If you are a tinkerer, then you probably have a screwdriver in your arsenal, the price and quality of which suits you. If not, then you are one of those who are just about to make a bargain. Without this tool will not do when carrying out repairs or during construction work. Such equipment is perfect for solving any household problems. However, initially it is necessary to determine the main selection criteria, which will be discussed below. Some consumers carefully study reviews before buying a particular product, because it is they who sometimes force them to make the right purchase. If the choice is made correctly, then spare parts for a screwdriver will not need to be purchased during the entire service life.
Model selection by speed and torque
It is important to study the rating well before visiting the store. At the same time, a screwdriver can be selected based on feedback from experienced craftsmen. Experts advise to take into account the speed of rotation and torque. The last parameter will determine how much forceattaches the tool when wrapping fasteners. This characteristic also indicates the force with which the equipment resists the load.
If you want to choose a tool for solving everyday problems, then the torque should vary from 10 to 15 newton meters. Professionals choose equipment with a torque limit of 135 Nm. As a result, craftsmen get the opportunity to work with hard materials. The motor shaft of such a device will be able to complete 1300 revolutions in one minute.
If we are talking about household models, you will have to be content with 500 rpm. It is important to consider the rating before visiting the store. The screwdriver you choose based on consumer recommendations will meet all requirements. Depending on the torque, the length of the fastener, as well as its diameter, should be selected. If we compare a screwdriver with other electric tools, then we should highlight the possibility of adjusting the torque, for which a limiter is used. This addition is represented by a ring located after the chuck. As soon as the master overcomes the effort, after which the screw will no longer enter the wall, he will hear the characteristic sound of a ratchet. Such a restriction will protect the tool from breaking the slot, wear of the bit and deep recession of fasteners into the surface.
Model selection depending on power supply
There is a cordless screwdriver and a mains powered tool. The latter hasan impressive mass, and you can work with them without moving far from an electrical outlet. For those who like not to depend on the battery charge, it is proposed to purchase an additional extension cord, the footage of which will determine the range of use of the tool. Devices with batteries weigh less, but you can work with them for a very limited time. Consumers who choose a cordless screwdriver appreciate autonomy. If you often have to do construction work in the field, then the battery model will be more convenient.
Selecting a model by battery
Consumers who choose convenience over having to recharge their tools every half hour are serious about choosing batteries. The latter come in three varieties, the first being NiMH batteries, the second being Lithium Ion, and the third being Nickel Cadmium devices.
When to choose a nickel-metal hydride screwdriver
The screwdrivers can be powered by a Ni-MH battery. They have become more common in recent years, as European models are equipped with them. They are environmentally friendly, light weight and small in size. Spare parts for the screwdriver will be available at the service workshop, as well as the battery. The main advantage of the aforementioned batteries is the absence of the memory effect, but there are also disadvantages. It is important to remember thatsuch batteries do not like overcurrent and exposure to low temperatures. A device powered by this battery will cost more, but the number of recharges in this case is 1500. If you need to store the battery for a long time, you should charge it, and leave it in a discharged state is unacceptable.
When to choose a nickel-cadmium screwdriver
If you want to choose a good cordless screwdriver, it is important to remember that the aforementioned battery is more toxic, but it has twice the number of recharges. The cost of tools based on nickel-cadmium cells is somewhat lower; batteries of this type are not afraid of frost at all. That is why they are the best fit for Russian conditions. But these batteries are characterized by strong self-discharge and memory effect, which can be called significant disadvantages.
When to choose a lithium-ion battery
The consumer who wants to choose a quality instrument reads the rating beforehand. In this case, a screwdriver can be purchased at an affordable cost and with outstanding characteristics. For example, lithium-ion batteries are not as common in screwdrivers. They are characterized by maximum sensitivity to cold, and their power is low. The master can count on 3000 recharges, there is no memory effect in such a battery. Do not be surprised that the equipment will havehigh cost, which is not compensated even by an impressive capacity. Such batteries are almost not subject to self-discharge, which is why it is convenient to use them at home when you have to use the tool often.
Rating of popular models
Professionals and hobbyists are increasingly choosing Makita products today. Screwdrivers are no exception. As an excellent example, we can highlight the DDF343SHE model, the cost of which is 8900 rubles. The tool is equipped with a keyless chuck, as well as a drill function. The master will be able to work in one of two speeds. At idle, the equipment is capable of delivering 1300 rpm. The torque of the model is 36 Nm. When choosing a screwdriver, the price of which should be affordable, you can prefer Hyundai, among its models it is worth highlighting the A1220Li, the price of which is 5500 rubles. It will be possible to work in one mode - drilling, but at the same time use one of two speeds. The maximum number of revolutions at idle is 1100 per minute. The maximum torque is equivalent to 28 Nm.
Combination of good quality and affordable price
Experts advise to be sure to consider the rating. The screwdriver you choose will have the characteristics you need. In the market for related products, you can find the Hammerflex ACD182 model. You will have to pay 4500 rubles for it. The device is equipped with a keyless chuck, and you can work in one of 2 modes, namely drilling and screwdriving. Maximum numberidle speed for this tool is 1200 per minute. This cordless screwdriver has a maximum torque of 22 Nm.
