Poor contact in the electric circuit of the car often occurs precisely because of poor-quality connection, where the wire is simply twisted or squeezed by pliers. Krimper for clenching tips solves this problem by creating a reliable deformation of the metal, which guarantees a stable current transfer even in conditions of constant vibration. Using an inappropriate tool or disrupting technology results in contact oxidation, heating and, in the worst case, wiring fire.
Choosing the right tool requires understanding the difference between the types of tips and the cross-section of the wires to work with. Modern professional models automatically adjust the compression forceexcluding the risk of indecision or squeezing of the vein. In this article, we will discuss how to choose the perfect tool, customize it and avoid common mistakes that even experienced wizards make when installing an electrician.
Design and principle of operation of the tool
The basis of any high-quality crimper is a precision compression mechanism that provides uniform pressure on all sides on the sleeve of the tip. Matrixes (working sponges) of the tool have a specific geometry corresponding to the profile of a particular type of terminal. When the handles are compressed, the force is transmitted to the tip, crushing its walls around the cleaned wire, which creates a monolithic connection.
Many models are equipped with a ratchet mechanism that does not allow you to unclutch the sponges until the compression cycle is complete. This is a critical function to prevent unpressed wire from being pulled out. If you feel that the tool is “jammed” in the middle of the turn, then the blocker has worked, and the cycle must be completed before the end.
The design also often provides adjustable stops, allowing you to precisely position the wire in the matrix. Adjustment of the clench length The depth of the sponge immersion allows you to adapt one tool to different types of insulation and terminal sizes. Without precise adjustment, damage to the insulation or insufficient contact of metal surfaces is possible.
Classification of Crimperes and Types of Matrixes
The market offers many modifications to the tool, and the choice depends on the amount of work and the type of tips used. Tick-like models They are suitable for fast work in hard-to-reach places, while frames provide more powerful and uniform compression for thick wires.
Matrixes can be fixed or interchangeable. Interchangeable sets allow you to use a single crimper case to work with different standards, such as: NWG, DIN Or car connectors. This saves space in the toolbox and reduces overall equipment costs.
Special attention should be paid to tools with built-in cleaning function. They allow you to remove the insulation and make a crimping with one device, which speeds up the installation process. However, for very thin or, conversely, armored wires, it is better to use specialized strippers.
When choosing, you should pay attention to the material of sponge manufacturing. Tempered steel with anticorrosion coating lasts longer and keeps the geometry under load. Cheap soft metal analogues are rapidly deformed, leading to defection in the compounds.
Preparation of the wire and selection of the tip
The quality of the connection directly depends on the correct preparation of the veins. Before crimping, it is necessary to precisely clean the insulation without damaging the copper veins. Copper incisions reduce the strength of the joint and can lead to a break under load.
The choice of the tip should strictly correspond to the cross-section of the wire. Using a smaller diameter sleeve will lead to the extrusion of the veins, and too large a size will not provide the necessary contact. Color marking on the insulators of tips helps to quickly navigate: red usually means 1.5-2.5 mm2, blue - 2.5-4 mm2, yellow - 4-6 mm2.
Always twist the multiwire wire before inserting into the tip so that all veins enter evenly and do not stick out from the side.
It is also important to consider the material of the wire. Aluminum cables require special tips and quartz-vaseline lubrication to prevent oxidation. Copper tin tips are suitable for most automotive tasks and work in high humidity conditions.
Step-by-step cleavage instruction
The process of crimping requires consistent execution of operations to achieve a guaranteed result. First, the wire is stripped for a length equal to the length of the tubular part of the tip plus 1-2 mm of reserve. Then the wire is inserted into the sleeve to the point.
☑️ Checklist for proper crimping
Place the wire tip in the appropriate socket of the crimper matrix. Make sure that the sleeve seam (if any) is directed upwards or towards the side specified by the tool manufacturer. Smoothly and confidently squeeze the handles until the snap of unlocking the ratchet.
After the cycle is completed, visually inspect the connection. The tip should not have cracks, and the wire should hold tight. A light sipping of the hands will help to make sure the reliability of the fixation. If the wire is pulled easily, the operation must be repeated with a new tip.
Table of correspondence of sections and colors
For quick navigation when working with different types of insulated tips, it is convenient to use a reference table. It helps to avoid mistakes when selecting tools and consumables in conditions of poor lighting or rush.
| Wire cross-section (mm2) | Colour of insulation | Typical size (AWG) | Hole diameter (mm) |
|---|---|---|---|
| 0.5 - 1.0 | Black/Brown | 22 - 18 | 2.0 |
| 1.5 - 2.5 | Red. | 16 - 14 | 2.5 |
| 2.5 - 4.0 | Blue | 14 - 12 | 3.5 |
| 4.0 - 6.0 | Yellow | 12 - 10 | 4.5 |
Note that color coding may vary slightly from manufacturer to manufacturer, so always check the labeling on the package. Exact matching The cross-section and color ensure that the Crimper matrix will close with the desired force.
Typical errors and their consequences
One of the most common mistakes is to use universal pliers instead of a specialized tool. This results in flattening of the tip on only two sides, whereas a round clamp provides contact throughout the circumference. This connection is quickly shaken by vibration.
⚠️ Warning: Attempting to squeeze two wires in one tip without first twisting or using a special double sleeve often results in one of the wires remaining unclamped.
Another mistake is the incomplete introduction of the wire into the sleeve. In this case, the part of the veins remains outside, which reduces the current conductive ability of the contact and creates a point for corrosion. Always monitor the depth of the landing.
The Secret of Durability
Process the finished connection with a spray preservative for contacts, this will extend the service life of the node by 2-3 times.
Ignoring the compression force setting on adjustable crimperes leads to either a breakage of the tool or a marriage. If the matrices close too tightly, they can cut the veins; if weakly, the contact will rattle.
Maintenance and storage of the tool
The Krimper, like any precision instrument, requires careful treatment. After work, it is necessary to clean the sponges from metal shavings and dust. Periodic lubrication of hinge joints with a special oil will prevent jamming of the mechanism.
Store the tool in a dry place, preferably in the original case or case. Moisture on unprotected metal parts can cause corrosion, which will spoil the geometry of the matrices. Regular inspection Sponge attachment screws are also necessary to maintain accuracy.
If you notice that the tool has begun to “chew” the insulation or not fully compress the shells, check the adjusting screws. In most cases, the problem is solved by simple adjustment without contacting the service.
Frequently Asked Questions (FAQ)
Can uninsulated tips be squeezed with a regular crimper?
Yes, you can, but it is better to use a matrix without plastic stops, so as not to damage the metal. Uninsulated sleeves often require more powerful mites with profile sponges.
How often should I change the matrices on the Crimper?
In professional use, the matrix lasts for years. Replacement is required only if you notice the development of a profile, crack or if the tool has ceased to give a high-quality crimp even after setting up.
What is the difference between type B and type C?
Type B (square) is used for most standard tips, providing uniform compression. Type C (trapezoid) is used for specific connectors and requires the appropriate shape of the tool sponges.
Do I need to squirt the wire before squeezing?
No, hunching the wire before squeezing in a car electrician is strictly not recommended. The solder under the influence of vibration becomes fragile and crumbles, disrupting contact. Use only mechanical compression of pure copper.