Although in appearance screwdriver bit and looks small and unprepossessing, in any construction, it can greatly facilitate human labor. In addition, the small dimensions of the bits can be misleading about their role, because they are subjected to incredible loads. Because of this, some treat bits as consumable disposable materials..
Choose a bit for a screwdriver for a screw
To check how much the selected bit fits the screw is quite simple: it should be well held in its head. However, a suitable size does not guarantee that sufficient torque will be transmitted. If the gap is large, the bits will wear out faster.
If the bit is not held in the screw head, even working with the best tool will not bring joy. When tightening the connection, you can hear dull unpleasant sounds that will occur when the tip is clicked in the screw head. If you work a little with such a bat, its surface is polished and everything remains – just throw it away. If the bit turns and slides in the screw head, try to double-check how correctly you selected it.
If we talk about screws with a cross slot, it is important to know that there are two incompatible systems. In simple screws on their head there is a simple cross, therefore, in the bit with the designation Ph there should be one cross blade. Moreover, such a bit should ideally fit into the head of the hardware. Angled lateral surfaces of the bits should disappear in the grooves of the screw head. When processing such hardware, it is important to lead the bat perfectly straight, since skews reduce their service life.
Although in appearance screwdriver bit and looks small and unprepossessing, in any construction, it can greatly facilitate human labor. In addition, the small dimensions of the bits can be misleading about their role, because they are subjected to incredible loads. Because of this, some treat bits as consumable disposable materials..Choose a bit for a screwdriver for a screw
To check how much the selected bit fits the screw is quite simple: it should be well held in its head. However, a suitable size does not guarantee that sufficient torque will be transmitted. If the gap is large, the bits will wear out faster.
If the bit is not held in the screw head, even working with the best tool will not bring joy. When tightening the connection, you can hear dull unpleasant sounds that will occur when the tip is clicked in the screw head. If you work a little with such a bat, its surface is polished and everything remains – just throw it away. If the bit turns and slides in the screw head, try to double-check how correctly you selected it.
If we talk about screws with a cross slot, it is important to know that there are two incompatible systems. In simple screws on their head there is a simple cross, therefore, in the bit with the designation Ph there should be one cross blade. Moreover, such a bit should ideally fit into the head of the hardware. Angled lateral surfaces of the bits should disappear in the grooves of the screw head. When processing such hardware, it is important to lead the bat perfectly straight, since skews reduce their service life.
The Pz drive system provides better transmission of increased torques. The geometry of the screw differs in narrow additional grooves between the cross slots. These bits are equipped with additional blades, which improves the power connection. The angle at which the bit tip enters the screw head may vary. So that neither the self-tapping screw nor the bit are damaged, the posidrive screws should be screwed in at a certain angle.
If the bit size was chosen correctly and the necessary effort was applied, but it does not fit, then most likely you didn’t save on that: as the results of numerous examinations show, frankly cheap bits can show poor pairing, and this does not concern the issue of material hardness. Pozidrive bits in a cheap version are practically not suitable for use.
Screw system bits
The most common screw systems are posidrive, slotted screw, as well as Philips systems. For slotted screws can screwdriver bits not to be used. The Philips system is often used in the manufacture of furniture and in joints that are not subjected to heavy loads, and to better transmit the rotational force, use the posidrive system. It is important to note that almost all bits require a holder. There are products with a nozzle system and «locking», as well as an SDS holder. Double and long bits can be used without holders.
It is not difficult to check the correspondence of bits: put it on the screw that you plan to use. If the connection is weak, the bit will stagger. On its packaging, you can see the size and type of bits. If it is necessary to provide a large tightening torque, then it is better to use the Pz system. By using a bit holder with a magnet, you can increase adhesion.
Choose a bit for a screwdriver at a cost
When using cheap kits, you will be disappointed. In them you are unlikely to find the marking of the working part of the material, on which the speed and quality of work largely depend. And when you buy a bad tool, you just throw money away. If the material has received poor hardening, it also has poorly adhered forms and specified accuracy, it is better to simply refuse to purchase it. To buy a good set, you will need to spend at least 80 hryvnia, however, the service life of such bits will be quite significant. And the cost of one normal bit will be from 12 hryvnia.
In relation to price, there is such a rule: if cheap bits look good, then only until the first use. For the manufacture of high-quality bits, chromium-vanadium, alloys of tungsten and molybdenum are used, which simply cannot but affect their cost. On a quality product, the name of its manufacturer, size and type of bit will be embossed.
If you come to the choice with due care screwdriver bits, you will get a quality product, the work with which will give you real pleasure.
