By way distinguish battery power and operating from a network
Rechargeable different free zone access and low weight, but screwing on the wires do not require a change of power sources and perfectly cope with hard materials.
screwdrivers are also divided into professional and consumer. first option is much more expensive, but its performance is significantly better than that of consumer expertise.
However, the differences between the types of food are not the only important features of the power screwdrivers.Different batteries are also very strong influence on the operation of this device.
Nickel kamdievye (NiCd) batteries are low cost, but their characteristics are unlikely to please the owner.NiCd different small capacity, dependence on the memory card (to complete the work necessary to fully discharge and charge) and a small number of possible charging and discharging.
Nickel-metal hydride (NiMh) batteries, though more expensive, but dependent on the memory of this type is quite we
most expensive and easy to use are lithium-ion (Li-Ion) batteries.They are characterized by high capacity, no memory effect, low weight and a large number of charge-discharge cycles.The only serious drawback Li-Ion - not the longest life expectancy.These batteries after three years of service on their own start to decompose.
considered the main types of screwdrivers, proceed to the peculiarities of this type of equipment
torque affects the length and diameter of the swirl details, as well as the possibility of drilling certain materials.This means that the higher the torque, the screwdriver will be easier to drill very strong and solid preform.In professional appliances this characteristic can reach 130 Nm, while the domestic version is suitable and 20Nm.
Speed indicates the speed of drilling, as well as the functionality of the model.For loosening and tightening screws in a medium-hard materials suit some 400 rpm, but the drilling of the same materials should be at least 1200 revolutions per minute.