Reinforcing scissors (they are also bolt cutters) are a pliers tool. Designed for cutting iron rods with different diameters, cables and wires, pipes and studs, bolts and other types of fasteners with a hexagonal, round or square section, made on the basis of steel or other metal. During operation, their levers-handles are driven by human muscle power or hydraulics, and they transfer pressure to their cutting parts - heads or sponges. This design allows you to cut rather thick objects with only small efforts. The work of the jaws provides the future place of the cut with proper evenness and cleanliness, which is important, for example, for bolted fasteners.
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The principle of operation of the device in question is the implementation of the double lever mechanism. Structurally, any such tool consists of two sponge blades, one of which has a sharp sharpening, and the other is slightly blunt. An object for cutting is installed between these sponges, and when exposed to long working levers, it is bitten.
Bolt cutters can be used in a wide range of work areas. Most often, they are an indispensable device in the arsenal of rescuers during rescue operations, since they are useful for cleaning and unblocking blockages / passages.
All reinforcing scissors can be divided into two main types:
The considered type of devices is widely used in the following areas:
In most cases, they will depend on the size of the tool, namely, on the size of its handles (especially true for mechanical models). On the other hand, the very design and shape of the sponge-blades will also play an important role. The likelihood of being able to cut a large object or an object made of reinforced material can also be increased by using replaceable blades - this option for improving the tool is considered the most reliable.Replacement jaws are available for both mechanical and hydraulic models and come in the following types:
Depending on the design and location of all working elements, as well as on the source of the driving force, the type of tool in question is divided into four types.
This sample is held directly in the hands of the operator and is driven by his muscular strength. In this case, one handle is constantly in a static position, and the second works as a lever and builds up pressure. The applied force is always applied in steps, not all at once. Accordingly, by applying several small pressures instead of one long one, it is possible to significantly facilitate the work process and reduce the percentage of effort required from the operator.Therefore, a manual bolt cutter can be easily used by a person who does not even have great physical strength. However, this type of reinforcing shears is characterized by a significant loss in the speed of operations.
They differ from each other in the design of the cutting jaws. In the scissor variation, they are made in the form of open blades (exactly like standard wire cutters), while one blade is always stationary, and the second is driven by the cylinder rod. This design is typical for mechanical devices. In the guillotine design, the cutting part is represented by a truncated geometry knife, which moves towards the second pointed knife during operation. Both jaws are slightly offset relative to each other, and this allows you to cut even thick objects made of carbon steel with extreme efficiency. The guillotine design is more suitable for industrial bolt cutters.
In these devices, in the hydraulic cylinder, the pressure is formed not by the muscular strength of the operator, but by means of a special pump, which gradually presses on the working fluid. The pump is powered by an electric motor, which is also located on the body of the device. Depending on the thickness of the object to be cut, electro-hydraulic shears can be sized accordingly. From this it is clear that the more powerful the motor of the unit, the greater the thickness the tool itself can handle. These samples, with their medium-sized variations, are deservedly considered universal and serve equally well for both domestic and industrial purposes.
These are the largest devices among those considered.However, their cutting part may not be very large, but the power hydraulic cylinder is necessarily an impressive part of the whole structure. It is equipped with a special sleeve connected to an external pump, which will provide maximum pressing force when making a cut. It is this circumstance that allows the tool to bite even the thickest objects.
Only a grinder (“grinder”) can compete in performance with hydraulic shears, and even then only its specialized versions. Therefore, it is simply impossible to talk about rivalry in this regard between hydraulic bolt cutters and mechanical ones. Moreover, hydraulic models have several particularly important advantages:
Speaking of mechanical bolt cutters, we can note their following "cons":
In principle, the type of tool in question does not belong to the category of devices that pose an increased danger to the operator during work. However, it is still necessary to follow some immutable rules that will ensure both the safety and efficiency of all working manipulations:
Before buying a bolt cutter, you should carefully examine all the technical parameters and capabilities of the model you like. You should also take care of the following nuances:
The model serves both for cutting bolts and for cutting reinforcement with a diameter of 4 to 12 mm. The cut occurs with a force of 5 tons. The tool is equipped with a manual pressure release valve that resets the blades. The tool is supplied in a plastic case. Net weight, kg - 2.3, blade hardness HRC - 52…54. There is a backlash-free fit of the blades, a manual pressure relief valve, a reinforced C-shaped working head.The recommended cost for retail chains is 5870 rubles.
The tool allows you to easily cut bolts and bars with a diameter of up to 16 mm using a pressure of 8 tons. The compact and robust instrument is equipped with a manual pressure relief valve. The bolt cutter comes with a plastic case and cutting blades installed in the tool. Blade hardness is HRC 52…54. There is a backlash-free fit of the blades and a reinforced C-shaped working head. The recommended cost for retail chains is 9800 rubles.
The device is designed for cutting bolts and steel fittings with a diameter of 4-22 mm. The maximum cutting force is 12 tons, the tool has a special valve to relieve pressure. The working reinforced part is made in a C-shape. Bolt cutter with backlash-free blades. The cutting blades are made of tool steel. Handles are dressed in rubber covers. The total weight is 4.9 kilograms with a total length of 490 millimeters. The recommended cost for retail chains is 10,900 rubles.
The sample is characterized by a high level of safety during operation. It has durable replaceable knives, which are made of high hardness steel. The tool is completely autonomous. Due to its compactness and low weight, it is convenient to use it in hard-to-reach places of work. The working head is made in the shape of the letter “C”. It is used for cutting reinforcing steel bars, steel bars of square, round, hexagonal section, as well as products made of other high-strength materials. The recommended cost for retail chains is 13,500 rubles.
This is a reliable professional tool for cutting non-hardened bolts, steel and metal bars with a diameter of up to 3.5 mm, and hardened ones with a diameter of up to 2 mm. The jaws are made from chrome vanadium steel and are high frequency hardened for increased strength and wear resistance. Ergonomically shaped one-component handles fit comfortably in the hand and do not slip. Length - 200 millimeters, weight - 320 grams. The recommended cost for retail chains is 720 rubles.
The device is used for cutting all kinds of bolts, studs, wire, the diameter of which does not exceed 8 mm. This bolt cutter is made of high-strength steel, and the cutting edges are made of a special alloy, which increases the service life of the tool. It easily works on ordinary steel, hardened steel and various carbide materials. The recommended cost for retail chains is 1050 rubles.
This sample is designed for cutting metal and steel bars, including hardened ones. It is made of high quality chrome vanadium steel, meets the highest technical requirements, and the phosphated coating protects the device from corrosion. It has an increased resource and provides long-term and high-quality work. Hardening the jaws with high frequency currents indicates a long tool life. The high-power double-lever mechanism of handles increases force of a cut. Weight is 290 grams, length - 200 millimeters. The recommended cost for retail chains is 1420 rubles.
This professional and reliable tool for cutting metal and steel bars, including hardened ones. The jaws are made of high quality tool steel and hardened by high frequency currents.They can cut non-hardened wire with a thickness of up to 23 mm, and hardened wire - up to 12 mm. The total length of the device is 1050 mm, the material of the jaws is steel grade T8, the handles are one-component. The recommended cost for retail chains is 3560 rubles.
A good master should have many different useful tools in his arsenal. One of them is a bolt cutter, which is represented by different types of variations. In order for the tool to meet the stated requirements, it is important to choose the right model, depending on the conditions for its further operation. The durability of the device will be ensured by competent work with it and proper storage conditions.