The Government of the Russian Federation has expanded the list of technically complex goods, adding a new item to it - electrified tools (hand-held and portable electric machines) (Resolution of the Government of the Russian Federation dated September 17, 2016 No. 929 "). These, for example, include electric drills, electric grinders and electric cutting machines, electric impact wrenches, electric hammers, etc. ().
This change means a special procedure for regulating consumer rights when defects in goods are discovered. In particular, they may refuse to fulfill the purchase and sale agreement and demand a refund of the amount paid or exchange the product for a similar one, but at a different price. general rule within 15 days from the date of sale (clause 1 of article 18 of the Law of the Russian Federation of February 7, 1992 No. 2300-I ""; hereinafter referred to as the law on the protection of consumer rights).
But at the same time, you can perform the specified actions after 15 days, but only in the established list of cases: if a significant defect in the product is discovered (for example, which cannot be eliminated), if the deadlines for eliminating the defects are violated. This also applies to cases where the product cannot be used during each year of the warranty period in total for more than thirty days due to repeated elimination of its various deficiencies ().
If the seller, at the conclusion of the contract, stipulated that he was selling goods with defects, are the corresponding requirements of the buyer subject to satisfaction? Find out from the material "The rights of the buyer when defects are discovered in the goods" in "Home Legal Encyclopedia" Internet version of the GARANT system. Get 3 days free!
By the way, technically complex goods currently include: digital photo and video cameras and lenses for them, refrigerators, computers, game consoles with a digital control unit, mechanical wrist and pocket watches, as well as electronic ones, etc. The same applies to some vehicles - cars, motorcycles, floating vehicles with an electric motor and others (Resolution of the Government of the Russian Federation of November 10, 2011 No. 924 "").
December 14, 2016 No comments
A screwdriver has become one of the most popular tools among professionals and home craftsmen today. It will be useful when assembling furniture, installing structures made of plasterboard and plywood, laying roofs made of metal tiles and other work. Let's talk about this tool in more detail.
The screwdriver is manual electric tool for installing or removing fasteners and drilling. A screwdriver is similar in appearance to a drill, and the principle of operation of these tools is also similar: a motor located in the body drives the attachment through a gearbox, which does the work. The difference lies in the energy source (the screwdriver operates on direct current) and the lower speed of rotation transmitted to the attachment. The latter is due to the fact that the screwdriver is initially designed to work with fasteners, at which high speeds are not needed. True, modern screwdrivers differ less and less from drills in this parameter. It is not for nothing that most manufacturers position their tools as multifunctional, calling them drills and screwdrivers.
On the body of the tool there is a start button, a reverse button, a torque setting clutch and a speed switch.
Some screwdrivers also have a backlight located here. The battery is inserted into the housing from the bottom of the handle and securely fastened there with latches. This arrangement contributes to good balance of the instrument.
SCREWDRIVER DEVICE:
The chuck is designed for attaching attachments (bits and drills) and transferring them rotational movement. The most common is a quick-release chuck, which allows you to easily clamp the attachment without using additional tools.
Manufacturers also produce specialized power tools in the line of screwdrivers - for example, today's popular electric screwdrivers, which are small in size and low power. They do a great job with small repair work in an apartment, in a country house. Impact wrenches, in contrast, have great power; they will help unscrew, say, rusty bolt when removing a wheel from a car.
By rotating the torque coupling, the desired value is set opposite the marks on the screwdriver body.
Double coupling quick-release chuck. When installing and removing attachments, the couplings are rotated in different directions.
Additional cuff for setting the operating mode of a powerful screwdriver (twisting, drilling, drilling with impact).
An electric screwdriver is great for small repair jobs. An impact wrench has increased power and can become an assistant during construction.
When choosing a screwdriver, you first need to pay attention to two parameters - torque and rotation speed. The magnitude of the torque shows how much force is applied to the screw (drill) being turned during operation. For example, the hole will depend on this
What diameter can this screwdriver drill? In household tools, the torque is 10-16 N m.
U professional models this figure can reach up to 130 N m. The rotation speed of household tools is in the range of 400-550 rpm. For screwdrivers with a drilling function, it reaches 1,300 rpm. Budget models They usually have 1-2 speeds, professional tools are most often three-speed. In addition, the rotation speed is adjusted within one speed by pressing the power button.
The power source for screwdrivers is rechargeable batteries. Nickel-cadmium, lithium-ion and nickel-metal hydride batteries are most often used for these purposes. Output voltage batteries can be in the range of 3.5-36 V, but the most applicable range is 9.5-14.4 V. The power of the screwdriver depends on the voltage, although the relationship is not direct.
The most important parameter The battery for screwdrivers is its capacity, measured by the number of hours during which it is able to provide the declared current strength. In addition, batteries differ from each other in recharging life, self-discharge rate, and the presence of a memory effect.
Recharging life is within 1,000 times, high self-discharge, but they have minimum price among other types of chargers.
The resource reaches 1,500 recharging cycles, they have an increased capacity, discharge by 1% per month, the price is average.
They have a reduced discharge time, there is practically no self-discharge, the resource reaches 3,000 recharging cycles, the price is the highest.
When working with the tool, attachments are used (bits for working with fasteners and drills). The shank of the nozzles is made in the form of a hexagon, which facilitates its installation. The attachments can be directly clamped in the chuck or installed in an adapter clamped in the chuck. The working part of the bit is something like a screwdriver with a configuration that depends on the type of fastener this attachment is used to work with.
When starting work, you need to select a bit that matches the fastener head. The most commonly used are cross-shaped bits, which come in PH and PZ standards. PH is short for Phillips. PH bits are cross-shaped, universal, they can be used for a variety of fasteners. Sizes - from 0 to A, the most popular is No. 2. The designation PZ is derived from Pozidrive, these are also bits with a cross-shaped working part. In addition to the main large ribs, they have additional smaller diagonal ribs. Thanks to them, the adhesion area with fasteners is even larger than that of PH bits. The sizes of such bits are from 0 to A, the most common are 2 and 3.
For repair household appliances and cars cannot do without T-bits (from Torx Hole), with which you can unscrew and tighten screws with a star hole on the head. Flat or slotted bits are suitable for working with fasteners in soft material, not too much high load. Such bits are marked SL (from Slot).
To work with bolts and nuts, use bits with a working part in the form wrench. They can only be used with fairly powerful screwdrivers (wrenches). Bit sizes range from 6 to 13 mm, but we must remember that this is the size of the bit itself, not the bolt or nut.
Attachment sets for screwdrivers often include drill bits with a hex shank. The angle attachment will help when working in hard to reach places. Drill chucks for drills with cylindrical shanks are often used as attachments for screwdrivers.
Options for screwdrivers from different manufacturers may vary significantly. Their presence increases the convenience of working with the tool, but at the same time they can significantly increase the price of the screwdriver. Therefore, when choosing a tool, you should evaluate the need for a particular option.
High-performance compact and powerful cordless drill/driver. Suitable for working with fasteners and drilling. Torque can be controlled by pre-setting the 5-stage torque clutch and drilling position. It has one speed and a quick-release chuck. Package Included Charger, battery pack, plastic suitcase.
The cordless drill/driver is designed for drilling holes in various materials, as well as tightening and unscrewing screws during assembly work. Thanks to the ergonomic handle with rubber lining and low weight, the screwdriver will become an indispensable assistant in everyday life. The kit includes a rechargeable flashlight, two rechargeable batteries, a charger, a set of bits, and a plastic case.
This drill/driver belongs to a new generation of cordless power tools with new Li-lon batteries. The new motor design ensures economical energy consumption, which significantly increases operating time. The ergonomic handle and body are rubberized as much as possible, which helps to securely hold the tool. The model is equipped with a holster for wearing on a belt. The kit includes an additional battery, charger and flashlight.
Unless you work in a construction company where a competent person selects tools, most likely you need household equipment for non-professionals. How to understand the classes of power tools and understand whether the model you like has enough power? And vice versa - how not to overpay for those characteristics that you do not need?..
Let's understand how power tools and hand-held electric machines are classified.
This is not about how loud the hammer hammer is and whether you can hear an electric saw at the other end of the village. Power is the very characteristic that determines the ability of a tool to work for a long time, without stopping and overheating. How important this is depends on the tasks assigned to the equipment and the conditions of its operation.
The most common division of tools for us is based on the type of work that needs to be done.
This classification is based on the method of protection against damage electric shock– and the following are the most serious. They are placed at the end of the article because to get to know them you need an understanding, for example, why professional tools the safety class is lower (this is discussed at the beginning of the article).
Classes of power tools and hand tools electric machines can be determined by the markings.
| Class | Working insulation | Grounding | Purpose | Precautionary measures |
| 0 | Eat | No | Work in premises without increased danger | The tool must be mounted in a device with a grounded housing |
| 01 | Eat | Grounding device without grounding conductor | ||
| 1 | Eat | Grounding device with conductor, ground-contact plug | Work in production premises and residential buildings | Connect to a grounded outlet. Working with rubber gloves |
| 2 | Double or reinforced | No | Work in industrial premises | No (except for use in wells and metal containers) |
| 3 | Eat | No | Any conditions, including in particularly hazardous areas | No |
The same classification of power tools for electrical safety applies to other household appliances: the first class of electrical safety is most common among equipment; the third is universal.
The lower this class, the more often you will have to stop the device to cool it down (20 minutes of operation after a 15-minute break is the optimal value for power tools; as the class increases, the operating time also increases).
The heat resistance itself depends on the winding material.
| Class | Winding materials | Maximum t |
| Y | Cellulose or silk | 90⁰C |
| A | Cellulose or silk with dielectric treatment | 105 ⁰C |
| E | Resin and organic film | 120⁰C |
| B | Mica | 130 ⁰C |
| F | Synthetic materials or asbestos | 155 ⁰C |
| H | Silicone impregnated elastomers and fiberglass | 180⁰C |
| C | Mica, ceramics, glass, quartz with inorganic processing | 180⁰C |
For convenience, IP-XX format marking is used, where the first digit in place of X indicates the degree of protection against solid particles, the second - against the penetration of moisture into the device.
| 1st digit | Decoding | 2nd digit | Decoding |
| 0 | No protection | ||
| 1 | Protection against bodies with a diameter > 5 cm | 1 | Protection from moisture entering the device from above |
| 2 | Protection against bodies with a diameter > 2.5 cm (operator's fingers) | 2 | Protection from moisture entering the device at angles of 15 ⁰ |
| 3 | Protection against bodies with a diameter of 2.5 mm (cables) | 3 | Protection against moisture entering the device at angles of 45 ⁰ |
| 4 | Protection against bodies with a diameter > 0.1 cm | 4 | Complete protection against moisture |
| 5 | Full protection | 5 | Protection against moisture entering the device under pressure |
| 6 | Absolute protection (including from dust) | 6 | Protection against moisture penetration in case of short-term drowning |
The marking is intended to provide the user with the maximum understanding of the hazard class of the power tool. If doubts still remain, you need to consult with a specialist, making sure to indicate the operator’s qualifications for this tool, conditions of use and duration of work.
Such hand power tool How a screwdriver has become very popular and sold in the tool market these days. This is because he is an excellent assistant and household, and for professional builder. After all, you will agree that with the help of an electric screwdriver it is much easier, better and faster to perform a number of repair and household types of work. For example, if you need to hang a picture or a shelf on the wall, then using a regular screwdriver you will have to spend a lot of time and effort on such a seemingly simple work. But using an electric screwdriver you can do it in a matter of minutes.
Due to the fact that power is constantly supplied from the network through the wire, you can work with a corded screwdriver exactly as much as you need. There is no need to worry about charging the battery or stopping work if it runs out. A corded screwdriver, unlike a battery-powered one, has less weight due to the absence battery. But you must agree that an important factor when working with a power tool is its weight. A heavy tool quickly tires your hands, making it impossible to work with it for a long period of time. Another significant advantage is that when purchasing a corded screwdriver, you only pay for the technical characteristics of the tool. In the case of a battery-powered device, its price includes the cost of the battery. This means that its price may not correspond to the characteristics for which you could purchase a cheaper network analogue. A corded screwdriver also benefits in terms of costs, because if the battery cell breaks down or wears out, it will have to be purchased again.
But the main advantage of a cordless screwdriver is its mobility. After all, independence from an outlet allows you to carry out the work process anywhere, be it a high-rise construction site or basement. The power cord does not interfere with work and there is no need for extension cords and their constant movement to the work site.
IN cordless screwdriver There is one more important factor that is not present in the network device. This is the type of battery used and its technical characteristics.
TO technical specifications battery characteristics include its operating voltage, charge capacity and full charge time. Voltage affects the power of the screwdriver itself; the higher the voltage, the greater the power of the screwdriver, and therefore the greater its torque. The charge capacity affects the duration of operation of the screwdriver from one full charge, that is, this is the amount of energy that the battery is capable of containing. The full charge time shows the period of time during which the battery is able to fully replenish its charge.
There are three types of screwdrivers used: nickel-cadmium (Ni-Cd), nickel-metal hydride (Ni-MH) and lithium-ion (Li-Ion). They all have their pros and cons, so to organize them it is better to consider them based on the following parameters:
- Number of charges. Nickel-cadmium can withstand up to 1000 charges, nickel-metal hydride - up to 500, and lithium-ion can be charged an almost infinite number of times.
- Memory effect. This parameter reduces the battery capacity if it was not fully charged or was charged when partially discharged. This effect is absent in lithium-ion batteries, which cannot be said about the other two types of batteries for a screwdriver.
- Resistance to low temperatures. Nickel-cadmium batteries can be used without problems when working outdoors at sub-zero temperatures. The remaining two types of batteries lose their maximum charge capacity at low temperatures, and temperature also affects their charging speed.
- Safety. In terms of environmental performance, the lithium-ion battery wins.
The online store offers a wide selection of models of electric screwdrivers of any type. in our online store you can enjoy affordable price simply by filling out an application on the website or calling the number: +7 495 268-06-66.
If you doubt your choice or need help, our experienced consultants are always ready to help. They will answer your questions and help you choose the right model.
You can contact them directly on our website by clicking the button in the lower right corner, you can fill out or call (+7 495 268-06-66) and they will be happy to provide you with all necessary information and will answer all your questions.
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