Today, almost any construction work involves the installation of fasteners. Twisting such elements in manual mode will require a lot of time and effort from a person. However, if you use a modern tool called a screwdriver, then such a process will be greatly simplified, and all the necessary operations will be performed better and faster. The only question that a person needs to solve is which unit to choose for this and what technical characteristics should it have? Since this article is more focused on considering the technical characteristics of professional devices, household models will be mentioned in it only for comparison.
Content
The unit used by real craftsmen in everyday work must be able to perform the following operations:
In principle, it is possible to learn about the capabilities of a particular unit from the instructions, where the above capabilities can be directly indicated by the manufacturer, or it is allowed to draw conclusions about them based only on technical specifications.
Depending on the intended purpose, the units in question are divided into household and professional models.The latter are distinguished by the fact that they use more complex designs of mechanisms and components, which directly affects the operational life of the permanent use of the device. However, it is impossible to visually determine whether a particular model belongs to the category of professional ones, therefore, there are a number of parameters, based on which it is easy to make a completely confident choice. These include:
IMPORTANT! Before purchasing an expert-level model, it is best to hold it yourself in your hands, as it may be too heavy, which will subsequently affect the quality of the work performed.
Professional builders who use professional screwdrivers in their daily activities often disagree on which technical parameter should necessarily belong to the “master-professional-expert” level. Therefore, they should be considered in more detail.
Depending on the power source, the devices are divided into battery and mains. The latter receive power from the mains via an electric cable and are considered more efficient, since power is permanently maintained in them, i.e. there is no need for the operator to monitor the battery charge level. However, the radius of their actual use will naturally be limited by the length of the electrical cord and, in general, by the possibility of connecting to a 220 V network.It is also worth mentioning that they are powered by a voltage level with increased danger and carry additional fire risks in case of network overload. The same cannot be said about battery devices, because they are powered by low voltage.
At the same time, battery models are particularly mobile, they can be easily used in places where there is no mains power as a given or where you carry a bulky tool (and even constantly monitor the cord so that it does not get tangled) seems possible. Samples powered by rechargeable batteries are quite small in weight and relatively small in size, however, they are very expensive and can be discharged rather quickly. Therefore, such "expert" class units must have a reliable battery type and increased capacity.
The type of battery determines the most important characteristic - this is the duration of the device. This also includes the requirement for a complete discharge of the battery, the duration of its re-charge, the number of possible charge / discharge cycles, and the cost of the screwdriver itself.
The following types of batteries are used in modern devices:
From all of the above, we can draw a definite conclusion that in models of the “pro” level it is better to use lithium-ion or lithium-polymer batteries.
According to the type of motor used, the units in question are divided into brush (collector) and brushless (inverter).
Masters in the field of construction almost unanimously agree that it is preferable to use inverter models for serious work. There are several reasons for this:
And yet they have a significant drawback - this is an extremely high price, therefore, such models are recommended only for professional activities, where the issue of saving battery charge and the absence of a decrease in performance during prolonged use will be relevant. Again, for domestic purposes, the acquisition of such a system will become economically impractical.
The power level for a given building tool will directly determine its ability to drill various holes, tighten self-tapping screws, or disassemble mounted structures. By itself, the power of the screwdriver motor is the sum of the voltage value multiplied by the current value in the winding. For devices powered by the mains, the voltage is known by definition - it is 220 V. These units can perform almost any job.
Regarding battery options, they are designed for 3-6-10-15-18-36 Volts of voltage. Thus, the higher the voltage is selected, the more power the screwdriver will have.
As mentioned above, this parameter is measured in Newtons per meter. Thus, based on the magnitude of the torque, the device will be able to drill through a wood base, thin metal, or simply tighten loose fasteners. Professional samples must have the above figure of at least 130 Nm. However, a much more efficient option would be to work with a device that has a special handle for self-adjusting the torque.
When selecting the rotation speed, it is necessary to focus on the following indicators:
There are three types in total:
Naturally, the main modes of operation for the unit in question is unscrewing / tightening fasteners. However, professional samples may have additional options:
The presence of the reverse function on the device will allow you to rotate the screwdriver in the opposite direction. This function is necessary when working with variable thread directions and in cases where normal rotation is not effective. The reverse will also allow you to loosen / unscrew the already twisted fasteners.Such a function will be extremely useful when assembling / disassembling furniture, various large-sized appliances, etc.
Professionals advise holding the tool you like in your hands before buying - its handle should be comfortably placed in the palm of your hand. This is especially important in relation to professional samples, because when working with an uncomfortable handle for a long time, you can easily burn your palms. You also need to pay attention to the balance - if you do not intend to use the tool with one hand, then it is desirable for such a device to have an elongated "forearm". In order to increase ergonomics, the handle can have rubberized pads, so it will slip less when working.
Today's market has many manufacturers of screwdrivers. But there are separate brands that can be trusted even without any reservations. These include:
The sample is equipped with many additional options, its handle is made using ergonomic technology, which does not allow the hand to tire quickly during operation. Differs in high-quality assembly, overheats minimally. The set includes a convenient carrying case.
Name | Index |
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Producing country | Germany |
Weight, kg | 1.6 |
Battery capacity, amp/hour | 2 |
Rotation speed, rpm | 1700 |
Price, rub | 8600 |
Very comfortable model for everyday work. The handle is completely covered with rubber, not one-time inserts. This sample is distinguished by an extra long service life. Equipped with an extremely efficient brushless motor. Of the additional accessories, it is worth talking about a convenient magnetic holder, where a small number of self-tapping screws / screws are perfectly attached.
Name | Index |
---|---|
Producing country | USA |
Weight, kg | 1.5 |
Battery capacity, amp/hour | 1.8 |
Rotation speed, rpm | 2000 |
Price, rub | 11500 |
A reliable device designed specifically for professional experts. The rotation speed can be adjusted by pressing the trigger hard, the body has a step switch. It is convenient for long-term work on outstretched arms due to its ultra-light weight. The design includes a motor brake in its inverter variation.
Name | Index |
---|---|
Producing country | China |
Weight, kg | 1.2 |
Battery capacity, amp/hour | 1.8 |
Rotation speed, rpm | 1850 |
Price, rub | 9400 |
Full-weight screwdriver, specially oriented to work of increased complexity. The handle has an increased length, which gives additional comfort when drilling hard materials.The chuck is installed with a quick-clamping, allows you to integrate drills on a cylindrical shank. There are many additional features.
Name | Index |
---|---|
Producing country | Japan |
Weight, kg | 2.7 |
Battery capacity, amp/hour | 1.8 |
Rotation speed, rpm | 2100 |
Price, rub | 15000 |
Extremely comfortable model, with all its power having a low weight. The back side of the handle is covered with special rubber inserts that provide a comfortable grip. It has a hexagonal chuck and LED backlight. Designed for use in hard-to-reach places and for furniture assembly.
Name | Index |
---|---|
Producing country | Japan |
Weight, kg | 1.4 |
Wire length, m | 4 |
Rotation speed, rpm | 6000 |
Price, rub | 8100 |
The screwdriver is equipped with a hardness adjustment in 23 steps, fasteners are screwed in at a rate of 45 Nm. Perfect for drywall installation and for drilling thin metal. The brushes are easily replaceable with special maintenance keys. The design has a special comfortable T-shaped model.
Name | Index |
---|---|
Producing country | Germany |
Weight, kg | 1.9 |
Wire length, m | 4 |
Rotation speed, rpm | 1500 |
Price, rub | 4500 |
This unit uses the latest innovative technologies of the country of the Rising Sun: economical power consumption, rotation adjustment occurs both smoothly and stepwise, with prolonged drilling it is possible to block the start key. A keyless chuck is installed, the unit itself can be used as a drill.
Name | Index |
---|---|
Producing country | Japan |
Weight, kg | 1.2 |
Wire length, m | 2.5 |
Rotation speed, rpm | 1500 |
Price, rub | 5000 |
The Russian representative of the “expert-master” segment is positioned completely as a drill driver and is suitable for frequent use. Works great with delicate materials, does not expose their surface to excessive destruction. The best representative of the domestic market in the price-quality ratio class.
Name | Index |
---|---|
Producing country | Russia |
Weight, kg | 1.24 |
Wire length, m | 3 |
Rotation speed, rpm | 2500 |
Price, rub | 3000 |
Based on the facts presented in this article, we can conclude that choosing a professional screwdriver is not so difficult. The most important thing is to decide for which front of work you need a tool. And then, it is already possible to choose a tool to your liking, based on functionality, quality and comfort.You need to do the same with other characteristics: type of power supply, power-voltage and battery type, torque, cartridge and manufacturer. You just have to pay attention to all the little things!