without a pipe bender along a radius at home. Here are some of them.

These methods refer to work using improvised means.

Any greenhouse, gazebo, and other home extension cannot do without the use of a bent professional pipe. And practice shows that the question of how to bend a profile pipe does not create any difficulties.

The most important thing during the deformation of a professional pipe without a special manual device at home is the safety of the pipe product itself. And home craftsmen solve the problem of how to bend the profile in the following ways:

finishing with a grinder or welding;
using a spring
filling of rolled metal with sand;
bend with water.

Each method on how to bend a professional pipe yourself without a pipe bender that a home master can use has its own advantages and disadvantages. You need to familiarize yourself with them in order to stop at the most optimal option for your conditions.
Watch the video

Bending without a pipe bender - cutting with a grinder and welding

Such devices use manual drives, but if you develop the design further, it may well be the starting point for developing your own business.

When dealing with flexible profiles at home, you need to consider a number of circumstances:

when purchasing profiles, make sure that they are all the same size and steel grade and belong to the same delivery lot;
when using welded profiles, orient the side with a seam to the inner radius, otherwise it may break;
when working with a grinder, do not forget to use protective equipment in the form of glasses or a mask;
it should be borne in mind that it is not always possible to bend the end sections to the required size, therefore, when calculating the length of the workpiece, it is necessary to take into account their length and cut off such pieces at the end of the formation of the part;
after installing the products in place, it is necessary to carry out anti-corrosion treatment of the metal and continue to do it regularly.

Bending services

Such a service could not but become a separate line of business development, since it involves the use of rather complex technological equipment in the industrial version.

Video - how to bend a profile pipe

Profile pipe bending services are also on the market and involve the execution of both radius bending and arch bending. Separation occurs in this way because specific equipment is used for each of these operations. In the first case, this is a pipe bender, in the second, a three-roll rolling.

It must be admitted that the price indicators for performing such operations are very acceptable, as follows:

the cost of one corner bend is 30 rubles;
one linear meter of an arched span will also cost 30 rubles.

In comparison with the cost of metal and delivery of material in the Moscow region, this is really practically for nothing.

Special devices for bending

Bending machines for such a process use those designed specifically for products of a certain type. You can buy a bending machine, or you can do it yourself at home.

Making a bending machine with your own hands

To create a bending machine, the best option is the manual view of the device. The design of the structure depends on the diameters with which to interact.

For pipe materials with a diameter of up to 20 mm, a simple fixture can be made consisting of steel pins placed in a concrete slab. The pipe inserted between the pins is bent to the desired dimensions.

But, when the diameter exceeds 20 mm, then for the construction it is necessary to develop more complex drawings of a bending machine for a profile pipe.

A pair of rollers with a round side section on the edges is fixed to a stable, powerful base. The radius of this face of the roller must match the diameter of the pipe product to be bent.

The workpiece is inserted between the rollers and its end is fixed. The other end is attached to the winch, and it is put into action. When the angle on the pipe reaches the required parameter, the winch is stopped.

ADVICE. The network provides many drawings of pipe benders prepared by craftsmen. The main thing to pay attention to is whether all the exact dimensions are in the diagram. Otherwise, the work of the bending machine may not be of high quality.

Watch the video

The whole process of creating a pipe bender with your own hands must be divided into the following steps.

Making shafts and fixing gears and bearings on them. The gears are fixed through the key. Bearings are advised to be purchased complete with supports.
Gears and chain are suitable for any machine. Parts from a foreign car are of better quality.
Using a welding machine, the base is welded, and the clamp shaft is screwed to it.
Next, weld the spring nuts and a platform for them.
Screw the support shafts at the bottom.
A tension chain is being built.
At the final stage, the handle is attached to the shaft. To it (to make it easier to bend), it is advised to use a handle that rotates.

Such a device quickly performs deformation by passing a tubular product through it.

The creation of such a bending machine is quite inexpensive. And such a device will come in handy in a private house very often, and in some cases it turns out to be simply irreplaceable.

These are the simplest pipe benders, after watching the video materials and studying the drawings, you can learn how to bend correctly and choose the best design option.

It is not difficult to cope with such a slave as making a bending machine, but it will save money. This saving can be about 20 - 30 thousand rubles.

Having made several motorcycle and scooter trunks from ordinary water pipes of different diameters, I was a little upset. The trunks were heavy. For bending thin-walled pipes, a mandrel pipe bender is needed, the cost of which was too high for me. I started looking for an alternative. The design of the trunk had to be rigid, but light, not requiring unnecessary operations during manufacture. As a result, my choice fell on square pipes with a section of 15x15mm. They do not need to be trimmed to join for welding, which means that a milling machine is not needed either.

Experiments began with the simplest manual pipe bender, made from a pipe cut and a corner. The pipe bender was attracted by the clamp to the workbench, and the pipe bent against its surface. The rib on the outer surface of the pipe bender is needed in order to dent the inner wall of the square pipe. Thus, the pipe was not deformed, and even gave it additional bending rigidity.

This pipe bender was inconvenient, due to the lack of side guides, the pipe could be bent skewed. However, even with such a device, it was already possible to do quite complex things, for example, a lever fork:

But, everyone wants to have an accurate and easy-to-use tool in their arsenal, so I began to study the designs of hydraulic pipe benders. I liked this principle of work:

After an estimate of an approximate design, a drawing of a bending roller was born. The holes are made for the axles from mopeds at hand. The height of the central shoulder was obtained in practice when working with a manual pipe bender.

After purchasing a two-ton hydraulic jack, it was possible to start assembling the pipe bender frame. The sidewalls are made of 4mm thick steel strips, they were bought at the construction market. The base is bent from the same 15x15mm square pipe on an old pipe bender. The frame is fastened using argon-arc welding, but this is not important.

However, the pipe bender had to learn how to use it. In order not to jam the pipe, you need to press a little on the feed end with your hand, and so that the pipe bent by 180 degrees does not have to be knocked out of the roller with a hammer, the roller itself must always be well lubricated.

Such a pipe bender can be easily operated by one person, without assistants. The accuracy is sufficient for the manufacture of trunks, bar stools, sidecars and other structural elements. On it, we also bent the motor mount for motorbikes of the Spring-20 series.

Ivanov Dmitry