Press tongs for nshvi 2. Nshvi tips, tml, sleeves. use and crimp. For stranded wires and thin-walled ferrules

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 crimping pliers for wire lugs, guarantee high-quality contact and 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 was no cable lugs, for the installation of power electrical wiring, only single-core wires were used. 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 system block: it is crimped with press tongs, and the transparent RJ45 tip 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 often carry out crimping or this moment working on a major electrical 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 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 a large cross-section power wire, instead of pressing tongs, use a large Hydraulic Press. 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 when dismantling electrical shield followed by transfer to another location. There is a need to build up copper wires with a cross section of 6-12 square meters. 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 cable used as a computer LAN cable are separate category. They work similarly to pliers with two jaws: instead of a metal sleeve, a matrix is ​​​​used special form, which 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, in accordance with which it is necessary to correctly place the tips of the P-about different 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.

• • Of course, for the entire instrument (with the exception of some Supplies) a guarantee is provided for a period of 1 to 5 years, specifically for hydraulic presses - 3 years.
• • At standard work It is recommended to change the oil at least once every two years. If the tool is used frequently, the oil should be changed more frequently. It is not difficult to determine the frequency of oil changes - if the press starts pumping too slowly, or jerkily, then it's time to check and top up or change the oil. When buying a hydraulic tool, you can immediately purchase KBT Hydraulic Oil for subsequent maintenance.
• • The resource of the tool is a loose concept. It depends on the intensity of use of the press - you crimp two tips a day, two hundred or two thousand. From the dimensions of the tips - if you crimp only the tips with a section of 25 mm², then the tool will last much longer than if you crimp the tips with a section of 150 mm². And so on.
    According to world standards, the service life of hydraulic tools is about 5,000 crimps, for pressing tongs - up to 10,000. The actual resource of the KBT tool reaches 10,000 and 30,000 pressings, respectively. But that's not the point. The main thing is that when correct use tool and its timely maintenance (replacement of sealing rings, topping up and oil change), the KBT tool is guaranteed from three to five years (depending on the type of product), which best characterizes its resource.
• • Yes, they fit. In the models PGR-300 "KVT", PGRs-300 "KVT", PGRs-300A "KVT", PGRs-300AM "KVT", PGP-300 "KVT" and PGP-300A "KVT" matrices are the same. Also, sets of high-precision matrices of the NM-300 "KBT" series are suitable for all these tools.
• • Matrices in these tools are made according to a certain “average standard”, which allows for crimping of aluminum and copper tips and sleeves made both according to Russian GOSTs and DIN standards. The quality of crimping with such dies meets all the requirements, and has been verified by many years of tool sales. But if you need to crimp the tip and be sure to get professional result, then we recommend using specialized high-precision dies of the NM-300 "KVT" series, designed for crimping certain series of tips.
• • It all depends on the type of quick couplings used. If they match each other, then it is possible. Couplings used on the tool trademark"KBT" have the following characteristics: M22 thread with a pitch of 1.25. If your pump or press has the same thread, then they can be used with KBT equipment.
• • Can. But for this, it is necessary to remove the fixed handle from the hydraulic presses, drain the oil, remove the rubber container, and only after that adjust the valve. It is not necessary to drain the oil from the pumps, but you will have to partially disassemble the case. Plus, the valve must be set correctly, which is quite difficult without practice. Based on this, it is better to leave the valve setting to the service center specialists.
• • Each tool has its own advantages and depends on the frequency and conditions of its use.
    For example, a mechanical tool can be used at any temperature (including negative temperatures), hydraulic tools can only be used at temperatures from -15 to +50 ° C (the KBT tool uses frost-resistant oil). The mechanical tool requires minimal maintenance, and the risk of breakage is extremely low. With some mechanical tools, you can crimp the tip faster - just press the handles together once.
    It is more profitable to use a hydraulic tool if it is used frequently - working with hydraulics is much easier physically. Most KBT hydraulic presses are equipped with a two-speed pump stroke mechanism, which significantly saves time during crimping. The automatic pressure release valve in the PGRs models protects the tool from damage.
    In a word, the choice between hydraulics and mechanics can only be made by a person, knowing the conditions tool operation.
• • Any work should be carried out on a disconnected line. If necessary, you can use special tool rated for energized operation and marked accordingly. As of today, there is no such tool in the KBT product line.
• • The decision to buy a mechanical or hydraulic tool can be made by a person who knows in what conditions this tool will be used. AT this case, all-weather and all-weather power tool, requires minimal maintenance, is virtually indestructible and works faster (when equipped physical strength) than hydraulics.
• • These are specially designed high-precision dies for crimping very specific series or standards of ferrules. 99% of the dies in an inexpensive tool are made according to some “average standard”, and they can be used to crimp different tips, but the crimping quality will still not reach the professional level. Until now, specialized matrices at a price of about 80 euros per pair (one standard size) were available only from large European manufacturers. Now they are also in our assortment. Matrices fit the most popular models hydraulic tools - presses PGR-300, PGRs-300, PGRs-300A, PGRs-300AM, PGP-300 and PGP-300A. If you clearly know which tips or sleeves you will use, and the guaranteed quality of the work performed is important to you, then the HM-300 "KBT" series matrices are your choice!
• • Such dies are used for crimping various tension, connecting and contact fittings and are made to order. There are four types of dies for each tool: round die "A" for crimping aluminum clamps (an example of designation A-24/PG-60 tons, A-54/PG-100 tons); round die "C" for crimping steel clamps (designation example S-17/PG-60 tons, S-44/PG-100 tons) hexagonal die "MSh-A" for crimping aluminum clamps (designation example MSH-13.8- A / PG-60 tons, MSH-60-A / PG-100 tons); hexagonal die "MSh-S" for crimping steel clamps (example of designation MSh-32-S/PG-60 tons, MSH-48-S/PG-100 tons); To order matrices, you must specify them inner size(depending on the fittings being pressed) and to which press it is needed. Matrix production time is about two weeks.
• • The main difference between the KBT tool is that the assembly and quality control is completely carried out at the KBT Kaluga plant. Particularly critical parts are also produced at the factory, other components are obtained from third-party enterprises. The similarity with the tool of other manufacturers or sellers ends appearance, and then, if you do not look closely. Most of the parts that make up the tool differ from similar parts in tools from other manufacturers, which has been repeatedly verified when we were contacted with requests for the repair of third-party tools. We make every effort to ensure that the tool comes out reliable and of high quality. Work is constantly underway to modernize and improve existing models. Warranty repairs and post-warranty service are carried out on the KBT tool.

Hello, dear readers of the Electrician's Notes website.

In today's article, I will share with you information about the crimping tool insulated tips- These are manual press tongs EGI-60 made in Italy. They are also called "crimpers". At the end of the article I will show specific example how to work with them.

A bit of history. The Italian company EGI began its activity back in 1973 and to this day is engaged in the production and production of professional tool for electrical installation. To be honest, I have no doubts about the quality of this tool. Maybe someone will refute my thoughts.

Here is the packaging.

Appearance.

EGI-60 are designed for crimping insulated:

• ring tips NKI
• fork lugs NVI
• pin round tips NShKI
• flat and plug connectors RPI-P, RPI-M, RSHI-P, RSHI-M (mother and father)
• piercing couplers OV
• connecting sleeves GSI

The matrix (sponges) of the EGI-60 pliers allows you to crimp the cores with a cross section from 0.25 to 6 (sq. mm). These pliers are just right for domestic use e.g. for crimping flexible stranded conductors wires and cables at, UZO, sockets, switches, chandeliers, lamps, counters electrical energy etc.

For production purposes, we have a hydraulic press that can be used to crimp conductors of wires and cables with a cross section of 16 to 240 (sq. mm). I will talk about it in more detail in my next articles. Subscribe to the newsletter.

The device and parameters of the press tongs EGI-60

Pincers have the strengthened three-hinged lever mechanism.

The handles are made of high-quality plastic, and the body material is made of steel.

The length of the handles is 15 (cm), which allows crimping with two hands. Although it is not difficult to cope with one hand.

The handles are connected to the jaws using pins with retaining rings.

The EGI-60 has a ratchet mechanism that mechanically blocks the opening of the handles until the crimping cycle is completed.

Thus, the risk of “underpressure” due to human error is reduced.

If, suddenly, you have chosen a tip or a core of an inappropriate section and have already begun crimping, then the ratchet mechanism can be unlocked at any time using the “dog”.

This model does not have a matrix pressure regulator.

The weight of these ticks is about 500-600 (g).

The pliers are equipped with a non-removable cast three-position matrix (or in simple words"sponges").

There are three standard crimps in the die. Each crimp for clarity is painted in the appropriate color:

• red - 0.25 - 1.5 (sq. mm)
• blue - 1.5 - 2.5 (sq.mm)
• yellow - 4 - 6 (sq.mm)

Manufacturers of insulated lugs, sleeves, connectors and taps specially produce them in accordance with these colors (insulating collars are painted), because it is very convenient for installation and speeds up the crimping process.

During crimping, each crimp puts a stamp on the body of the tip or sleeve with the following letter:

• red - I (1)
• blue - G (2)
• yellow - E (6)

These letters are so small that I could hardly see them. And even the camera could not clearly focus on them. So do not judge strictly by the photo.

How to use press tongs when crimping insulated ferrules

Crimping is one of the most reliable ways contact connections. I spoke in detail about the advantages of this method in an article about - follow the link and read.

Now let's move on to an example.

Remember the most basic rules of crimping!!!

1. How to choose the brand of wire?

Crimping of insulated lugs and sleeves is possible ONLY on multi-wire (flexible) copper wires. For single-wire (rigid) wires, bare lugs must be used.

As an example, consider compression copper wire PV-3 1x2.5 sq. mm (the new designation for this wire is PuGV).

2. What type and section of the tip should I choose?

The tips are not designed for one specific wire section, but for several ranges at once. Agree, very convenient.

Thus, for the considered wire PV-3 1x2.5 sq. mm, I chose the ring lug NKI 2-6, designed for a wire cross section from 1.5 to 2.5 (sq. mm).

The tip could be chosen not only as an annular NKI, but fork - NVI or pin - NShKI. It all depends on the operating conditions and connection method.

3. Stripping

We remove the insulation from the wire core to a length equal to the tubular part of the tip. To strip the insulation recent times I use .

It is the tubular part that is the point of contact of the wire with the tip - it can also be called the contact part.

The tubular (contact) part of the tip can be determined visually. Its diameter is somewhat smaller than the diameter of the insulating cuff.

After removing the insulation, the core of the wire must be twisted a little to avoid the occurrence of bends and plexuses of its individual conductors.

4. We put the tip on the wire

The stripped wire should protrude beyond the insulating collar by no more than 1 (mm), and it is better to be flush with its edge.

The insulation of the PV-3 wire must go inside the insulating collar until it stops with the tubular part.

We select the appropriate crimp on the matrix (in my example it is blue) and start the wire with the tip like this.

Because crimping is double-circuit (I talked about this at the beginning of the article), then make sure that one circuit compresses the tubular (contact) part of the tip, and the second - the insulated cuff over the wire insulation.

6. Tip crimping

We hold the wire from falling out of the tip and begin to squeeze the handles of the tongs until the ratchet mechanism is unlocked.

Crimping occurs by pressing to a certain depth the copper tip of the NCI into the copper flexible stranded wire PV-3 along the selected crimping profile.

After pressing in without fail we check the mechanical strength of the resulting connection and the integrity of the insulating collar.

On the surface of the insulated cuff, an imprinted brand in the form of the letter "G" is visible.

Here's what happened.

And this is the view from the back.

P.S. Now you can imagine how to crimp insulated ferrules using EGI-60 pressing tongs and their analogues. Thank you for your attention.

NShVI is Pin Sleeve Insulated Tips - if with a plastic skirt and NShV - if without it. They are needed in the electrical business a little more than nothing, because the topic, for the most part, is Kipovskaya. But people love it.

Therefore, let's look at some methods of crimping the tips, especially since there are many special crimpers for this task - a tool that can do nothing but compress bushings made of soft, thin metal.

To be pressed ... Then we will try to pull them off the end with our hands.




The wire is cut and stripped with a small margin solely for clarity.

Since this is not a comparative test, the crimper 2ART9303 from DKS immediately wins at the start, without undue intrigue.

Because he's sexy! And in an unexpectedly convenient pistol form factor. You just take it out, work calmly and comfortably, and everyone else suffers.



Presses this crimper with a square.





Presses on conscience. It does not wedge, the sponge does not warp. To crimp the six, a noticeable effort is required, and as a result, one of the tips could not be pulled off the wire by hand.

But similar in capabilities, capable of accepting from 0.25 to 6 squares, Chinese crimp HSC8-6-6

Presses hex. Tips pop off with no problem. A small one can also be pulled off, but it didn’t work on the camera after several attempts)

Another crimp with a larger caliber. Already up to ten square

Presses a square. Two and a half is too little for her, and the six is ​​crimped so tightly that even the skirt flew off in an attempt to pull the sleeve off the wire.

And finally universal tool for many tasks that already exist and cannot be found better ... Side cutters!

It is enough just to bite the tip with them, fixing it on the wire, and the terminal, for example, of an automatic machine or any other that requires an effort of at least 2 Newton meters, will compress everything as it should.





It was not possible to pull off the tip from the six. He lost the skirt, as in the case above, but the little one fell off, which, again, indicates that it is better to use a crimper for small sections, including so as not to spoil the same small terminals with a small, as a rule, tightening torque , do not tear off the slots, do not lose the tips, but thicker wires and side cutters will fit.

Thank you for your attention.

Hold your tail with a gun, a gun from the DKS and masterfully use side cutters!

When crimping conductors, one of the main conditions for obtaining high-quality contact and its reliable operation in the future is the use of a professional tool. One of these tools are press tongs or crimpers designed for crimping sleeve, insulated, bare lugs and automotive terminals.

Crimpers for automotive terminals and insulated lugs must have dies with a double-circuit crimping profile - along the core and along the insulation. Also, its geometry and shape must match the crimp part of the ferrule.

As a rule, it is best to buy sets at once, where the pliers themselves and all the necessary matrices are included.

Among domestic manufacturers stands out the company KBT and its two sets for crimping:

Consider their configuration, differences and principles of operation. Both of these sets are designed to crimp both insulated and non-insulated ferrules.

Press tongs CTB

The CTB set includes:

• press pliers themselves
• five numbered matrices
• plastic case

Press tongs have a mechanism for quick removal and replacement of dies.

Keep in mind that any matrix, like any part, has a run-in property. And during the first few dozen crimp cycles, it is quite possible that the tip may bite.

Sometimes the jam is such that the matrix jumps out of its quick-release mechanism. This does not at all mean a poor-quality tool, and over time, after running in, you will forget about such an inconvenience.

Actually, quick-detachable matrices are of course positive moment, but in practice there is really a lack of some mechanism for their rigid fixation. And the longer you operate the crimper, the more this mechanism is weakened.

Press tongs CTB are made of high quality steel. Equipped with a ratchet mechanism that provides a full cycle of crimping. There is also an asterisk with which you can adjust the clamping force.

In the upper part there is a lever that allows you to unlock the tool from any position.
If you choose the wrong die size and start crimping, the press tongs may not reach the very end, thereby locking the handles in an intermediate position. Here, just the same, you will need an unlock lever.

The handles are elongated, so that it is convenient to crimp with two hands. For relatively large sections and large volume work is very helpful.

Compared to other manufacturers, a small angle of opening of KBT crimper handles plays a significant role. For other models, in order to perform a girth, sometimes you need to have not hands, but large paws. A small angle of wiring allows you to use the tool with much greater convenience and comfort.

Matrices for press tongs

Why do we need as many as 5 sets of matrices? There is not only a difference in the cross section of the crimped lugs, but also in their functionality and size.

For each type of tips, you can choose your ideal option.
In the CTB press tongs, as in the CTF, the dies are interchangeable, which makes these sets absolutely compatible and can significantly save your budget.

Most often, you have to use dies designed for crimping insulated and non-insulated sleeve lugs of the NShVI and NShV brands. The matrix is ​​digitally marked along the cross section of the tip.

These dies are specially designed to form a solid pin at the end of a stranded strand.

To give mechanical strength a special corrugation is applied on the inner surface of the crimping profile.

The MPK-02 model matrix fits the most popular series ferrules section from 0.25 to 6mm2.
And what to do if you have a sleeve end with a cross section of as much as 25mm2? Here you will be rescued by the matrix of the MPK-03 model. This die already crimps insulated and non-insulated ferrules from 10 to 25mm2.

For crimping double end sleeves of the NShVI-2 brand, you need to use the MPK-06 matrix. It has 7 positions and crimps ferrules from 0.5 to 6mm2.

Keep in mind that it does not come with the tool and you will have to buy it separately. You can get acquainted with the current prices and choose a set of matrices for yourself.

There is another way out of the situation. If you need to crimp the double tip of NShVI-2, and there is no way to buy a matrix for it, use the ordinary MPK-02 matrix.

The only condition is that you need to crimp such a NShVI-2 with a connector one size larger.

That is, when you have a double tip with a section of 4mm2 NShVI (2) -4-12, then you need to press it with a matrix designed for a single one under 6mm2.

The set also includes an MPK-01 matrix for insulated connectors of the brand NKI, NVI and the like. It is designed for sections from 0.5 to 6 mm2.

Well, the last two sets of matrices are MPK-04 - for auto-terminals and MPK-05 - for bare copper tips.

The dies are inserted into the pliers in such a way that the side of the die with the smallest section of the crimping profile is always located at the edge of the jaws.

Sleeve tips NShVI this crimper compresses with a trapezoid. Such a crimp profile is quite wide and may cause some connection problems with individual equipment. Keep in mind that when connecting wires to starters of the second magnitude, after crimping wires of relatively large sections with a trapezoid, sometimes you have to put them into contacts sideways.

Press tongs set CTF

This set also includes 5 matrices. True, there is no longer a quick release mechanism.
To replace the matrix, you will have to use a hex key. Which is not very convenient and can take much longer than the compression process itself.

Of course, you can do amateur activities and somewhat modernize the process of removing matrices. To do this, nuts can be soldered onto the factory screws, which are already easy to twist by hand without the use of hexagons and special keys.

Also included are 2 spare screws from the dies in case you lose the current one or ruin the threads on them.

The lack of a quick release mechanism is of course one of the main disadvantages of this tool. Imagine you are sitting in front of a closet, in which there are a couple of hundred conductors. All of them go in order, of different sections and sizes, and they need to be crimped accordingly. How much extra time and nerves it will take you to unscrew and twist the matrices, the question is far from rhetorical.

When inserting dies into CTF pliers, in order not to be mistaken, look at the size of the crimping slot. big size insert in the direction of the handles, with a smaller one - in the groan of the nose of the tool. The vertical positioning of the matrices also plays a role.

A reasonable question arises, why do we need a CTF set with an inconvenient process for replacing dies, if there is a CTB press tongs with a quick release mechanism?

The fundamental difference of CTF is the parallel closure of matrices. This form of crimping is the most important advantage over any other pressing tongs.

When using conventional press tongs, the crimping of insulated and non-insulated ferrules first occurs from one edge, then in the center, and only at the end the ferrule is crimped entirely.

But the CTF model has such a design that the jaws on it close in parallel from top to bottom. Therefore, crimping occurs evenly and immediately over the entire surface of the tip.

Parallel closure of matrices provides more high quality connections.

True, it is possible that you have chosen the matrix and the tip, it seems to be correct, and the wire after crimping is still poorly clamped inside the sleeve. How is this possible?

And the reason here lies in an unscrupulous cable manufacturer. It is they who can make the wire, relying on their specifications, and not on GOST. As a result, the cross section is not 1.5 mm2, but less than 1.25-1.3 mm2. You, however, clamping it all with a 1.5mm2 matrix, naturally cannot achieve the result you need.

On new pliers, nothing needs to be adjusted. The factory settings are set optimal conditions crimping. However, during long-term operation, the matrices can become loose and play and slack appear.

Adjustment is carried out using an eccentric. Unscrew the stopper screw and turn the sprocket. To the plus side, if you need to increase the convergence of the matrices and to the minus side, if, on the contrary, to weaken.

The manufacturer KBT for its crimpers says that it guarantees crimping of lugs in 30,000 cycles without loss of crimping quality.

Also ctf pliers have:

• unlocking mechanism from any position

• handle lock button

By the way, the handles here are no longer elongated and it’s no longer possible to comfortably grab them with both hands.

Why do you need to fix the handles? Imagine that you are standing on a stepladder and, under the ceiling, are crimping the handpiece sleeve in the junction box with one hand. You need to put it on the wire, put it in the right slot of the matrix and fix it before finally pressing it.

It will be problematic to do this in one go due to the uncomfortable position and cramped working conditions. Here, just the same, the fixing mechanism is indispensable. They inserted the sleeve, tightened it, intercepted it and squeezed it properly.

It is not recommended to crimp solid wires with CTB and CTF press pliers. To do this, you need to apply more effort and the ratchet mechanism must be designed for this. In this case, it is better to use other brands of tools from KBT. For example, a crimper - PK-16u and PK-35u.

In general, both sets of CTB and CTF can complement each other and be indispensable assistants when crimping sleeve insulated, non-insulated and other types of thin-walled sleeves and tips.

Of course, it is quite enough for the master of the station wagon to have one of them. However, remember that versatility doesn't always pay off. It is much more reliable to have a set of exactly tongs, and not a set of matrices for one press tongs.

Sets of press tongs CTF and CTB in online stores can be purchased within 5000 rubles.
The pliers themselves with only one matrix will cost at least two times cheaper. Choose for yourself required option can .