How to choose a screwdriver?
Screwdriver - almost indispensable tool homemaster. During repair work the screwdriver generously helps: with its help it is possible to collect furniture and install interior doors, fix plasterboard structures, plinths. How to choose a screwdriver, so he served for a long time, will tell the Country of Soviets.
Today, the market of building materials andtools offers a huge number of models of screwdrivers from different manufacturers. The characteristics of the models presented on the market depend on the choice of the screwdriver.
Screwdrivers are battery and network. Screwdriver, working from the network, has in itsThe design of a transformer that converts alternating current into a constant one, and therefore the weight of such models is higher than that of rechargeable batteries. The disadvantages of network screwdrivers include the limitations of their use, because because of the power cord to use a screwdriver in hard-to-reach places is not always possible.
To choose a screwdriver battery, pay attention to the type of battery. There are screwdrivers with batteriesmetal-hybrid, nickel-cadmium, lithium-ion. The standard nickel-cadmium battery lasts an average of 1000 charges, metal-hybrid batteries are designed for approximately 500 charges. Lithium-ion batteries are considered the most reliable.
Metal-hybrid and nickel-cadmiumthe batteries are subject to a so-called memory effect, when the capacity of the battery decreases with each new charge, if the battery has not been completely discharged before. Lithium-ion batteries are free of this drawback, but nevertheless, they have not yet gained widespread popularity.
By the way, It is best to choose a screwdriver with an interchangeable battery in the kit. The presence of a replaceable battery allows avoiding downtime: while the screwdriver operates on one battery, the second one is charged.
An important characteristic of screwdrivers is their torque. For home use is usually enoughthe moment of 10-15 Nm. Professional models have a torque of up to 130 Nm and can be used for drilling hard surfaces. If the screwdriver is supposed to be used quite often, then a model with a high torque will be preferable.
Rotational speed of the screwdriver shaft can range from 400-500 rpm foramateur models and up to 1200-1300 rpm - for professional. Frequencies of 400-500 rpm will be enough for screwing screws, screws. A higher speed is required for boring work. You can choose a screwdriver with several speeds.
Number of stages for adjusting the torque at the chosen model of screwdriver, type of cartridge,screwdriver assembly - all these are also important characteristics of this power tool. For example, the higher the number of stages of torque adjustment, the easier it is to control the so-called tightening force: all screws and screws will be screwed strictly to the required depth. And the presence of a set of additional attachments makes the screwdriver more functional.
To select a screwdriver, It is necessary to "try on" it. It is necessary to hold the chosen model in hands,checking whether it is convenient to "sit" a screwdriver in his hand, or whether the hand is too quickly tired. An important role is played by the balance of the instrument, as well as the ergonomic design.
Select the screwdriver correctly - the task is fairly simple if you know the basic characteristics of this power tool and accurately imagine the tasks that will be performed with it. Good luck with your choice!
