Screwdriver pulse: description, technical characteristics, reviews

Almost every home master today, not to mention professionals, in the arsenal is a screwdriver. It is available for sale in a wide range, can have different costs, as well as a certain set of functions. This equipment is used to unscrew and screw up screws, screws, and screws.

Not so long ago, such devices were quite expensive, so only companies and enterprises were able to acquire them. Today, manufacturers are developing models that are great for home use, they have a limited set of options, which has a beneficial effect on cost. In the household, the screwdriver does not hurt, it can be used for minor repairs and even construction.

Visiting the store, you can choose for yourself a model that will have unique technical characteristics. A simple consumer can make a choice is quite difficult. To facilitate the task, you need to consider several models in the price segment that you are counting on. First it is necessary to decide which power source should be at the unit. Battery options are convenient because they do not depend on the network, and when working with them you can easily move around the construction site. As for network models, they do not have to be charged, this is their weighty advantage.

There is another classification, which provides for the separation of tools into household and professional. An important role in this matter is played by technical characteristics. For long-term work professional options are calculated. Their nodes will not overheat under long loads, which allows achieving better performance results. The quality data are determined by the strength of the materials, and also by the effective cooling system. Among others, you can find an impulse screwdriver, which is quite popular among professionals and private masters. This tool will be discussed below.

Features of the choice of impulse screwdriver

Quite often, home masters think about what type of screwdriver to choose. If you have a battery and network model in front of you, then you should consider the advantages of each of them. The latter option has high power, provides unlimited working time and does not require recharging. There is also a defect, it is expressed in a binding to the power grid. If we consider a battery impulse screwdriver, it can be noted that among the advantages - the lack of binding to the power grid and the high quality of the battery. The disadvantage is the limited running time, which is limited by the battery charge.

If you decide to prefer a cordless screwdriver, then it's important to choose the battery itself. If before you is a nickel-metal hydride variant, then it is characterized by its serviceability at low temperatures. These batteries have a drawback, it is expressed in the memory effect. If you do not discharge the battery to the end, then its capacity will decrease with time. Nickel-cadmium batteries work well at temperatures below zero, but they also have a memory effect. Among the advantages should be allocated resistance to voltage surges, because these batteries have good internal resistance.

What is a pulse screwdriver?

Many screwdrivers have an impulse mode of operation. It is expressed in the fact that torsion occurs intermittently, tangentially, or by measured jerks. This makes it easier to drill holes on smooth and hard surfaces, because the drill will not go away. With the help of such equipment it will be possible to easily unscrew or screw a screw that has a damaged slot.

Pulsed mode is found not only in screwdrivers, but also in wrench drivers, and also screwdrivers that are specially designed to create a tangential impact. The screwdriver pulse can equally effectively work with nuts and rusty bolts, as well as details of soft materials such as brass.

If we consider the scheme of such devices, then it almost does not differ from standard electric drills. Here there is an engine and a reducer, by means of which the equipment transmits the torque during the process of turning the screws onto the chuck. The same applies to the normal drilling mode. At the moment of increasing the resistance to rotation, the equipment switches to shock-pulse mode automatically, where the impact mechanism is used. The peculiarity of the shock-pulse regime is that by means of frequent and sharp impulses it is possible to reduce the inhibition. The torque thus increases, while the rotation speed of the cartridge decreases.

The screwdriver impulse allows to solve problems of a wide range, thus it is possible to achieve high speed and efficiency of work. But this tool has some drawbacks. They are expressed in high noise, which is especially true for 18-volt screwdrivers, because their operation is accompanied by a rapid rotation of the cartridge. Quite often when choosing a screwdriver, home masters are wondering about what the percussion instrument is different from impulse. The latter was discussed above. As for the shock mode, it differs by rotation with an axial impact, which is similar to a shock drill. With this technique, it is possible to drill more effectively holes in brick, concrete and other building materials.

Device of impulse screwdriver

Now, when you know what distinguishes the impulse screwdriver from the shock, you can consider the device first. The equipment consists of the following units:

• The regulator of turns;
• DC motor;
• planetary reductor;
• battery;
• Load limiting mechanism.

As additional devices serve as a spare battery and a network charger. The engine is made in the form of cylinders, inside the body of which there are permanent magnets. Anchor is located on the bushes-supports, which are made of brass. The anchor itself is based on electrotechnical steel with good magnetic permeability. Windings from insulated wire are placed in the grooves of the armature. After an equal number of turns, the winding goes to the collector plate.

To ensure contact, the brushes are spring-loaded, they are isolated from the motor housing. As soon as you understand what the impulse screwdriver means, you can become more familiar with its device. It provides for a planetary gearbox. This unit is manufactured in a separate housing. The structure includes the following elements:

• Sun gear;
• The ring gear;
• Carrier;
• Satellites.

At the heart of the parts of the reducer may be metal or plastic. To fully understand the operation of the gearbox, the location of the individual parts should be specified. For example, the ring gear has the form of a cylinder inside which the teeth are located. The satellites move along them.

For reference

When buying a screwdriver, if you already have a cordless drill in the arsenal, you can prefer the option with the same batteries. This will allow you to become the owner of a convenient and versatile tool, and also get the opportunity to use the usual power to work with screws. Choosing a screwdriver pulse without a battery, you will pay a lower cost. But about what model to buy, we will talk below.

Description of Impact Screwdriver Hitachi WM14DBL-TL

The above model will cost the customer 23,300 rubles. It is a battery-operated pulse tool, which is used to work with fasteners, as well as drilling holes. The operator will be able to work in one of five modes, namely:

• Screwing;
• Impulse;
• Self-tapping;
• Electronic clutch control;
• Drilling.

The penultimate mode allows to stop the rotation of the motor when a certain torque is reached, five values are given for the choice of the master. This Hitachi impulse screwdriver has an efficient brushless motor that can work 50% longer than brush analogs. You can solve transportation and storage problems with the help of the case that comes with the kit.

Reviews about the model

Considering the features of the screwdriver described above, consumers quite often distinguish a number of advantages, among them:

• Simple replacement of drills and bits;
• 5 modes to choose from;
  Reverse;
• Engine cooling;
• Fastening to the waist.

As for the first feature, it is provided by a hexagon socket, which provides the possibility of replacing the rigging with just one hand. Thanks to this, a smaller weight of the tool and its less impressive length is achieved. This impulse screwdriver, feedback about which you need to help make the right choice, has five modes of operation to choose from. They were discussed above. Between them, according to consumers, you can pretty easily switch, using the wheel next to the battery.

Among other things, the body has a reverse button, with which the operator can unscrew the fasteners and remove the jammed drill bit. The body has ventilation holes that provide effective cooling of the engine. The motor can work much longer without overheating.

Before choosing a good cordless screwdriver, you should pay attention to additional characteristics, among which consumers especially highlight the possibility of attaching to the belt. The model described is equipped with a fastener with which you can hang the instrument in between using it. The customers consider the LED illumination of the working area, the mode of the clutch control, convenient storage and transportation, compact dimensions and light weight, a lithium-ion battery that can be charged without waiting for full discharge. It is impossible not to mention also the effective engine.

Technical characteristics of the model

Before acquiring the described equipment it is important to know not only the device of impulse screwdriver, but also its main technical characteristics. For example, the Hitachi WM14DBL-TL has a battery capacity of 3 Ah. The type of cartridge used is hexagonal. The maximum torque reaches 30 Nm. There is no shock function in this equipment, but there is a reverse option.

The maximum diameter of the screw is equivalent to 4.2 mm. The dimensions of the body are 162x250x31 mm. In the kit, the manufacturer delivers two batteries. The size of the cartridge is 6.35 mm. Among the additional functionality, you should select the option of the engine brake, but there is no spindle lock in the design. The device weighs 1.5 kg. The spindle rotation frequency ranges from 0 to 1100 rpm. The charge time is 0.75 hours.

The equipment can work in one speed. You may also be interested in the diameter of the cartridge, it is 6.35 mm. The maximum drilling diameter in metal and wood is 10 and 21 mm, respectively. This battery impulse screwdriver has a battery whose voltage is 14.4 V.

Description of the impulse screwdriver Makita XST01Z 18V LXT

On sale it is possible to meet the impulse screwdriver Makita model XST01Z 18V LXT. It is a brushless motor with an annual warranty. The design incorporates an oil-pulse technology that uses the viscosity of hydraulic oil, this additionally reduces the noise by 30%. The operator will be able to provide accurate control over the operations performed thanks to the three-speed mode. More productive work is guaranteed by a brushless motor, which extends the life of the engine.

Reviews about the model

The above-described Makita screwdriver does not use carbon brushes in the design, but the battery power is optimized thanks to the electronic control of the motor. For one charge, thanks to this, it is possible to extend the period of its use. Consumers like that the tool provides the ability to switch between three speeds, with beats per minute ranging from 0 to 2700.

Technical characteristics of the model

If you want to choose a good screwdriver, you should pay attention to the model described above. It weighs only 1270 g, which does not give a load on the hands. The size of the drive is 6.35 mm. The torque is equivalent to 40 Nm. Eats equipment from electricity, which allows him to work for a long time.

Description of the battery screwdriver Hitachi WM18DBL

This model will cost the customer 27,600 rubles. It is designed for drilling holes and working with fasteners. In operation, the instrument does not emit very much noise, which is kept at 68 dB. The unit operates at the expense of a brushless motor.

The design allows you to quickly replace the snap, which is provided with just one hand. This model is not much different from Hitachi WM14DBL-TL, which was discussed above. However, in this version, the battery voltage is 18 V. In all other cases, the spindle rotation frequency varies up to 1100 rpm. Two batteries are supplied. The size of the cartridge is 6.35 mm. The motor brake option is available in the design. Hanging this screwdriver 18 volts, the price was mentioned above and is acceptable for most consumers, weight - 1.5 kg. The beat rate per minute reaches 1090. The diameter of the cartridge is equivalent to 6.35 mm.

Description of the impulse screwdriver Metabo BS 18 LTX Impuls

This screwdriver pulse Metabo costs 13,400 r. It is able to work in several modes. With the help of equipment, you can solve many complex tasks, for example:

• Drill steel pipes;
• Screw out and screw in long screws;
• Drill a ceramic tile.

In order to increase the service life, a special battery manufacturing technology was used in the manufacturing process. The device operates at 2 speeds, one of which provides compliance to speeds of up to 500 rpm, while the other is 2700 rpm. This screwdriver 18 volt, the price of which is acceptable and has already been named, weighs only 2 kg. The kit comes with a side handle, a suitcase with an insert, a holder for attaching to the belt, and a quick-action chuck.

Conclusion

It is often enough to install lithium-ion batteries in impulse screwdrivers. They have the highest power and no memory effect. However, they have one important drawback, which is expressed in poor performance at low temperatures. For Russia, this factor is very important, so many consumers refuse to purchase cordless screwdrivers.