If you at least once rubbed the corn with a screwdriver, unscrewing the rusty screw or twisting the screws into the plinth, then you know how much useful to have your own screwdriver. To figure out what a screwdriver you need and how to choose it, we suggest you read our article.
How to choose a screw-in battery-household or for the pro?
Decide in advance what kinds of construction work and repair are planning to do. And already taking into account this, continue to choose. If you are not too interested in construction and you will get the device just a couple of times a month, then there is no point to buy a professional tool. It makes no sense to spend huge money, you will have enough ordinary amateur model that works from the battery. They have all the necessary functions, and they weigh several times less than professional.
If you are going to collect something every day and repair, build and fasten, pay attention to expensive and professional models. Almost all of them work from the network, possess large dimensions and weight. Such screwdrivers should be purchased only with the lack of work with large loads.
How to choose a screwdriver battery - batteries
This is the most important criterion when choosing. It is now used 3 types of batteries: 1 - NiCD (nickel-cadmium), 2- NIMH (nickel-metal-hydride) and 3 - Li-ion (lithium-ion).
Nickel-cadmium batteries
We are in demand only because of the price available.
Advantages:
- low price;
- the possibility of recovery after long-term not use;
- the ability is stored even in a discharged state;
- frost resistance.
disadvantages
- small specific container that does not exceed 2 hour;
- high self-discharge - put a fully charged battery for a week in the suitcase, got, and it is already discharged;
- small lifetime (about 1000 charging cycles);
- the effect of memory - can only be charged after 100% discharge, otherwise its container will fall at times.
Nickel-metal hydride batteries
We are practically not common, as they are inferior to lithium-ion batteries.
Advantages:
- small dimensions;
- high specific capacity;
- ecological harmlessness;
- no memory effect.
Disadvantages:
- high price;
- it is impossible to store in a discharged;
- lifetime does not exceed 500 cycles;
- high indicators of self-discharge;
- reaction to negative temperatures.
Lithium-ion batteries
The most popular and high-quality batteries.
Advantages:
- lack of memory effect;
- fast charge (about 30 minutes);
- high specific power;
- minimum self-discharge not exceeding 20% \u200b\u200bper year;
- very long service life (bought 1 time for life).
How to choose a screwdriver battery - cartridges or gearboxes
There are screwdrivers with a quick-over three cam patron with a clamping range of 0.5-13 mm, and there are both a six-sided seat under the shank of 1/4 inches. More practical is a quick-sample cartridge, as it allows you to use any snap, which is suitable for diameter. Pay attention to the more practical one screwdriver, which has more patron diameter.
The hexagon cartridge will be convenient if necessary, a frequent change of equipment, as well as work in hard-to-reach places. To work with such a screwdriver, drills with a hexagon shank are needed.
Rotation to the cartridge from the engine is transmitted through the gearbox, the gears of which can be made from both metal and plastic. Metallic options are more characteristic of professional models, but can also meet among amateur.
How to choose a screwdriver battery - rotation speed
This indicator depends the speed with which you can twist or unscrew. To work with self-draws and screws, you are enough 500 rpm, you can even less. If you are going to use a screwdriver also for drilling, then the speed should begin from 1000 rpm. You must understand that these indicators are relatively small. So the Bulgarian rotation speed reaches 10,000 rpm. You can adjust the speed of rotation using a special regulator, the presence of which is simply mandatory.
Choosing this or that model, remember that your tool may require prevention or repair. Only popular and well-known brands have their own service. To new parts for spare parts are harder. Successful purchase.
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