We disassemble the features of different types of screwdrivers and tell you what to pay attention to when choosing: power, convenience and other important details.
Sculptors are applied everywhere: from the assembly of furniture in the living room and to a small car repairman in the garage. It is not surprising that many of their varieties appeared - to solve various tasks. We understand the article, which screwdriver will need to work for you.
Varieties of screwdrivers
Rechargeable screwdriver
It is usually equipped with a built-in non-replaceable battery 3.6 V and a socket for nozzles-bits with a hexagon shank. The main advantage of the tool is its compactness and a small weight (200-300 g), and the disadvantage - the absence of adjustment of the speed of rotation.Screwdriver with the function of the shock and unstressed drill
The drill is characterized by a higher speed of spindle rotation. Therefore, such screws are equipped with a rotational speed switching mechanism (two speeds). Shock drills-screwdrivers are with axial impact (for drilling stone) and with tangential (for the development of great efforts).
Compact impact drill-screwdriver Easyimpact 12 (Bosch).
Battery drill-screwdriver series Universaldrill 18 (Bosch).
Battery drill-screwdriver series Universaldrill 18 (Bosch).
Angle replaceable nozzle for BBS12C2 (AEG) drill (AEG).
Cutting shift nozzle for BBS12C2 (AEG) drill (AEG).
Rifles, wrench
This is usually a professional technique. They are used with interchangeable end heads to work with bolts and nuts and are distinguished by the highest maximum torque.
Powerful pulse rifle, model 24V GD24ID (GreenWorks), 24 V, 327 nm.
Powerful pulse rifle, model R18IDBL (RYOBI) with brushless engine, 18 V, 270 nm.
Selection parameters
1. Battery
The absolute majority of screwdrivers refers to battery models, in contrast, say, from drills, which most of them work from the network. Fortunately, modern accumulators have sufficient capacity to ensure uninterrupted mechanization of monotonous and tedious labor at a fairly intensive loading. Even the capacity 2 A • h makes it possible to screw and twist up to several hundred fairly large self-tapping screws (for example, 6 by 60 mm). Of course, a lot depends on the hardness of wood, and from the state of the tool itself - but, as practice shows, a set of 1.5-2 a • h, most masters in everyday life, it turns out to be quite enough to work without downtime. However, if you are planning to work with large loads (for example, with self-strains of 140-152 mm long), then you will need a powerful tool with a large torque that is more expensive. If an inexpensive screwdriver with one battery with a capacity of about 1.5 and h in the kit can be purchased for 2-3 thousand rubles, then a model with two batteries 2-3 A • C will cost 6-8 thousand rubles.
Lithium-ion batteries (Li-Ion) are characterized by a high energy intensity, lack of self-discharge and memory effect. The advantage of nickel-cadmium (Ni-CD) is the possibility of their work in the frost (-15-20 ° C). It is advisable to choose models to which it is easy to choose a replacement battery. In addition, many manufacturers - Bosch, Makita, Ryobi, Interskol, etc. - produce rules of power tools with identical batteries. You can buy a battery tool and save 30-50% of the cost.
Features of the design to which you want to pay attention to: 24 torque adjustment positions allow you to gently twist any screws.
Comfortable rubberized handle with a triggene-type launcher.
Bit fastening options: Clip under the bits of ¼ inches.
Flexible cam cartridge.
Screwdriver with a nickel-cadmium battery, model Dexter, in a set of pair of battery with a voltage of 12 V and a capacity of 1.3 A • h (1 900 rubles).
Screwdriver with nickel-cadmium battery, screwdriver 12 V (China), one acb (576 rubles).
2. Bits
Often, manufacturers of tools offer homemade masters. Whole sets of bits with the most exotic tips. But in practice, these sets are rarely used at least 30%. Most often bits of three types are required: for hardware (i.e., screws, screws, screws, etc.) with a direct flat slot and for two varieties of a cross-shaped slot (Philips and Posidriv). Each type of hardware is presented in several sizes. There are usually hardware with cruciform Slots PH1, PH2, PZ1, PZ2. And it is precisely such bits must be at your disposal. It is better not to save on them and get high-quality bits, say Bosch, Milwaukee, Makita from high strength steel, - Bits themselves are relatively inexpensive, and it will be much more pleasant to work with them than with Chinese bits no name. And do not confuse the philips and Posidriv slots: each you need to use only his bits, otherwise the risk of ripping the slot or damage the bit, if it is not durable.
Pick the right bit with the desired type and the size of the slot fastener, otherwise you risk spend in vain strength and spoil both fasteners and bit
Two-speed drill screw, with invincible patron, Li-ion battery and LED backlit, model Ryobi R18DD2-0, Akb 18 V.
Two-speed drill-screw, with invincible patron, Li-ion battery and led-illumination, model Da-14,4.R (Interskol), AKB 14.4 V.
| View of the Slice | Marking | Size (Slot Length), mm | |||||
| 1.5 | 2. | 3. | 4.5 | 6. | eight | ||
| Philips. | PH | P000 | PH00. | PH0. | P1 | Ph2. | Ph3. |
| Posidriv | Pz. | Pz000 | Pz00 | Pz0. | PZ1 | PZ2. | PZ3 |
3. Power
The main criterion for the power capabilities of the screwdriver is its maximum torque, measured in N • m. Models in which this indicator is less than 15 n • m, can be attributed to relatively low-power. With the twist of the same 152-mm screws, they are unlikely to cope. The most versatile and popular models have a maximum torque of 25 = 40 N • m. And for work requiring a particularly high load, models are produced with a maximum rotation torque of 80-100 N • m and more. They can already be used when replacing automotive wheels and unscrewing tightly "accurate" nuts. For comparison: the moment of rotation of the brushless rechargeable screw R18IDBL-0 (RYOBI) - 270 N • m. The pneumatic wrench in the auto repair point of rotation is 300-500 N • m.
The battery voltage does not determine its maximum power (some mistakenly think that "the more Volt, the stronger the screwdriver"). It depends on the amount of energy with a sparkling battery (the capacity affects the energy is directly proportional, and the voltage is in quadratic dependence) and the operating time (more voltage, longer will work). But to get all the energy stored in the battery will not instantly. Usually, the larger capacity batteries are capable of paying a larger current.
When drilling with small diameters, it is more efficient to work with a tool that develops high speed (up to 3000-4000 rpm), and large - with a small one.
4. Ease of use
A screwdriver often has to use, holding it in an uncomfortable position for a long time. Therefore, it is desirable that the device is, if possible, convenient, compact and lig. The handle of the pistol type should be equipped with non-slip overlays of thermoelastoplast (TEP), which looks like rubber, and lying well in hand; The tool must be balanced so that it does not have to strain the brush hand, holding it into equilibrium. The switching buttons and reverses must be large so that they can be pressed, without removing gloves.
Choosing a tool, take into account its weight, because often during work has to hold it on the elongated hands or above your head.
5. other important functions
- Charge level indicator. It helps the user better navigate and charge batteries in time.
- Cartridge. The tool can be equipped with a quick-swing cam cartridge either with a clamp under the bits of ¼ in. Neh (quarter-to-hexagon). Quick-insulated cartridges are needed for the installation of rolled, so you need to choose a model with a similar modification of the cartridge as a universal.
Also, to unscrew the problem nuts and rusted bolts, a tool with a tangential impact mechanism is well suited (sometimes its work is called "pulse mode"). Due to this mechanism, for example, a screwdriver with a moment of 20 n • M develops an effort similar to the force of the device with the moment of rotation of 90-100 N • m.
LED backlight will help when working in the evening or indoors without light; Some models are so powerful that they can be used as improvised flashlights.
Work in insufficient space
A serious problem can be the need to complete the screw or self-tapping screw to the point located close to the joint of two planes (for example, the floor and walls). For most screws, an indentation of the junction is required at least 2-3 cm than a massive tool, the more an indent is needed. Typically, such self-tapping screws have to wrap a manual scolder. There are also special nozzles that allow you to get close to the junction.
Another problem is often a narrow gap (less than 25 cm wide) between two planes. In a similar situation, a compact rechargeable rehabillet can help. In addition, many manufacturers switch to the production of more convenient models with a shortened base. Also, for such a situation, special angular drills - screwdrivers have been developed. Most of them relate to professional techniques and costs 8-15 thousand rubles, but it can be found on sale and less expensive models, such as angular drill-screwdriver Ryobi RAD1801M worth 4 thousand rubles. You can also take advantage of a special corner nozzle, which is fixed into cam cartridge. It is worth a similar adaptation of 1-3 thousand rubles.
BS12C2 (AEG) drill (AEG) can be equipped with different nozzles, including a corner to work in a limited space.
The editorial board thanks Bosch, Interskol, "And End M Power Tools", Leroy Merlin, Greenworks for help in the preparation of material.