How to choose a construction knife with replaceable blades. Assembly knife: varieties, application, choice. Which knife to choose

Or it is also called clerical - this is a real find. After all, it is practical and is needed everywhere: for needlewomen, designers, builders, repairmen household appliances etc. Initially, as soon as such a knife was developed, it was intended for cutting paper, but very soon its scope expanded significantly. Now the construction knife is used for cutting cardboard, paper, foam, leather, thin plastic, for stripping wires and the like.

Today, there are many different variations of knives on the market, but among specialists there are two main types and they are divided according to two parameters:

By the material of which the body is made.

Why by these parameters? The answer is simple, it is these two parameters that most attention is paid to when choosing a construction knife.

- knife with a blade of 18 mm.

When renovation worksah, they use a knife whose blade width is 18 mm, it is he who is called a construction knife. The other two types are used more for home or design work.

Construction knife is very popular and is in every specialist's bag. And this is not without reason, because a construction knife has a number of advantages that you need to know about:

Versatility and wide scope;

It does not require sharpening, as most knives have a blade that breaks off, and in those knives where the blade cannot be broken off, it simply changes to a new and sharp one;

Safety in use. has a special lock on the body that reliably holds the blades in the installed position. In addition, you can adjust the length yourself.

What to look for when buying a construction knife:

We decide on the material of the case;

It is imperative that the knife fits well and comfortably in the hand;

It is better to choose a knife with metal fasteners and buttons for adjusting the blade, since plastic is not very durable, especially if the knife is used for repair work;

Pay attention to the quality of the blade, it is desirable that it be made of high quality stainless steel.

By affordable price it is possible in the Master Plus online store. We are here for you! Enjoy the shopping!

Each of us is familiar with such a tool as a knife. We use knives in the kitchen, there are stationery knives for papers, and there is a large diverse group of special knives - construction knives.

Their variety is characterized by design differences and tasks that are solved with the help of these knives.

Construction knives differ from the rest in their special purpose - to cut very hard, dense, thick and durable materials, so the blades are made of special high-strength alloyed metals or stainless steel. The cutting part is very diverse, which allows you to even cut patterns on the linoleum when laying it. Structurally, the handle of construction knives is adapted to the hand of the master, mainly made of plastic and covered with anti-slip material, such as rubber or rubberized plastic. You can buy them in special hardware stores, for example.

Let's take a look at the variety of construction knives

Structurally, they differ from each other in that in their appearance they are folding or pocket, where the name speaks for itself, and knives, which have the ability to replace the blade.

The type of knife is determined by the main task that is posed when carrying out certain works:

• Corner knives are used when working with wallpaper, with leather products, linoleum, if necessary, curly cutting, fabric, plastic, in gardening;
• Special knives for cutting special surfaces, for example, carpet, drywall;
• Folding or assembly knives for working with electric wires and cables. These knives have an insulating handle.

For the right choice construction knife on the link, you must be guided by the following basic criteria:

• The size and thickness of the cutting part affects the strength of the tool;
• The possibility of sharpening or replacing the blade increases the life of the knife;
• Blade guides allow cutting thick and laminated materials;
• The durability of the knife provides a titanium coating of the blade;
• The presence of a marking on the blade allows you to adjust the depth of the cut;
• The segmented blade does not need sharpening, it can simply be broken off and the next section will be just as sharp. When the segments end, the blade changes to another. This is the most popular type of construction knife;
• Particular attention must be paid to securing the blade. Exactly this weakness in the design of many construction knives, on which the safety of working with it depends.

We have considered all the features of construction knives and are sure that everyone can now choose the right one for themselves necessary tool in accordance with the assigned tasks. Good deeds to you.

A builder needs a knife no less than a hunter and may need it at any moment. Therefore, its permanent place in the narrow pocket of the overalls or in the bag on the belt.

What should be a construction knife. Which to choose?

• He must be a long-liver. With daily use, one year without breakage is a good indicator for an inexpensive tool;
• The blade removal mechanism should be light and simple. The performance of the tool depends on this;
• It should be lightweight. Carrying in a simple trouser pocket shouldn't feel like it. Only in this case the knife will not be burdensome, and always at hand;
• The blades of the knife should be with breaking off segments.

Which knife to choose.

Consider the most common options for knives with replaceable blades.

The price is about the same for everyone. Weight and other external characteristics do not differ. The only difference is the different blade locking mechanism. This is the whole problem.

In the first knife, the blade extension mechanism is weakest. It is rather office option knife, not construction. He stops holding on the second day.

The second type of knife is the most common. But the mechanism also fails him. The clamping wheel holds it securely, but you need to twist it a little bit, literally half a turn.

If the knife has one owner and the above condition is met, the knife can serve for a long time. But if you squeeze the wheel when fixing the blade, the screw makes dents in the body, which then interfere with the free extension of the blade.

So, if in the first copy the blade ceases to hold, as it is used, then in the second, on the contrary, you cannot move it.

The most reliable mechanism was found in the third copy. The knife securely fixed and extended the blades throughout the year.

Then the plastic handle came off, and I decided that it was time to change. And threw it out. But as he had not acquired a new one, he decided to use the old one temporarily. And lifted it up. The time period dragged on. The knife continued to serve reliably, without deteriorating its qualities. On the contrary, without the plate, the knife became weightless. Of course, this option will not work for a drywall worker. But if a knife is needed for auxiliary functions - sharpening a pencil, opening bags or cutting off mosaic sheets, then this is the best option.

Now, when I buy a new knife, I immediately break off the plastic handle.

But this knife also has two options. The first one is expensive, made of stainless steel. A great option. The second is cheap, mild steel. This is a bad decision. The blade, during operation, cuts through the body, and it is no longer possible to work with such a tool.

two "almost" identical knives

blade attachment mechanism for knives

How to change a blade in a knife.

This is the most simple task, even a child can do. But if you have not seen how this happens, confusion can arise. In the video below, which shows the best (of the three considered) version of the construction knife, the moment of changing the blade on the construction knife is present.

The sharpest construction blades are shown in the video.

Every self-respecting person who, in one way or another, refers to himself as a construction fraternity, has his own construction knife with replaceable blades. It can come in handy in any situation, be it opening a bag of putty or cutting a sheet.

How to choose a knife?

In order for the assembly knife with replaceable blades to serve faithfully, it is necessary to initially choose it according to the correct parameters, which, however, everyone sets for himself. Here's what to look for when buying:

Advantages of this type of knife

Thanks to their long blade, they can be used very flexibly, for example, to cut even thicker materials such as foam. The blade is secured in the appropriate position that they need for certain jobs, such as removing cables.

Disadvantages of incisors are

In the event of lateral forces, the blade can break very quickly and injuries can occur. Since the blade does not retract into the housing, in practice there are many accidents where users move around with a free-standing blade or leave it extended. By simply breaking the front segment, you cut the blade quickly and comfortably. ... While some of the cutters are also known as carpet knives, a carpet knife is always equipped with a trapezoidal blade or hook.

• the most important thing is that the retractable mechanism in the construction knife should work perfectly. Indeed, it often depends on this the speed and consistency of the work process;
• construction knives with a retractable blade should be without various "bells and whistles" in order to perform the simplest function - to cut;
• the weight of the knife has great importance - the lighter it is, the more convenient it is to carry it with you, putting it in your trousers pocket.

You should pay attention to the knife slider - if it is plastic and has a rather dubious appearance, then most likely it is not a construction knife, but a clerical knife that is not suitable for applying force. Due to pressing, the mechanism breaks down very quickly and stops fixing the blade.

The switches are too fast out of control when the lateral forces are too high, so these cutters are not suitable for heavy cutting. Thus, the carpet knife has a replaceable trapezoidal blade or hook blade. Duden refers to a carpet knife as a knife with a replaceable blade.

Disadvantages of hook protection cutters

Maximum safety of your sales and / or production goods from damage caused by the blade. Cutting with cutting knives should only be done 1-2 times as they must be guided under right angle to cutting material... Since you are only cutting a very small area of \u200b\u200bthe blade, only that area is worn out and the blade needs to be replaced more often, such as a carpet knife with a trapezoidal blade.

• Maximum safety for the user from any incisions.
• Only one knife for all activities.
• The blades feel faster.

Other names for this type Cutting knives or cutting tools are also deburring shears, hobby knives, hand knives or model knives.

A knife with a plastic wheel is better if you don't grip it too hard. After all, if you drag it once, you simply cannot unscrew it the second time, and the knife can be safely thrown away.

The most durable knives for construction work presented in hardware stores are those that are equipped with a metal wheel and the knife itself is also made of metal. But when buying, you should be careful not to accidentally buy a knife made of mild steel, but stainless steel will be just right.

All functions of the knives can be found. An essential feature of scalpels is the very thin handle that resembles a pencil. Therefore scalpels are especially suitable for precise cuts. Another feature is the very varied selection different forms blades.

In addition to the medical sector, the scalpel is also used as a deburring machine in manufacturing plants. While the scalpel blade is optimized for maximum sharpness in the medical field with a very short lifespan, replacement blades for the manufacturing industry are optimized for long life with relatively high sharpness. The material used for the scale knob is usually stable aluminum, partially covered with a soft spatula.

The most popular is a knife with replaceable blades of 25 mm - it is powerful enough and suitable for most jobs. But the blades for a construction knife are 18 mm thinner and will fit only for petty work - sharpening a pencil or cutting off wallpaper.

A construction knife is a useful tool for a wide range of tasks. It can be used to strip the cable from insulation, cut linoleum, wallpaper, carpet or other materials. Of course, in order for the product to serve for a long time, fulfilling all the duties assigned to it, you need to take a responsible approach to the choice.

For medical scalpels, the blades are the same for all manufacturers. Unfortunately, however, you differed from manufacturer to manufacturer in terms of mounting or mounting the knives. Scalpels for industry or hobby areas also have different perforations and, above all, strengths.

The benefits of scalpels

Therefore, you must make sure that these blades fit into your handle. Just send us a photo of your handle and your blade and we will be happy to advise you on the right choice.

The disadvantages of scalpels are

The risk of injury is very high as the blades are very sharp and the knives have no protective mechanics. Heavy cutting work, For example, cutting cardboard boxes cannot be done with a scalpel because the cutting edge breaks too quickly. You bought a toolbox, but you don't know what to put there.

Construction and stationery knives: a competent approach to buying

So, in addition to the price, the main attention should be paid to the following details:

• Design. The Retractable Blade Knife is suitable for a wide variety of jobs that do not put an excessive load on the cutting edge. A fixed blade tool will allow you to tackle dense material without the risk of breaking the blade. Specialized wallpaper knives have a ruler on the body for maximum precision.
• Features of the blade. The thicker the blade, the stronger it is. For products with retractable blades, it is mandatory to have segments that extend the operating period, increase the safety of work.
• Overall quality. The handle should have rubber inserts for ease of operation, preventing the tool from slipping out, the fixing mechanism should hold the blade firmly, gaps are unacceptable. For greater durability, a titanium coating is sometimes applied to the cutting edge, which retains its sharpness for a long time even with constant work with cardboard and other cellulose-based materials.

Construction knives in covers, retractable models - all this in a wide range is presented in the Leroy Merlin network. We work exclusively with the best suppliers, and therefore all products are certified, durable and safe to use. Attentive and qualified sales consultants are always ready to help customers buy the optimal knife model with delivery!

You have some elements to tinker with. But what are the main tools for ownership? Before buying a hammer, make sure you are comfortable when holding it. You will know when you try to hit a 3/4 nail with a 16oz hammer, or press well on your thumb. You will be using it at least once a week. Choose a 25ft tape with metric and imperial measurements. Both are commonly used in construction.

Important when you need to install a storage shelf, place a refrigerator, washing machine, or even a bed. Your square, as its name suggests, will help you place everything correctly. An ego-type wood saw with an 18-inch blade will make the job easier. Choose a combination saw for cutting and tearing. This takes a few shortcuts, but it's easier. Hacksaws, good quality, you will be more than helpful.

A construction knife is an essential tool for builders. This tool can be used at any time and must meet a number of requirements for effective use.

The construction knife consists of a plastic handle and a retractable blade. The blade consists of a certain number of segments, which are removed as needed. They are 9, 18 or 25 mm wide. The blade width is chosen based on the specifics of the work. For example, when working with plasterboard materials, use a knife with the largest blade width.

According to the classification, construction knives are distinguished for:

• cutting bags, wallpaper, elastic coatings, polyethylene;
• cutting wires and cables;
• curly cutting for wood, plastic and paper products.

There are also universal knife models that can be used for any construction works.

Selection criteria for a construction knife

When choosing, you should pay attention to the quality of the metal from which it is made. It is good if the knife blade is covered with a special protective layer - this will prolong its service.

The knife should be sharp, lightweight and compact. When choosing a construction knife, it is important to pay attention to the locking mechanism. It can be of different quality, and it is this element that often breaks. The most popular and relatively reliable is the rolling wheel mechanism. It holds the blade securely. When using it, you need to tighten it literally two turns, since if you squeeze the wheel to fix it, the screw can make dents on the blade, which will subsequently prevent further advancement.

The handle of the knife must be strong, comfortable and non-slip. It is good if there is a special container on the handle where you can store spare blades.

The more expensive a knife is, the more durable it is. It is good if the blade is made of stainless steel. An inexpensive knife is made from cheap material and often breaks at the most inopportune moment.