Flexible shafts from the manufacturer – Metallorukov Company

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Production of flexible shafts in Moscow. Flexible shafts from the manufacturer – Metallurukav company.

FLEXIBLE SHAFT

What are flexible shafts?

Flexible shafts are designed to transmit torque over a distance from the source to actuator. Our company manufactures the entire range of flexible shafts for deep-hole vibrators for compaction concrete mixtures, grinding machines, as well as shafts used in speed meters of railway locomotives.

Application area

Flexible shafts have high torsional rigidity and low bending rigidity. Flexible shaft used for deep vibrators, grinding machines and shafts, which are used in speed meters of railway locomotives. They transmit torque between parts that change their position during operation. Shafts for deep vibrators are distinguished by connecting dimensions, which depend on the tip diameter and length. In their design, the shafts contain a core and several layers of steel wire, the winding direction of which alternates in each layer. The manufacturer "Metalsleeve" produces not only standard sizes products - it is also possible to manufacture shafts and cores to order, based on the customer’s technical requirements. Compared to rigid hinged analogues, this product has a number of advantages. Firstly, it is easier to install and easy to replace. In addition, the flexible shaft can perfectly transmit rotation in both directions. At the ends of the products there are cartridges with which you can easily attach them. The outside of the device is covered with a protective shell that protects the shaft structure from mechanical damage and corrosion.

Range of flexible shafts

	Shaft diameter, mm	Shaft length, m	Rotation speed rpm	Bending radius, mm		Application
						IV-116, IV-117
						TEM 2 TEP 10
						VL-10, VL-80K
						Specialist. product
						grinder

It is possible to manufacture shafts and cores according to technical requirements customer.

Flexible shaft V-124B according to TU 4833-028-29124208-2008
The reversible shaft V-124B is designed to drive the speedometer of diesel locomotives TEM-2 and TPZ-10.

Flexible shaft VSBL-16 according to TU 4833-030-29124208-2008
VSBL-16 is designed to drive the speedometer of diesel locomotives VL-10 and VL-80K.

Flexible shaft
VS-350 and VS-400 according to TU 4833-027-29124208-2008
The BC-350 shaft is designed to transmit torque from an electric motor to a vibrator used for compacting concrete mixtures.
The BC-400 shaft is designed to transmit torque from an electric motor to a vibrator used for compacting concrete mixtures in confined spaces. The flexible shaft is made of steel spring wire.

Flexible shaft V-122-1 according to TU 4833-020-29124208-2002
The flexible shaft V-122-1 is designed to transmit torque from the electric motor to the grinding machine.

Flexible shaft RN-8Sa according to TU 4833-029-29124208-2008
RN-8Ca, reversible, made of stainless wire, designed for transmitting torque in special-purpose drives.

Warranty period:
V-124B - 12 months from the date of commissioning
VSBL-16 - 6 months from the date of commissioning
VS-350 and VS-400 - 1000 hours from the moment of commissioning
RN-8Sa - service life 750 hours
B-122-1 - 12 months from the date of commissioning

Company advantages

• We are a manufacturer. This guarantees direct deliveries and minimum prices.
• It is possible to manufacture flexible shafts according to customer technical requirements.
• All products have the necessary documents.
• Convenient warehouse in the Moscow region.

A flexible shaft, the main purpose of which is to transmit torque over a considerable distance, is most often used to equip engravers. Such equipment, which, in essence, is a miniature grinder, is actively used for processing parts not big size. In particular, the engraver is used as a mini-drill; it is used to perform miniature cutting, selective grinding of small elements of products and a whole list of other works.

The most common areas where flexible shaft engravers are used are the jewelry and electronics industries. Such equipment is actively used by design specialists, employees of car repair stations and workshops involved in repairs. household appliances and electronic equipment.

Electric engraver on which it is installed flexible drive, is especially relevant in situations where processing must be performed in hard-to-reach areas of the product. Using replaceable attachments, such equipment can be used in all stages of processing, from roughing to finishing.

What operations are performed using an engraver with a flexible drive?

Turn an engraver with a flexible shaft installed on it into a truly universal device Special attachments help, including:

• grinding and polishing wheels allowing to bring the surface of the processed product to a perfectly smooth state;
• brushes used for cleaning the surface of the product and polishing it in hard-to-reach places;
• cutting wheels for cutting products and processing their torn edges;
• drills, with the help of which the device turns into a miniature drill;
• cutters and cutters that allow processing of products in hard-to-reach places;
• pen-shaped attachments used for engraving work.

To ensure ease of operation with such a device equipped with a flexible drive shaft, you can purchase additional accessories– rubber lining on the handle, power button lock, etc.

Engravers on which a flexible drive shaft is installed also include a drill used in dentistry, a manicure machine, and processing equipment. natural stone and applying inscriptions and drawings to the surface of products made from it.

You can also use a flexible shaft for a drill or purchase a flexible shaft for a screwdriver. With this improvement to conventional power tools, a screwdriver attachment or drill can be successfully used to perform work even in the most difficult to reach places.

How does the engraver work and how does it work?

The engraver, which allows you to process parts with high precision and productivity, works on the principle conventional drill, and in appearance it is very similar to a large automatic pen. Main structural elements such a device are:

1. engine;
2. a flexible drive shaft that transmits torque from the engine to the working attachment;
3. gearbox;
4. a fan used to cool the spindle;
5. the spindle itself with a protruding working part;
6. device body with special openings for the exit of heated air;
7. a nut designed to fix the used nozzles;
8. device power regulator;
9. lock button;
10. power switch;
11. hook for hanging the switched off device.

Rotation from the engine is transmitted to the axis of the flexible shaft, back side which is connected to the working nozzle. Seating nozzles are unified, so there are no problems with choosing the required tool and replacing it.

Equipment selection criteria

When choosing an engraver, you should focus on a number of characteristics.

Power

Based on the power level of the device, on which its performance directly depends, one can indirectly judge the operating life of the drive motor. The power of the engraver, which for serial models can be in the range of 35–300 W, should be selected based on the tasks for which it is planned to use such equipment. In addition, you need to consider how long it will work between turning on and off. The duration of the operating process depends on the hardness of the material from which the product being processed is made. The longer the engraver is used at one time, the more power he must possess.

Number of revolutions

The speed at which the motor shaft and the flexible drive shaft attached to it rotate is also selected depending on the hardness of the materials to be processed by the engraver. Models offered on modern market, can provide tool rotation speeds in the range of 10–35 thousand rpm. Low-speed models can be purchased if they will be used primarily for finishing grinding and polishing. When performing such operations, a small load is placed on the tool, so the engraver itself does not overheat, and therefore does not fail.

If you need a more universal device with a flexible shaft, it is better to give preference to engravers that provide the ability to adjust the rotation speed of the tool.

Dimensions and weight

The weight and dimensions of the engraver influence how convenient and easy it will be to manipulate such a device during processing with its help. Engravers that have significant dimensions and weight are much more difficult to work with, but such devices, as a rule, have higher power and productivity. The weight of an engraver with a flexible drive shaft can be in the range of 0.5–8.5 kg. When choosing such a device, first of all take into account the required power and functionality, and only then pay attention to the weight and dimensions.

Ergonomics

Since an engraver works by constantly holding such a device in his hands, its ergonomics, which characterizes the ease of working with the equipment, is an important factor when choosing. When assessing the ergonomics of a device, you should pay attention not only to its design, but also to the build quality, manufacturing materials, button placement and comfortable handle design.

Noise, vibration and heat levels

These parameters are not indicated in the equipment passport. It is advisable to pay attention to them if the engraver will be used quite often. To evaluate how much noise and vibration the device makes during operation, you just need to turn it on and evaluate these parameters. As a rule, medium-power engravers make more noise, and in more high-speed equipment this problem is provided for by the manufacturers and is eliminated by including special elements in the design. You can only estimate how hot an engraver equipped with a flexible drive shaft gets during operation.

Flexible shaft design

A flexible shaft for an engraver or any other equipment whose torsional rigidity has higher requirements than bending rigidity, as mentioned above, is used to transmit torque to elements that change their spatial position during operation.

The main part of the flexible shaft, which is responsible for the main function of such a device, can be a wire rod or a special cable. This element is made of materials with high torsional rigidity. onto the main core of the wire flexible shaft to give it more high rigidity additional layers of twisted wire are wound. To ensure safe use of the flexible drive shaft, as well as to protect its surface from damage and retain lubricant on it, this device is placed in a flexible protective shell, which is stationary in relation to the rotating core.

Depending on the design flexible shafts can be of right or left rotation, which should be taken into account when selecting and using them. Not only the design of flexible shafts can be different, but also their length, sometimes reaching five meters.

The design of the fastener for such a device also depends on where the flexible shaft is installed - on a drill, engraver or screwdriver. Thus, fastening nuts or other types of fastening fittings can be placed at the ends of the shaft.

Using flexible shafts different designs various mechanisms and equipment are activated. In addition to engravers, drills and screwdrivers, internal vibrators, brush cutters and many other types of technical devices are equipped with such shafts. The simplest and most familiar option for using a flexible shaft is cleaning sewer pipes from internal blockages.

Mechanical car speedometers are also driven by a flexible shaft.
Making a flexible shaft with your own hands is, of course, possible, but given the loads under which such a device operates, it is better not to experiment and purchase serial products from trusted manufacturers. You can only be puzzled by the issue of making a flexible shaft yourself if it will be used to drive low-power equipment operating at low speeds.

Rules for working with an engraver equipped with a flexible shaft

There are a number of rules that should be followed when using a flexible shaft engraver to process various materials.

What to do before you start

Before starting work, select nozzles. All of them should be at hand, so as not to waste time searching for them later. While the device is turned off, it is better to hang it on a special hook, which comes complete with most modern models.

You can prevent the chips generated during processing from sticking to the surface of the tool if you first coat it with a layer of paraffin. It should be kept in mind: if the design of the tool does not provide forced ventilation, you can work with it for no more than 15–25 minutes, and then you need to give it time to cool naturally. By doing this, you will protect your engraver from premature failure.

When holding the engraver with your hands, you should try not to cover the ventilation slots with your palms

Changing mode

It is necessary to change the speed at which the tool of an engraver equipped with a flexible shaft rotates both when changing the operations being performed and when switching to processing another material. At low speeds they process more than soft materials, such as plastic. If such materials are processed at high speeds, this can lead to intense heating of the tool and melting of the edges of the workpiece. At medium speeds they process metal products, at high speeds – from hard natural stone.

How to properly care for your engraver

Like any other technical device, the engraver equipped with a flexible drive shaft requires proper maintenance. If performed correctly and regularly, such maintenance will not only allow the device to be used for its maximum power, but will also significantly extend the life of its trouble-free operation.

During the processing performed with the help of an engraver, its fan blades are actively clogged with dust and small particles of waste material. For this type of fan to work effectively, it must be cleaned regularly using soft cloth, soaked in soapy water. Under no circumstances should you use various solvents or aggressive chemicals for these purposes. detergents which can cause premature damage to the fan blades.

The technical condition of the attachments used with the engraver must also be checked regularly. Worn attachments should be immediately replaced with new ones, as they can cause increased vibration of the device, which will ultimately lead to its premature failure.

It is very important to pay constant attention to the technical condition of the flexible drive shaft of the engraver. On containment shaft, which is made from polymer materials, there should be no serious mechanical damage that could lead to premature shaft failure. After each use of the engraver, it is advisable to clean its flexible drive shaft from dust and other contaminants, wipe and, if necessary, lubricate the tips with which it is connected to the electric motor and the working attachment.

During operation, care must be taken to ensure that the flexible shaft does not bend too much. Both during storage and during operation, it is necessary to protect the flexible shaft from mechanical damage.

Modern models of engravers and the flexible shafts with which they are driven are quite reliable devices. With regular maintenance, they can serve for quite a long time without deteriorating their technical characteristics.

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A very popular drill tool is capable of more than what is indicated in its operating instructions. The main task of this tool is to drill holes in various existing materials. The improvement of this tool has led to the fact that today a flexible shaft is produced for the drill. This is a special attachment, thanks to which torque is transmitted to a tool that is not coaxial for the electric motor.

The flexible drive consists of components such as an armored cable and a soft body. One side of such a device is equipped with a tip for fixing in the tool chuck, and the second has a similar (or collet) chuck for installing the corresponding work products: drills, cutters and others. Such equipment is used in such exceptional cases when it is impossible or inconvenient to work with a stationary drill.

On an ongoing basis, a flexible shaft is used in medicine, in particular in dentistry, since almost all drills function through such a device. In construction, such a device is used extremely rarely, but if there is a need to drill a hole or sand the surface in hard to reach place, then only a flexible shaft on the drill will help solve the problem.

The flexible shaft can be used not only to connect to a drill, but also to a screwdriver or mini-drill. Thanks to this shaft working attachment removed from the body of the main instrument, which allows for different kinds fine work, which requires little effort. Using such equipment, you can drill holes from 1 mm, as well as strip, grind, screw in and out screws and other fasteners.

It is important to know! The advantage of using a flexible shaft is that it reduces the load on the hand, since when performing work, the impact of vibration from the tool and its weight is almost completely eliminated.

Design Features

The flexible shaft for the drill can bend in any direction, which is its main advantage. This shaft capability was achieved through the use of the following parts:

• Steel cable acting as a rotating core.
• A wire in the form of a spiral located outside the device.

The outside of the shaft is covered with a special shell, which prevents lubricant leakage. This lubricant helps reduce friction and also protects the core from mechanical stress (abrasion), damage and moisture.

The design of the flexible shaft involves the use of bearings to which the cable is attached. It is thanks to the bearings that the rotation of the cable is ensured, which is attached to the shank on one side and to the chuck on the other. A high-quality drill attachment costs about 2,000 rubles. There are cheaper models, but it all depends on the manufacturer and the quality of the product.

How to make it yourself

To equip an electric drill with a flexible shaft design, you do not have to purchase it, especially if you do not plan to use the device for long-term work. You can make the device yourself from available materials, saving not only money, but also time spent searching.

To make a flexible shaft for a drill or screwdriver, you should use any braided wire in your arsenal. If you don't have one, you can purchase it. At the same time, the length of such wire can be chosen absolutely any, depending on the technological tasks.

It is important to know! It is impossible to wind a spiral layer (armor) manually onto a regular wire, so you should use a ready-made structure.

As an alternative, you can use a speedometer cable from a car or a throttle or clutch cable from a motorcycle to make a flexible shaft. Once you have the finished braided wire in stock, you will need to connect one end of it to the shank. As such, you can use the shank from a damaged drill. For connection steel cable with a shank you will need a steel nut and welding machine. The second end of the steel cable must be connected to any existing drill chuck. It is important to understand that when performing work using such a device, you should hold your hand not on the cartridge, but on the braid or outer layer of the wire.

A homemade shaft design will not only save money, but also get a product of the required length. Standard products produced by production have a length of no more than 50 cm. Sometimes this is not enough, so you have to resort to self-production drill equipment.

In conclusion, it is worth noting that the drill, due to its improvement, is becoming an increasingly universal type of tool. The flexible shaft is a very convenient and effective attachment for a drill, with which you can solve any difficult tasks.

Flexible shafts are used in a variety of industries, wherever it is necessary to transmit torque at arbitrary angles. It is used as a transmission in drills and engravers, drills, as well as for transmitting rotation in measuring instruments, such as a car speedometer.

Why do you need a flexible shaft and where is it used?

The flexible drive for the drill consists of two main parts: a flexible cable with armored braiding and a soft shell. On one side it is equipped with a connection unit to the engine or manual drive, on the other hand, it has a chuck for attaching a tool.

Using a flexible shaft is very convenient when you need to tighten or unscrew fasteners in narrow places with difficult access, where you cannot insert a screwdriver in the working position

Flexible shafts are also used for drive hand tools for thin and precision work. Placing a heavy, high-speed electric motor in the tool itself would lead to rapid operator fatigue and loss of precision in operations. An example is a dentist's or engraver's drill.

As a result, the user gets the opportunity to work for a long time with a comfortable, light and small-sized device, and the level of vibration from the electric motor transmitted to the hand is reduced.

A feature of the use of a flexible shaft is the limitation of the maximum torque that it is capable of transmitting. If this limit is exceeded, the cable becomes twisted and the shaft fails.

Design Features

Home design feature and at the same time, the main advantage in application is the ability to bend it anywhere in any direction. This is achieved by using the following components:

• flexible and durable steel braided cable that transmits torque;
• armor braid or spiral-wound spring wire that acts as a flexible drive housing.

The outside of the wire is covered with a corrugated plastic sheath, inside of which there is a grease. It reduces friction, prevents abrasion of the core cable and protects it from moisture and dust.

The design of the flexible drill drive also includes bearings to which the cable is attached. They keep it spinning. At one end the cable is fixed in a socket, at the other it is provided with a mount for a tool.

Such a drive is intended for light and delicate work; you should not count on using it to unscrew a soured bolt or screw in a 130 mm self-tapping screw at full speed; you must remember that the torque transmitted by the flexible shaft is limited.

How to make it yourself

Those who like to make tools with their own hands can easily make a flexible drive for a drill on their own.

Important! You won’t be able to make armor braiding yourself; this requires industrial equipment. It is also important to understand that a homemade flexible shaft for a drill will be inferior to a factory one, first of all, in terms of working life. And it’s better to use it occasionally - then it won’t let you down at a crucial moment. For professional work in large quantities it is better to spend money on a purchased extension cord.

You will have to buy a braided cable in a store and ask them to cut it to the length you need. All that remains for Samodelkin is to cut the ends, mount the outer protection, filling it lubricants. The shank from a broken drill of a suitable diameter will work as a blank for the mounting unit in the chuck.

As an option, you can take a cable from a car speedometer, as well as a motorcycle gas or clutch control drive as a starting material.

One end of the armored braided wire will need to be welded to the shank of the broken drill using a nut of the appropriate diameter and a welding machine. A drill chuck or a hex adapter is welded to the second end of the cable for quick tool change. Remember that when operating such a drive, you need to hold it not by the rotating cartridge, but by the stationary braid. Such a do-it-yourself device will not only allow you to save money, but also make the drive exactly the length you require. Most factory drives are 25cm or 50cm long.

Flexible shaft for engraver

The engraver, or drill, develops high speeds - up to 30 thousand rpm. The device is small-sized and fits comfortably in the hand and is used for operations:

• polishing;
• milling;
• drilling holes of small diameter;
• grinding, etc.

Working as an engraver requires high precision of the master's movements. The effort involved is small, compared to, say, tightening self-tapping screws. The torque is also low. Such devices are used by jewelers and artists who create works that are not inferior to the best examples wood and stone carvers, as well as embossers. Engraving is performed on materials such as:

• metal;
• tree;
• stone;
• glass;
• plastics.

The flexible shaft for the engraver allows the user's manual efforts to be reduced to a minimum, turning many hours of work into an exciting activity.

Shafts for lawn mowers

Mechanical scythes with electric and gasoline drives use both flexible and rigid shafts.

Powerful brush cutters, capable of cutting tall, hard and dense grass and even small bushes, use all-metal rigid drives. Such devices are designed for long-term operation and have high torque. They are also large in size and weight and are worn on shoulder straps. The working tool is thick, rigid fishing line or powerful steel knives - two, three or four - bladed.

The flexible drive is used in lightweight, low-power and small-sized trimmers designed for mowing corners after a lawn mower or trimming grass on small lawns. These trimmers are held with one hand, and the flexible shaft is used to mow in the most comfortable position. Cutting element such devices - a fishing line of small or medium thickness or a lightweight two-bladed knife. If the device is overloaded, the flexible shaft may become twisted. In this case, the rupture usually occurs near the shaft-to-engine attachment point. If you cannot buy a “original shaft”, then you need to select a suitable length from drives in the direction of the braid. Such drives can only rotate in one direction.

Before starting seasonal work and after changing the drive, remove any remaining old lubricant, rinse with gasoline or other solvent, and fill the cavity in the handle with new lubricant. The type of lubricant is specified in the user manual.

Speedometer flexible shaft

The flexible shaft transmits torque from the car or motorcycle transmission to the magnetic speedometer sensor. If the speedometer needle, when driving at a constant speed, begins to twitch or goes to the extreme position, it means the cable is faulty. You can replace it yourself. The flexible shaft is selected according to the parts catalog for your car brand. It must match in terms of attachment points and length. If the cable is too long or too short, there is a risk of bending it at too small a radius. This leads to extraneous noise (similar to howling), increased wear and premature failure of the unit.

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