For quality switching electrical wiring and cable routes with input distribution, grounding and other devices, it is important to use cable lugs. They crimp the ends of the wires. This is done not with bare hands, but with the help of a special tool.
Crimpers, or pliers for crimping wire lugs, guarantee high-quality contact and a reliable connection. They can be used for crimping tips various types- insulated and non-insulated, sleeve and sleeve. Also, the device allows you to compress automotive terminals.
Features of crimping pliers
Press tongs vary in size and shape of the matrix, but have a common purpose. A tool is used to fasten several conductors to each other or to prepare a bundle of current-carrying conductors for subsequent switching with terminals on electrical appliances.
Often the need for crimping arises when switching cables consisting of several cores. They cannot be placed in the terminals without proper preparation, because due to small vibrations during movement electric current some veins will be compacted. This will lead to the appearance of free space and, accordingly, a weakening of the contact.
This is what contributed to the fact that several decades ago, when there were no cable lugs, only single-core wires were used for the installation of power electrical wiring. With the advent of press tongs, everything has changed significantly.
Despite the recommendation to use a single-core cable in power wiring, stranded wires were operated and crimped. Instead of pincers then (and now), the operation was carried out with the help of a powerful press that creates the required force. The principle of operation of the press resembles a car jack, and most models of equipment are equipped with a hydraulic drive. Today, bulky devices are used for high-quality crimping of a thick power cable.
The crimping process is trivially simple: a special sleeve is put on the end of the stripped cable, which is placed in the crimping pliers with subsequent fixation. Remember the network cable that is inserted into the rear socket of the system unit: it is crimped with press tongs, and the transparent RJ45 lug acts as a sleeve. It's not the only one possible variant: there are double-sided bushings, on both sides of which the ends of different cables are inserted. As a result, we have a better and more reliable alternative to conventional twisting or soldering wires.
The main types and varieties of ticks
Structurally, crimping pliers can be divided into two main varieties - diaphragm and those that work on the principle of pliers.
The second option is considered more common: when you press the handles, the tool squeezes the sleeve with two working planes, but, unlike pliers, there are cutouts of the desired shape on the edges that act as guides. This tool is suitable for crimping U-shaped ferrules.
The main advantage of the tool is its versatility, since it is possible to crimp the tips from any side. The versatility ends when it comes to sleeve sizes: specific pressing tongs are designed for a small range of sleeves.
If you frequently crimp or are currently working on a large wiring project, more it is likely that you will have to crimp the wires with cable lugs of both large and small sizes. Thus, on hand you need to keep several crimpers for different bushings.
There is a great alternative: crimpers with a set of removable dies mounted on a cassette. To change, the working part of the tool is inserted into the hole of the cassette, then it is pulled “toward itself”, and the matrix is inside. It remains to insert the base into the hole with the matrix of the desired shape. Remember high-quality razors with removable blades - a similar principle works.
With regard to diaphragm pressing tongs, they allow crimping from four or six sides. Exact amount depends on the diaphragm mechanism. The full circumference of the sleeve improves the quality of the connection, provides maximum crimp tightness. In addition, this device is automatic mode adapts to the thickness of the sleeve used, so there is no need to change dies.
But even such a tool has a drawback - you can crimp the end of one wire, since on the other side there is a closed "working head". Diaphragm pliers cannot crimp two wires instead of twisting them.
Application area
And now let's look at the main areas of use of press tongs for terminating wires. Depending on the specific situation choose a tool of the desired shape and design.
For stranded wires and thin-walled ferrules
These crimpers are used for crimping wires of small cross section (starting from 0.5 mm) with pin sleeve cable lugs. Quality equipment is produced by IEK. Swage electric cable is carried out to the maximum effort so that the spring mechanism works.
The need for crimping a multi-core cable arises when it is connected to the terminals on circuit breakers, switchboards, boxes and other devices. The presence of high-quality bushings and tools eliminates the fraying of the cable cores, since reliable crimping occurs, which ensures continuous electrical connection during switching.
Without cable lugs and subsequent crimping, it remains to either twist or solder the wires to the terminals of distribution and switchboard devices. In that case, be prepared to frequent breakdowns veins, disruption of communication with subsequent short circuits and equipment overheating. By the way, this option is still acceptable, but for a cable with one core.
For stranded wires and thick-walled ferrules
For high-quality crimping of power multicore cables with thick tips, press tongs of other sizes are used. Each individual tool is characterized by a unique working area. For example, for press tongs PK-16 from KVT there are five of them. Zones are marked with special marks on the jaws of the crimper. For example, the crimping range can be 1.5-16mm. After crimping, a special stamp remains on the back of the bushing.
Important! Many tools, including the PC-16, use stranded cable exclusively to crimp. If you try to do this with a single-core wire, then due to excessive force, the core may be refracted.
Pressing starts with preparatory phase. First you need to strip the ends of the cable, then insert it all the way into the sleeve, excluding the free space inside. That is why the sleeves must be selected according to the diameter of the cable so that it freely enters inside, but does not hang out there like a failed cork in a glass bottle. This is very important, since this criterion depends on the quality of the future crimping.
All protruding wires need to bite off. After that, insulation is performed: for this, heat shrink tubes with a hairdryer are used. To increase reliability, the upper part is wrapped with electrical tape. But this is completely optional: the tube will be enough.
Please note that tools can be marked with the letter "U" and without it. For example, in the case of the PK-16-U, the ratchet mechanism is located inside the handle. There will also be different efforts applied during crimping using PK-16 and PK-16-U. In the second case, less force is required.
For large cable
In the case of large power wire, a large hydraulic press should be used instead of pressing tongs. Such a crimp appeared much earlier than crimpers, but, as in the case with them, what kind of high-voltage cable can be crimped depends on its dimensions. In the domestic sphere, the tool is not used, since crimped bushings, lugs and sleeves have considerable dimensions. This option, for example, is suitable for laying and switching power wires in electrical panels at the entrances of houses, etc.
To compress the matrix, you need to apply a lot of effort to the lever. If the valve is slightly ajar, then the stem begins to slowly move away. The fully open valve ensures that the stem is quickly removed all the way to the stop. During full matrix compression, blocking occurs. At the same time, there is no possibility of overpressure that could damage the mechanism.
Since matrices are selected depending on overall dimensions, then the hydraulic press is released together with a cassette of several matrices. Top part magnetized, so it automatically returns to its original position. Only the lower element of the press changes. Regardless of the position of the equipment, parts do not fly out. The tool has a rubberized handle that increases electrical safety.
Crimping two wires with a double-sided sleeve is necessary in cases where the electrical panel is dismantled with subsequent transfer to another location. There is a need to increase copper wires section 6-12 sq. mm.
For serial crimping of wires
This option is excellent in that it excludes air from entering the sleeve. This is very important if you want to connect copper and aluminum wires in series, which can oxidize when exposed to oxygen.
For crimping computer cables
Crimping pliers for twisted pair used as a computer LAN cable are separate category. They work similarly to pliers with two jaws: instead of a metal sleeve, they use a special-shaped matrix that allows you to install an RJ 45 plug on a computer or telephone wire. Instead of crimping, such a tool displaces the contacts, cutting through the insulation on individual wires and pressing tightly to the cores.
How to work with crimping pliers
The process of crimping a cable with a sleeve or a ferrule is intuitively simple. The wire is placed inside one of the listed elements, to which a matrix of tongs is brought, the handles are squeezed and a high-quality contact is formed. In practice, everything is much more complicated than it seems. If this is your first time crimping wires, then surely the connections will be far from ideal. It is not uncommon for a seemingly well-made contact to deteriorate over time.
If the shape of the terminals is not maintained
The reason for this may be incorrect settings when squeezing the two jaws of the matrix. The forces applied and the shape are selected depending on the crimped wire and lugs. That is why, as mentioned above, two or more tools should be at hand so as not to have to constantly change the spring settings for different cables and sleeves.
The quality of the work performed depends on the material used for the production of the sleeve, and the thickness of the bushings and tips. Tight terminals are much easier to crimp: they are able to withstand the shape better than when using products made of soft material.
Also pay attention to important requirement, according to which you need to correctly place the tips of the U-shaped section. A certain skew of the part may go beyond the error zone.
Twisting stranded conductors before crimping
Experienced electricians who often solder and twist wires may be in the habit of doing this even before the crimping process. This action is strictly prohibited when crimping multi-wire lugs. It is very easy to check the validity of this condition: cross two stranded wires with each other, then squeeze them with pliers. You will notice how the wire is deformed, it will be interrupted, so the electrical connection on the current-carrying core will decrease.
Without twisting, the wire will be parallel, and in case of deformation, the wires will fill the voids, and there will be no squeezing.
Summing up, I want to remember a simple rule: for each job you need your own tool. This is a generalized concept, but in the case of press tongs, everything is much more complicated. If there is no desire to constantly reconfigure the spring, which is very difficult to do, then a separate device is selected depending on the type of wire being crimped. The final choice of which tool to buy and how many varieties to use, make depending on the quantity daily work associated with compression.
Crimping tools for lugs are devices that simplify the mechanical compression of connectors, wire contacts. With the help of presses, crimpers, crimping pliers, an electrical connection is established in the network, troubleshooting. We offer devices for the following types of crimping:
hexagonal;
wedge-shaped;
trapezoidal.
Design and advantages of press machines
Crimping tools are made of hardened steel. They have a small weight, compact size, simple principle of operation. The devices consist of a ratchet mechanism, matrices, devices for unlocking and adjusting the crimp level, ergonomic handles. They are widely used in manufacturing repair centers, at home thanks to the functional features:
provide uniform crimping of cable cores and end sleeves;
create the maximum possible area of the contact association;
suitable for clamping insulated tips various sections, telecommunication connectors.
They differ in crimping methods: oval, square or four matrices. There are also universal devices with interchangeable nozzles.
Sale of crimping tools online at AVS-electro
You can buy crimping tools in our online store. The catalog contains models of mechanisms with removable matrices and fixed nozzles. Products manufactured by ABB, DKC, IEK, Legrand, Schneider Electric and other brands comply with international standards, safe to operate.
For quality connections various wires and cables with sources and consumers of electricity, metal crimp terminals and sleeves. Their fastening at the ends of wire products is carried out using a press tongs for crimping the tips.
Features of crimping pliers
The principle of operation of the tool is similar to the work of pliers. Crimping pliers for ferrules are distinguished by the complex profile of the pressing jaws. Crimping pliers or crimpers have various sizes and the shape of the landing bed. Each type of tool is designed for crimping wires and cables with a certain cross section and number of cores.
Tools for crimping wire lugs and cable cores allow you to quickly and efficiently carry out switching connections between power units. The crimping process for cable lugs is quite simple. A sleeve is put on the bare end of the wire or stranded twist. She is led into the opening of ticks. With the force of the fingers, the levers of the tool are squeezed, and the crimper compresses the sleeve with the wire.
Main types of mites
Crimping pliers are divided into two types. The most common type is a design that works like pliers. That is, the sleeve is compressed on both sides. Other pliers are diaphragm crimpers.
pliant
The tip is crimped in the same way as pliers capture any part. Working surface matrices has cutouts into which the tip shank is threaded. This design is suitable for those fasteners that do not need special reliability.
To increase the compression force, hydraulic crimping tools for tips. Thanks to this improvement, the pliers began to have greater application efficiency. The design uses cylinders with pistons filled with oil, which creates a large pressure of the dies on the tip sleeve.
Important! Some crimpers are equipped with several types of removable dies. The versatility of the tool eliminates the need for pliers for each size of conductor section.
The originality of the design of diaphragm crimps lies in the comprehensive coverage of the tip shank. The principle of operation is similar to the movement of the aperture blades of photographic lenses. The only drawback of such devices is the impossibility of inserting ticks into the connection of the two ends of the wires.
Note! A diaphragm tool is used as a press for metal tips of a pin or flat shape. The all-round clamp is much more effective than the pliers type of coverage of the wire products.
Application area
Crimping pliers for wire lugs of certain designs are used depending on the cross-sectional composition of cable products. The main areas of use of crimpers can be represented by the following list:
- stranded wires and thin-walled lugs;
- stranded wires and thick-walled lugs;
- tips and electric cable large section;
- sequential crimping of wires;
- crimping computer cables.
Stranded wires and thin-walled lugs
Thin-walled lugs are used for wires of small cross section - from 0.5 to 3.5 mm2. Elements are marked NShVI. The abbreviation stands for:
- H - tip;
- Ш - pin;
- B - sleeve;
- And isolated.
NShVI lugs are used for crimping copper stranded wires with subsequent insertion into sockets of various electronic devices. The handles of the crimpers are compressed until the spring mechanism of the device is activated.
Note! Multi-stage matrices of clamps allow you to work simultaneously with wires with a cross section in the range indicated above. This eliminates the need for in large numbers crimping hand tools.
Press tongs create a strong and reliable crimping of the tips. Without them, one would have to twist stranded cores or solder switchgear terminals. The use of pressed limit switches completely eliminates the problems associated with the breaking of thin veins, wire breaks, and the risk of a short circuit.
Stranded wires and thick-walled lugs
Thick wall shanks are used for crimping stranded power cables. Their limiting section reaches 16 mm2. Press tongs PK-16 are used only for stranded wires. The tool can compress the sleeve so hard that it will easily break a single core.
The cable crimping process takes place in several stages:
- At the end of the wire, mark the length of the sleeve.
- Special wire cutters remove the insulation from the marked area.
- Put on a piece of heat shrink tubing so that it does not go over the bare wire.
- The cleaned end of the cable is inserted into the sleeve. The entry of the wire should be tight, but without effort.
- Pincers crimp the tip.
- Protruding veins bite.
- The heat shrink tube is heated with a hair dryer until it tightly wraps around the cable.
If the letter “U” is indicated in the marking of the tool, then this means the location of the ratchet mechanism inside the handles, which creates a large force on the jaws of the crimper. Pliers PK-16-U are more easily compressed during cable crimping.
Lugs and heavy gauge electrical cable
Crimping for large cross-section electrical cable lugs is done with a manual hydraulic press. Initially, the valve of the device is ajar, and the stem slowly moves to its original position. At the beginning of the piston stroke, the valve opens completely, which ensures that the dies are compressed with great force.
In house equipment large cables are rare. Basically, hydraulic pliers are used to install lugs on high-voltage cables for fixing them in shields. industrial facilities. Crimping hydraulic pliers for overall ferrules are also used when laying and switching power cables in energy shields of entrances residential buildings, administrative buildings and civil buildings.
The hydraulic press is equipped with cassettes with interchangeable dies. The upper lever is equipped with a magnet, which, after compression, returns the handle to its original position. The levers are equipped with rubberized shells, which ensure the electrical safety of the device. The crimping of two cables with a double-sided sleeve is carried out when transferring the electrical panel. These pliers for simultaneous crimping of two wires are also used when building copper conductors with a diameter of 6-12 mm2.
Consistent crimping of wires
This method is used when connecting pieces of wire into a single whole. This is especially important for sequential compression conductors with cores different metals. For example, when you need to make a bow of aluminum and copper wire, use a crimp sleeve.
The fact is that twisting from dissimilar metals will cause destructive processes from their direct contact with each other. The connecting sleeve becomes a kind of bridge between aluminum and copper.
Bare wires are inserted from both sides into the sleeve. After that, the sleeve is squeezed with tongs. The compressed sleeve does not allow air to enter the connection, which prevents the occurrence of oxidative processes in the metal of the wires.
Crimping computer cables
Often the question arises of crimping an Internet cable to connect it to a computer or to combine several PCs with a local network. For this, a twisted pair cable is used. The wires are untwisted and distributed parallel to each other. At the same time, the strict color arrangement of the wires is observed.
RJ-45 plastic connectors are used as tips. Polymer tips are intended for insertion into the nests of hubs and network adapters. A twisted pair consists of eight wires. Interlaced in pairs, insulated cores minimize interference when electric currents pass through them.
Special crimpers are used to crimp the ends of cables. The RJ-45 connector is a plastic box with a hole for the cable on one side and contact terminals on the other side.
The process of installing connectors on network cables is as follows:
- remove one centimeter of insulation, for this there is a special connector on the pliers;
- twisted pairs are untwisted, aligned in a certain order;
- wire cutters evenly cut the wires so that the bare ends of the wires are formed;
- the wires are inserted into the RJ-45 connector, the cut wires with their cores should be tightly adjacent to the back side of the terminals;
- the plastic connector is inserted into the opening of the pliers, then the tool handles are squeezed.
The twisted-pair wires must be arranged from left to right in the following order (viewed from above from the input side of the connector):
- White-orange.
- Orange.
- Green-white.
- Blue.
- Blue white.
- Green.
- White-brown.
- Brown.
How to work with crimping pliers
Self-mastery of crimping tongs may initially be accompanied by the creation of a poor-quality connection of the sleeve or tip with the wire. It often happens that a seemingly reliable crimp hides a bad contact. This can happen for two reasons.
If the shape of the terminals is not maintained
Mismatch between the size of the tip or sleeve with the opening between the jaws of the dies can cause a distortion of the squeezed element. Before proceeding with crimping, you should try on the tip to the opening in the tongs. It is also important that the bare end of the wire fits tightly into the holes of the shank or sleeve.
A bundle of wires or a single core should enter the connecting element with a slight stretch. If there are any doubts about the reliability of fastening, it is worth practicing on separate sections of the cable. After crimping by hand, you need to check the strength of the connection. At the slightest backlash, the crimp should be rejected and crimping should be resumed with another limit switch.
Excessive clamping can damage the strands inside the sleeve. The accompanying documentation of crimping pliers usually indicate the cross-sectional dimensions of the lugs directly for each opening of the pliers. Soft metal alloy connectors should be avoided. Over time, the tip may lose strength, and the contact will become unreliable.
Twisting stranded wires before crimping
The error can be made by the habit of twisting the strands, which is done before insulating or soldering hand connections. It is absolutely impossible to do so.
You can check the perniciousness of twisting in a simple way. It is worth squeezing the twisted stranded cables with pliers to make sure that the wires are deformed and damaged.
If, when removing the insulation from the installation section of the cable, twisted conductors are found, then they must be straightened. Only after that, the cores are inserted into the opening of the tip or sleeve.
Tip color coding
Color marking is used for NShVI tips. The color of the connector skirt corresponds to a certain wire section:
- black - 1.5 mm2;
- blue - 2.5 mm2;
- gray - 4 mm2;
- yellow - 6 mm2;
- red - 10 mm2.
Table color coding tips NShVI
Crimping wires with pliers in terms of quality and speed of connections cannot be compared with manual twisting or soldering. For any connection, you can always choose the right crimper model.
Video
Crimp kit arrived. Crimps auto-terminals on wires from 0.5 mm² to 6 squares and all that are crimped according to the same principle; insulated terminals three colors-sizes and limit switches NShVI (NShVI2).
Who cares what happens if you mix point 18, several dozen correctly and incorrectly crimped terminals and a lot of time, read on.
Package
The pliers come in a regular gray bag without bubbles. They are not needed, the contents of the parcel can be destroyed only purposefully, it is simply difficult to damage it using the methods of our mail.There is no factory packaging, such as a blister or a box, the postal package has long been lost and there is no point in photographing it. Will go for a gift. And in general, I do not like unboxing reviews.
Appearance
Rectangular bag made of thick fabric, the shape is apparently given by two pieces of cardboard inside. Dimensions 28 * 14 * 4 cm. A little less than a sheet of A4 paper. Has a carry tail. Zipper on the outside on three sides of the bag.
Let's see what's inside.
Interior
Inside are the press tongs themselves, a screwdriver, interchangeable dies and spare screws.The first smaller (0.5-1.5mm²) die for crimping the auto-clamps is already installed in the pressing tongs.
The screwdriver is stored under the rubber bands on the side wall of the bag.
The screwdriver is double-sided, on one side there is a cross size PH1 for adjusting the ratchet actuation force. On the other side is a 3mm hexagon for changing dies. The screwdriver is not magnetic, the rod is fixed in the handle with a spring-loaded ball. 
Three more matrices are in the pockets of the bag. There are also 4 spare screws for changing dies.
Hex socket head screws, regular M4 thread, no problem to replace. 
The pockets close with Velcro. Life hack - you can put all the matrices and screws in one pocket - they fit perfectly - and take the other three with bags with different types of terminals. Or matrix + terminals for this matrix in this pocket. I will probably do so.
The bag is universal, it has two more free places. One place is for the stripping pliers, the second is for the MC4 solar panel connector keys.
For example, such a lot
Ticks
The pliers are made of metal plates about 2 mm thick.
Plastic handles with rubber inserts. The handles do not stagger, it was not possible to remove them with the usual effort - the handles are latched into the latches. They won't slip, they won't need to be glued. metal base goes to the end of the plastic handle - the magnet sticks to the end of the handles.
The rubber inserts are marked ++++, I thought that the second handle would have a ---- sign, but both have ++ marked.
Pincers are assembled on rivets and pins. Inside you can see two springs, one small for the ratchet triggering mechanism, the second, large, the main one is covered with a lid.
The pliers have a gear wheel fixed with a screw. By turning this gear wheel, you can adjust the final position of compression of the dies. That is, you can make the ratchet open when the matrices do not fully converge.
The screw on the ratchet can be unscrewed with the cross end of the supplied screwdriver.
There is also a lever near the ratchet, by pulling which you can interrupt the crimping process and open the jaws of the dies.
matrices
The width of all matrices for these pliers at the point of attachment with screws is 4 mm.
First Matrix JX 1601-08
crimps auto-terminals from 0.5 mm² to 1.5 mm². The width of the first die at the crimp point is 7 mm.
There is a step inside the matrix, so this matrix compresses the terminals in one pass - both insulation and conductors at once.
We take the most common auto-terminal, insert it into the matrix and fix it with one click of the ratchet.
The stripped wire is inserted into the terminal and crimped with one push before the ratchet engages.
The wire must be stripped so that the cores are crimped in that part of the terminal where the cores are crimped, and the narrower and longer whiskers crimp the insulation.
Well, the process of crimping in GIF. Full video at the end.
Crimp result terminal 6.3mm wire 1.5mm², die space 1.5
I tried to crimp other terminals, the wire must be selected for a specific terminal.
On the right are well crimped terminals, on the left are terminals for which the wire is too thick.
Terminals and wire must be selected, you cannot just take a terminal designed for 1.5 mm² wire and crimp 0.75 mm² wire in it. It is necessary to either fold the wire twice or select a terminal with a smaller crimp mustache. Otherwise the wire is not held properly. Similarly, with a large wire size, when crimping a 2.5 mm² wire in a terminal for 1.5 mm², in whatever matrix it is crimped, the wire will be crimped poorly and the edges of the antennae will not wrap back into the cores and insulation, they simply will not be long enough. You can see for example such a lot -
it has six kinds of ring bare terminals under different diameters wires, including under this matrix. In the picture, a wire with a cross section of 0.3-1 mm² can be crimped into the terminal on the left, and 8-10 mm² into the terminal on the right, and the terminals are, as it were, the same size.
Terminal and wire sizes
About the same with flat auto terminals. For example lot
Identical terminals under different sizes wires.
It is difficult to find a seller with a wire size chart. Even this seller does not have a description for all terminals which wire can be crimped. We have to determine the diameter of the wire empirically. By the way, I recommend the seller, it comes from him quickly.
And an interesting reference to how the crimped terminal should look right and what errors are possible during crimping. Everything is in English, but with pictures everything is clear even without knowing the language.
Second matrix JX2546 crimps wires from 2.5 mm² to 6 mm². 
The width of the die at the crimp is 6 mm, a thinner die can put more pressure on a thicker wire. 
there is no step in it and you need to crimp it in two passes - first the cores then the insulation. 
The terminal is also inserted into the matrix, fixed with a ratchet, a wire is inserted and the wires are crimped. 
Then the clamp is inserted into larger size and the insulation is crimped. In the photo, the ring terminal with a 2.5 mm² wire is crimped in the 4mm position - core and in the 6mm position - insulation. So the place of crimping in tongs must be selected for a specific wire section and terminal. 
Similarly, the 9.6mm terminal is crimped onto a 6 mm² wire - the cores are in the 6 mm position and the insulation in the same position is not clicked. The insulation would need to be crimped in position 8 or 10 if there was one, but since the matrix presses a maximum of 6, it is necessary to crimp the insulation in position 6. 
Well, GIF crimping. 
Third matrix crimps insulated terminals in three colors. 
The color of the position in the matrix indicates the maximum wire diameter that can be crimped. Blue is the largest, red is smaller and yellow is the smallest. We take the red insulated ring terminal NKI 1.25-3 and crimp it onto a 2.5 mm² wire. 
If the wire does not completely fill the hole in the terminal, it will need to be crimped in a different color position. 
Well, the crimping process in GIF as usual 
Fourth matrix JX1601-06 crimps NSHVI tips from 0.25 to 6 squares. 
Compresses like a trapezoid. 
NShVI tips are designed to make stranded wire rigid, for example, in order to insert a stranded wire into the terminal block.
AT different countries different standards for the color designation of the wire section for the NShVI tip. For example, here is a table of colors and wire sections that are customary to use with us.
According to this table, lugs with a section of 6 mm² have a length of 12 or 18 mm, a matrix width of 12 mm - that is, the width is enough to crimp the lugs most commonly used in length. Elongated ones are rare. 
It is easy to crimp - we select the tip so that it fits snugly on the wire cores and press in the place with the corresponding designation in the matrix, we didn’t have to select anything here. Crimped several tips, the result is visible in the photo. 
Animated picture of crimping NShVI 
Video version of the review of ticks:
Pros:
- Enough universal set, which can crimp the most common stranded wire terminals.
- Carrying storage bag, there are two empty places under the elastic bands and a place without elastic bands - you can store a supply of terminals inside the bag.
- The price of the set, it is possible to buy the same set with an insulation stripper a little more expensive than this.
- Spare screws are not in vain included in the kit, while writing a review, I changed the matrix 10-15 times, tore off one screw, the thread in the tongs is intact.
The product was provided for writing a review by the store. The review is published in accordance with clause 18 of the Site Rules.
I plan to buy +60 Add to favorites Liked the review +60 +97Professional handpiece pressing pliers are presented in the form of a mechanical tool that allows you to ensure a reliable connection of two elements. Outwardly, their design most of all resembles ordinary pliers, but instead of even sponges, specific relief matrices are used. Them functionality designed for different shapes and diameters of crimped parts.
Short description
Long term operation electrical networks largely depends on how well all the connections between the conductors were made. That is why crimping products are widely used, with which you can achieve the most reliable connections non-detachable type. During this procedure, the cores of the prepared wires are carefully compressed in special sleeves made of aluminum or copper. In order for the result to be of high quality, the master must apply a large compressive force provided by crimping tongs.
Such a tool is often called a crimper, since many manufacturers equip the unit with interchangeable dies with profiles that are combined with both conductors and insulation. On sale you can find quite large sets of such devices, where each master will find everything necessary for high-quality work.
Most often, modern professionals use a mechanically driven crimping tool. Such units are equally effective in both industrial and domestic industries. Of course, if necessary, more powerful pressing tongs can be purchased, where the main work is performed by a hydraulic drive. They can be used to process cables with large diameter and cross-sectional area from 120 mm².
Universal press pliers for crimping sleeves and tips consist of two basic parts:
- The fixed element is a matrix, which is presented in the form of a curly bracket, providing the necessary deformation of the material.
- The moving part is a specific punch, without which high-quality extrusion on the sleeve cannot occur.
Matrices are selected in strict accordance with the diameter of the tip. Depending on the model used, all settings are made via fine adjustment or replacement of the part itself. Standard domestic installation of such a tool is made in the form of non-removable curly sponges, which are designed for quick crimping of different-caliber sleeves.
AT removable models ticks, it is the correct choice of the working area, which necessarily includes a matrix, as well as a punch, that is of great importance. If the master made some mistake, then the final connection will turn out to be extremely low, and normal contact will simply be unavailable. In addition, the compressive force must also be able to measure. After all, excessive pressure will tear the sleeve, which will make it unsuitable for further operation. But a weak crimp, on the contrary, will not be able to provide high-quality contact, the final contact will be extremely unreliable.
It is worth noting that in recent times craftsmen actively use manual pressing tongs of the PK-16 brand, which are manufactured by the KBT company. The thing is that such devices have the simplest design, a high degree of endurance, and they are also very convenient to use. The tool completely lacks unnecessary auxiliary functions, due to which it is included in the list of the most popular budget options.
Applications
Crimping pliers are actively used by both beginners and more experienced radio amateurs, as well as electricians and auto mechanics. Such units are simply indispensable in situations where you need to process the contacts of standard cables and professional connectors with an unusual connector (this category includes a network cable for a PC).
Light and simple design such crimpers gives each master the opportunity to complete the task as quickly and efficiently as possible. The device is guaranteed to ensure reliable and tight crimping of the workpiece, thereby achieving the highest degree of contact between the connecting element and the conductor. The price of the unit directly depends on the manufacturer, the type of design and quality.
It is worth noting that crimping pliers do an excellent job of crimping insulated wires:
- NShKI - pin round tips.
- GSI - connecting sleeves.
- NCI - ring type tips.
- RPI-P, RSHI-P, RPI-M, RSHI-M - flat and plug connectors.
- OV - piercing type couplers.
Crimping units are actively used for flexible conductors of wires in the process of connection circuit breakers, chandeliers, sockets and lamps. Professional crimping of connector sleeves in the industrial sector is carried out using universal pliers hydraulic type. Such units are designed for cable cores with a cross section of 16 to 240 square meters. mm.
Design differences
Universal pressing tongs are designed to work with sleeves and tips, the cross section of which can vary over a wide range. In the domestic and industrial sectors, the most common are parts with an indicator from 1.5 to 16 mm². The special design allows you to accurately press the metal of the tip (sleeve) into the conductive cores of the conductor. The final result depends on the required depth and application profile.
Some models are equipped with a ratchet mechanism, due to which the handle of the unit is in a compressed state until the crimp is completed. At the final stage, the pawl is triggered and the inverter mode is turned off. In such a situation, the master simply will not be able to squeeze the handle, since the tool's jaws are not fully open. In addition, the unit can be equipped with a side swivel wheel that disables the lock if necessary.
Each tool jaw is equipped with working areas with a variety of profiles. Such technical solution allows craftsmen to crimp any type of lugs and sleeves with a standard section. For more comfortable work, each zone is marked with its own number or a special stamp, which prevents errors associated with the wrong choice of size.
PK-16 products do not differ at all from their counterparts in any way. design features. But the presence of longer handles allows you to comfortably work for a long period of time without making much effort.
If the master decides to use the production area with numbers 1.5 and 6.0, then he will need a little onslaught of one hand to get the highest quality result. But for zones 10 and 16 it is necessary to use the power of two hands. It is worth noting that if a specialist most often works with large tips and sleeves, then it is better for him to buy a more powerful and larger unit.
Varieties of pressing units
Many modern manufacturers engaged in the manufacture of crimping pliers based on various standards. The buyer can always buy available tool with a narrow scope (pressing a certain type of cable) or universal models. That is why even before buying it is necessary to determine what work the unit will perform.
Rules for using the tool
Despite the fact that many novice craftsmen consider crimping quite simple view work, but even in this case there are specifications on which the quality of this procedure depends. The correct choice of the unit is of great importance, since it must have an optimal compression force, which will be quite sufficient for the sleeve used.
Between those wires that are interconnected due to crimping, the most high-quality and reliable contact is created. In order for the result to meet all the requirements, certain rules must be followed:
Larger sleeves with a section of 10 or 16 mm² can only be crimped at certain intervals. Otherwise, frequent exposure to excessive loads can deform the tool, due to which it will become unsuitable for further use.
Main advantages
Many people think that crimping pliers are not needed at all to connect lugs and wires of a small cross section, because they can be replaced with ordinary pliers. Of course, such a way out of the situation is quite accessible, but to achieve such High Quality as with ticks it will no longer work. And all because the matrices of the tongs provide a too tight fit of the tip to the core, which prevents the penetration of water and air. Due to this, metal oxidation can be excluded, which is especially important when working with copper parts.
During the use of pliers, gaps are formed where dust, moisture and any debris can easily enter. The quality of the contact will be reduced several times, and this is fraught with an increase in current resistance. The cores receive too much clamping, which violates their cross section. Over time, some of them will thin out or simply fall off, which will reduce the conductivity of the signal.
