Any man has to face in everyday life with the need to screw up screws, tighten the nuts, assemble furniture. Manually it's done long enough. If screws or screws are required to screw a fair amount, there is a desire to facilitate your work. And then a screwdriver comes to the rescue. About what kind of screwdriver is better to buy for the house, and we'll talk.
Professional and household - the main differences
To any technique bearing the proud title of "professional", consumers have more confidence. Screwdrivers are no exception. Having bought such a model, you can be sure that it will serve for a long time, performing all the functions assigned to it. Only the price of a professional tool strongly "bites", and not all the characteristics that it possesses are necessary in everyday life.
For example, the torque for professional screwdrivers is 130 Nm, for household screwdrivers - 15 Nm. But for tightening nuts, screws and screws, 10-15 Nm is enough. Therefore, deciding which screwdriver to choose for the assembly of furniture, it is reasonable to dwell on the model of household type.
Another difference between professional tools is a powerful and fast charger, in which the batteries are charged for no more than an hour. Determining with which battery to choose a screwdriver, see for yourself what is more important - time or cost savings. In principle, for many not so significant are 3 or 5 hours of waiting, while charging a normal amateur screwdriver.
What you need to know about batteries
When choosing which battery is best for a screwdriver, you need to know that they are of three types.
- Nickel-cadmium battery is a thing of the past, as it contains cadmium - a toxic and allergenic substance. But on sale it is often possible to meet screwdrivers with such batteries. They are able to withstand 1000 charges and tolerate the cold well. Their minus is a decrease in capacity at each charge( memory effect).
- Nickel metal hydride battery is the lightest, but can charge and discharge only 500 times.
- Lithium-ion battery is the most powerful, reliable and durable, but it is afraid of low temperatures. He has no memory effect.
Thinking about what kind of cordless screwdriver to choose, look for a model with a spare battery. After all, the cost of a new battery is half the cost of the device. Some models are designed to work with both metal hydride and nickel-cadmium elements, which is very convenient.
Perhaps it makes sense to work from the network?
A tool that can be easily transferred without getting tangled in wires is very convenient. But there are drawbacks to it - for a long time without any storage, the batteries gradually fail. Therefore, deciding which one to buy a cordless screwdriver, sometimes the home master comes to a completely different solution - to acquire a tool that works from the network.
This technique is noticeably heavier and is not as mobile as the one that works on batteries. But there will be no problems with their charging and storage. To repair the length of the cord is quite enough, and the extensions are now a great choice. True, the cost of such a tool is slightly higher. However, today network screwdrivers can be chosen in any price category.
About the torque and shaft speed
To ensure that the engine does not fail, the couplers have a ratchet that allows the shaft to slip when the load threshold is exceeded. This threshold is called the maximum torque. To tighten tight screws, this value is within 5-10 Nm. And what screwdriver is chosen, if it is necessary to drill holes? The answer is simple - buy a drill-screwdriver with high torque.
Speaking about which screwdrivers are the best, it should be noted that a good device has a torque limiter. This ring is located behind the cartridge. It does not allow the nozzle to wear out, but the screw - to go deep. The number of steps to adjust the limiter can be from 5 to 22. The more they are, the better.
Considering the speed of rotation of the shaft, we recall that it is quite comfortable to screw the fasteners at a speed of 400 or 500 rpm. If drilling is to be done, the shaft must move faster - at speeds up to 1300 rpm. It is good if the speed is adjustable.
Ease of use and integration
Determining what type of screwdriver to buy, it makes sense to attract the model to pick up, trying on how it lies in the palm of your hand. Switches with keys should be comfortably pressed, and the center of gravity - located in the handle. In construction shops, there is often a test stand, on which you can try out a tool, drill a hole, tightening the screw, making the final choice.
When considering which screwdriver is better equipped, you should take one that has two batteries and a large number of attachments. A flashlight is needed if the instrument works on nickel-cadmium batteries. Practically, when the instrument is sold in a suitcase - there you can store all the nozzles and a spare battery.
When buying a tool, one of the decisive moments will be the availability of a certificate and all necessary documents, including a guarantee - after all, a lot of counterfeit is sold.
We choose the manufacturer: a screwdriver of which firm is better than
The market now offers such a variety of tools that an inexperienced person runs away. Looking at the window in the building supermarket, dotted with bright suitcases, he painfully decides which brand is better to buy a screwdriver.
Deservedly popular are the companies Bosch, Makita, Hitachi. They determine the top three in terms of quality and durability of the products. However, in this case it is necessary to overpay for the brand, but you will not regret your choice - the tool will be convenient and will last for many years.
If you choose a device exclusively for the home, for example, for repairs, deciding which is better to buy a screwdriver, you can stay on less powerful models. A good choice will be the technique of the large American company Black & Decker. If a well-known brand is not very important, the screwdriver of Interskol company is quite suitable.
Making conclusions
So, we decided which screwdriver to choose for domestic needs.
- We buy a model of a reliable company, network or with a spare battery in the kit.
- Screwdriver must have a torque limiter with the possibility of adjusting it.
- If in plans drilling holes in solid material, we take a drill-screwdriver with high torque and speed change.
