Poor contact in the BNC or RCA connector leads to ripples, interference or complete disappearance of the image on the monitor of the video surveillance system. It is to eliminate such defects and create a reliable connection of the vein with the contact group of the connector that a specialized tool is used - video clipper. Unlike network equipment, where twisted pair dominates, analog and hybrid systems require coaxial cable, which has a central vein, dielectric, screen and outer shell. Errors at the stage of fixing the connector often cause unstable operation of the entire security system, so understanding the principles of the tool is critical for the installer.

The process of creating a connection requires not only the presence of a suitable device, but also strict adherence to the technology of cleaning and positioning the wire. RG-6 or RG-59 The cables have different insulation thicknesses, which dictates the need for interchangeable matrices or universal heads. An improperly selected compression force may either fail to provide electrical contact or deform the central vein, making signal transmission impossible.

⚠️ Note: Using pliers or cutters instead of a specialized crimper is guaranteed to damage the cable structure and an unreliable connection that will fail at the first vibration.

Constructive features and principle of operationThe basis of any professional tool for mounting video connectors is a mechanical force transfer system. krimper It works on the principle of a lever, allowing you to apply a significant compression force to the metal contact, deforming it around the conductor. Unlike soldering, where the connection occurs due to metal fusion, cold welding is formed here under high pressure, which ensures the durability of contact in conditions of temperature changes.

The inner part of the tool is equipped with interchangeable or fixed sponges, the shape of which exactly corresponds to the geometry of the connectors used. For video systems, the most common matrixes for connectors of the BNC (bayonet) and RCA (tulips) type are used. Some models are equipped with a built-in knife to clean the insulation, which speeds up the process, but professionals prefer to use a separate knife. stripper for more accurate control of the depth of the cut.

⚠️ Note: When working with coaxial cable, it is strictly impossible to allow damage to the central copper vein or shielding braid with a knife during cleaning, as this changes the wave resistance of the line.

Types of tools for installation of video connectors

The market offers several categories of tools, differing in functionality and scope. The choice of a particular model depends on the scope of work and the type of connectors used. For one-time work, a simple manual option is suitable, while for large-scale installation of large objects, more complex solutions are required.

Main types of instruments:

  • 🔧 Hand-held crimperes – compact devices for squeezing individual connectors BNC, RCA, F-type, ideal for field work.
  • 🔩 Universal mites are models with interchangeable matrices that allow you to work with different types of connectors and cable cross-section.
  • ⚡ Semi-automatic models are tools with a rattling mechanism that prevents the sponge from being compressed until the complete compression cycle is completed.

It is worth noting separately. crimperwhich independently adjust the degree of compression depending on the type of connector inserted. Such devices minimize the impact of the human factor, but have a high cost. For most tasks in the field of security and automotive video editing, a high-quality hand tool with ergonomic handles is enough.

Selection of connectors: BNC, RCA and F-connectors

Compatibility of tool and consumables is a key factor in success. Video equipment most often uses three types of joints, each of which requires a specific approach to crimping. BNC connectors are soldered and crimped; for the crimper suitable only the latter, having a special sleeve for pressing.

Connectors RCA (known as "tulips") also have crimping versions where the central contact and the external screen are fixed separately or simultaneously, depending on the design. F connectors, often used in satellite and cable television, are twisted or squeezed, and the latter also require an appropriate profile of the crimper sponges.

Compatibility of materials

Not all crimping connectors are universal. There are versions for double-shielded cables and for cables with a central vein of different diameters (Solid or Multi-strand). Always check the labeling on the connector packaging before buying a crimper.

Step-by-step instructions for cable cleavage

The quality of the connection depends on the preparation of the cable. Before starting work, it is necessary to remove the external insulation without damaging the shielding braid, then bend the screen and remove the insulation from the central vein. The stripping length must strictly meet the requirements of the particular type of connector.

☑️ Installation checklist

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The process of clenching is as follows:

1. The cleaned cable is inserted into the connector to the point.

2. The structure is placed in the appropriate groove crimper.

3. The handles are reduced to a characteristic click (if there is a rattle) or to a complete closure of the sponges.

4. The finished connection is removed and checked visually.

📊 What type of cable do you use more often?
RG-59 (thin)
RG-6 (thick)
Twisted pair with adapter
Coaxial with dual screen

Typical errors and diagnostics of malfunctions

Even with a good tool, installers often make mistakes that lead to marriage. The most common of them is the insufficient depth of the cable insertion into the connector, which is why the central vein does not reach the contact or, conversely, goes beyond the limits. It is also common to have poor screen contact if the braid has not been evenly distributed over the connector body before crimping.

A critical mistake is to use connectors that are not designed for squeezing, with an attempt to fix them with a crimper, which leads to the destruction of the connector housing. If after installation on the screen there are horizontal stripes or the image is black and white, first of all check the integrity of the central vein and the absence of a circuit on the screen.
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The reliability of the video system depends on the quality of the connections, so saving on the tool for crimping is unacceptable.

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Tip: After crimping, always slightly pull the cable and connector in different directions to make sure the mechanical strength of the connection before installing in hard-to-reach places.

Frequently Asked Questions (FAQ)
Can I squeeze a video cable without a special crimper?

In theory, pliers can be used, but the quality of the connection will be extremely low. It is likely to damage the central vein insulation or not provide sufficient contact, which will lead to loss of signal.

What is the difference between a BNC connector soldered and crimped?

Connectors for soldering have a contact patch for soldering the central vein and are fixed by a screw or crimping only the outer part. The crimping versions do not require soldering and are fixed completely mechanically by compressing special bushings.

How to choose a Crimper for RG-59 and RG-6?

You should choose a universal model with the labeling of support for both types of cables or a set with interchangeable matrices, since the diameter of the insulation of these cables is different.

What if there is no signal after the clench?

Check with the tester the integrity of the central vein, the absence of a circuit between the living and the screen, and also make sure that the connector sits tightly on the socket of the device.