High-quality connection of electric circuits in the car is the foundation of stable operation of the entire on-board network, from the starter to the multimedia system. The use of twists or soldering in conditions of constant vibration, temperature changes and humidity often leads to oxidation of contacts and loss of signal. That's why. wire-tipser It is an indispensable tool in the arsenal of any car electrician, providing reliable mechanical and electrical contact.
Incorrectly selected or defective terminal can cause local overheating, melting of insulation and even fire of the vehicle. The modern market offers many solutions, from simple hand-held models to hydraulic systems for industrial scale. In this article, we will discuss in detail how to choose the right tool, what types of tips exist and why. high-quality pressing is impossible without strict compliance of the tool matrix with the diameter of the vein.
For a beginner, it may seem that it is enough to squeeze the metal hard with passages, but a professional approach requires adherence to technology. We will consider the nuances of working with copper and tin terminals, the features of using shrinkage and typical mistakes that even experienced masters make when in a hurry. Understanding the physics of the crimping process will help you avoid wiring problems in the future.
Classification of tools for pressurization
The choice of the right tool directly depends on the scope of work and the type of tips used. Simple bogocreas or pliers cannot provide uniform pressure on all sides, leading to deformation of the sleeve and weak contact. Professional comb-head It is designed to squeeze the metal strictly according to a given profile, ensuring that there are no gaps between the residential wire and the walls of the terminal.
The most common mechanical mites with a ratchet mechanism, which does not allow the sponge to be unclothed until the complete compression cycle is completed. This eliminates the human factor and ensures that the master does not unplug the connection. There are also universal models with adjustable matrices, allowing you to work with different sizes of terminals without changing the tool.
- 🔧 Tick-like models compact, lightweight, ideal for working in hard-to-reach places under the hood.
- 🔨 Hammer-type - require impact, are used for large-sized tips of large cross-section.
- 🤖 Automatic ticks independently adjust the degree of compression depending on the thickness of the wire, minimizing the risk of error.
For automotive electricians, ticks with sectoral or semi-closed matrices are most often used. It is important that the tool has a clear marking of the cross sections, for example. 0.5-1.0 mm2 or AWG 22-18. Using the tool for other purposes, for example, an attempt to squeeze the power tip of the starter with small ticks for weak current, will lead to breakage of the sponges.
Types of car tips and terminals
Car wiring requires the use of specific connectors that are resistant to vibration. The main material for quality terminals is oxygen-free copper, often coated with a layer of tin to protect against corrosion. Meadow tips It is much easier to enter the sleeve and provide better electrical conductivity compared to pure copper, which oxidizes over time.
One of the most popular varieties are ring and fork terminals. Ring variants provide maximum contact area and cannot jump off the bolt without its full twisting, which is critical for power circuits. Fork terminals are more convenient for frequent maintenance, as they allow you to loosen the bolt without removing it completely, but they are less resistant to vibration loads.
Special attention should be paid to isolated tips with a plastic cuff. When pressing, not only the metal part is compressed, but also a plastic tailing, which additionally fixes the wire and prevents it from breaking off at the base. This is especially true for thin alarm wires or audio systems.
Slices (splices) are used to connect two wires together. They can be a passage, where wires are inserted on both sides, or deaf, where wires are inserted on one side. When choosing, it is important to pay attention to the internal structure: the presence of notches or pins inside the sleeve improves contact and prevents the veins from turning.
Technology of correct crimping: step-by-step instructions
The process of establishing a reliable connection requires consistent execution of operations. First, it is necessary to clean the insulation of the wire for a length equal to the length of the metal part of the tip. It is important not to damage the veins themselves, since the cut copper will be the site of a future fracture. For cleaning, it is better to use a specialized stripper, tuned to the appropriate section.
Then the wire is inserted into the tip to the point. If an insulated terminal is used, the insulation of the wire should slightly fit under the plastic cuff. Crusher for the tips is placed perpendicular to the terminal axis. Compression is made by a confident movement until the snap of the forklift opening (if it is provided by the design).
☑️ Checklist of high-quality installation
After the mechanical connection, it is recommended to check the quality of the contact. The wire shall not be pulled from the terminal under moderate tension. If the compound is planned to be operated in an aggressive environment, the junction of the insulation and metal can be further heated with thermophen (for thermal shrinkage) or treated with dielectric lubrication.
⚠️ Attention: It is strictly forbidden to squeeze copper tips with aluminum or steel matrices, as well as to use brass terminals for power chains. Brass is fragile and can crack when vibrating, which will lead to sparkling and fire.
Table of section conformity and colour marking
For convenience of work, manufacturers of insulated tips have implemented a single system of color marking. This allows you to quickly identify the range of cross-sections that a particular terminal can work with without resorting to a micrometer each time. However, it is always worth checking the labeling on the packaging, as the standards may vary slightly between different brands.
Below is a table matching colors, wire sections and tip types, most common in the automotive industry. Compliance with these standards makes it easier to diagnose and repair an electrician.
| Colour of insulation | Wire cross-section (mm2) | American Standard (AWG) | Typical application |
|---|---|---|---|
| Red. | 0.5 - 1.5 | 22 - 16 | Signaling, lighting, sensors |
| Blue | 1.5 - 2.5 | 16 - 14 | Headlights, fan, audio system |
| Yellow | 4.0 - 6.0 | 12 - 10 | Power circuits, amplifiers, starter |
| Grey/Black | 10.0 or more | 8 and thicker | Power intake, battery terminals |
When working with multi-core wires of large cross-section (more than 16 mm2) color marking may be absent, and should focus solely on the numbers embossed on the metal part of the terminal. In such cases presser It should have appropriate replacement matrices.
Common Mistakes and How to Avoid Them
One of the most common mistakes is to use a matrix that is too large or too small. If the matrix is large, the crimping will be weak, and the wire will fall out. If small, you can cut the veins or deform the hole under the bolt, which will make it impossible to install the terminal on the contact. Always check the marking on the handles of ticks with the diameter of the wire.
Another problem is "unaffordable." Often, the masters are afraid to make an effort and stop ahead of time. A good squirrel requires a confident effort. If you use a tool without a ratchet, control the process visually: the metal should fit tightly around the wire, leaving no gaps.
What to do if there is no special tool at hand?
In an emergency, pliers can be used, but the result will be temporary. It is necessary to squeeze at several points in a circle, trying to give the terminal the shape of a hexagon. However, such wiring should be replaced at the earliest opportunity, since the reliability of such a connection is low.
Do not forget about the state of the instrument itself. Dulled edges or loose hinge will not give a qualitative result. Check periodically wire-tipser for backlashes and clean the working surfaces from oxides and dirt.
⚠️ Attention: Never use crimping mites to snack on hard wire or steel. The stains are only for the softer edges. Snacking on steel springs or braces will instantly disable an expensive tool.
Tool care and storage
In order to comb-head He has served for many years and has not failed at the most inopportune moment, he needs to be properly cared for. After completion of work, it is recommended to wipe the working surfaces with dry rags, removing the residues of lubricant and metal dust. Periodically, the hinge of the tool should be lubricated with light engine oil.
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. If you work with different types of terminals, make sure that the interchangeable matrices (if they are removable) are not lost and lie in their cells.
Tip: To check the quality of cleavage at home, you can use a stretch test. Fix the squeezed wire in the visceral (through soft sponges) and try to pull it out with passages. If the wire popped out, the cleavage is poorly executed.
Compliance with simple rules of operation will allow you to maintain the accuracy of the tool. Remember that cheap Chinese counterparts are often made of soft metal, which deforms after 10-20 cycles. Investing in a quality branded tool will pay off with the reliability of all your electrical connections.
Frequently Asked Questions (FAQ)
Can I squeeze a tinted wire into a stainless terminal?
Technically possible, but not recommended for long-term connections. Different metals (tin and copper) can create a galvanic pair, which will accelerate corrosion in humid conditions. It is better to choose the terminals in the color of the wire or use tinted options for both components.
What is the difference between a composter for tips from ordinary passages?
Passages compress the object chaotically, often deforming it. Specialized squirt has profiled sponges that crush the metal terminal in a strictly defined geometric shape (hexagon, square), providing maximum contact area and mechanical strength.
Do I need to sell the wire after crimping?
When using high-quality wire-head And compliance with the ration technology is not required and even harmful. The solder fills the voids, but when vibrating it can crumble, as it is a soft metal. Proper mechanical crimping creates a “cold welding” that is more reliable than soldering in a car.
What tool to choose for a beginner?
The best choice will be a universal tick-shaped tool with a ratchet mechanism and cross-section adjustment. It is easy to use, automatically doses effort and prevents marriage in work, which is critical in the absence of experience.
Why did the terminal crack when you squeezed?
Most likely, a silumin or brass terminal was used instead of copper, or a tool too powerful for this size was used. Also, the reason may be the low temperature of the metal (in the cold, the metal becomes brittle), so in winter it is recommended to warm up the terminals before work.
The reliability of automotive electrics depends on the quality of contact connections by 90%. Use a specialized tool for a specific size of terminals and do not save on consumables.