What Bits Are Needed For A Screwdriver
Self-tapping screws. A thing simply necessary in construction, you can not do without it if you decide to hang a shelf, a cabinet, a picture, assemble furniture, build a house. There are a lot of types of screws, as well as building materials for which they are intended. Consider the most common ones. To tighten, you will need screwdrivers or bits for a screwdriver.
Their main distinguishing feature is a rare thread pitch. The distance between the threads is noticeably greater than, for example, for metal screws. This is because the tree itself is less dense and solid than iron. They can be black, white, golden, depending on the color of the material you are working with. The most commonly used color is black. If you should screw, for example, a yellow furniture hinge, of course it is better to take a self-tapping screw in tone.
The length of the screws. From the shortest 11mm, the so-called seeds, they got their name because of their small size, from about a sunflower seed, to the longest 200mm.It is necessary to select a self-tapping screw so that the connection of parts is tight. For example, if you fasten two bars at 50mm, take a self-tapping screw with a minimum length of 75mm, you can also 90mm.
The diameter of the screws. Black self-tapping screws (the most commonly used) have a diameter of 3.5mm, 4.2mm, which allows you to twist them without prior drilling.Yellow have a diameter of 2.5. 6mm.
Holes for self-tapping screws are required if the diameter of the self-tapping screw is 4.5 mm or more. If the bar or workpiece is thin, you can drill a hole for the 4mm hardware.4.5mm will require a 3mm-3.5mm hole, depending on the density of the tree.Under a 5mm self-tapping screw you need a hole of 3.5mm-4mm.For 6mm. 4.5mm, then the wooden blank will not crack. Use a conventional drill for metal, as there are no drill bits for wood with a pitch of 0.5 mm.Too large a hole should not be drilled either, otherwise the adhesion density will be low.For black, you will need a screwdriver with a PH # 2 connector, or the same bit. For yellowbit PZ No. 1, No. 2 or No. 3, depending on the diameter of the screw.
As a rule, they have a frequent step, the distance between the threads is very small, unlike wood screws. A frequent step is required for dense material so that the grip is reliable.Black metal screws have a diameter of 3.5mm. If you screw thin tin, then you can not pre-drill. If the thickness of the workpiece is 2mm or more, you need to make a hole of about 2.8-3mm.They have a PH No. 2 connector.
Galvanized sharp self-tapping screws with a washer (PH connector No. 2).
They allow fastening sheet metal up to 0.9 mm without drilling holes. Also suitable for fastening wood.A large hat allows you to more tightly press the material to be fixed, serves as a washer. They have a diameter of 4.2 mm, length from the shortest by 13 mm, to the longest by 64 mm.
Self-tapping screws with a press washer with a drill.
Such metal can be attached up to 2mm, without drilling a hole. At the end there is a drill, as if he drills a hole for himself and twists.For such a bit PH # 2 is required.
Designed for fixing roofing materials, as the name implies. Diameter 4.8mm and 6.3mm. Lengths from 19mm to 100mm. There are different colors, depending on the color of the material, blue, brown, just galvanized.For these, a 8mm hexagon socket bit is required if the diameter of the self-tapping screw is 4.8mm, and 10mm if the diameter of the hardware is 6.3mm.It has a rubber gasket to prevent the roof from leaking.
Furniture screw (confirm).
It is used in the assembly of furniture, length 50mm, requires preliminary drilling. For him there is a special drill, for two diameters, since its thickness is first of the same size, towards the end there is a thickening.You will need a 4mm hexagon wrench if you twist by hand, or a bit for a screwdriver. Hex 4.
A screw with a hexagonal head (sometimes called a capercaillie).
This is perfect for heavy structures, where you need special strength. Designed for wood, has a thickness of 6mm-10mm. Be sure to drill a hole under it before screwing it on. For 6mm screw. 4.5mm, for 8mm. 6mm, for 10mm. 7.5mm-8mm.To tighten such screws, you need a wrench, the hat has a hexagonal shape with a diameter of 10 mm, 13 mm, 17 mm, depending on the thickness of the screw.
If you use a self-tapping screw with a dowel, then select the dowel so that its diameter is approximately two times the diameter of the self-tapping screw. For example, if a 3.5mm screw is a dowel 6. If 4mm or 4.5, then the dowel is 8mm.Make a hole in the wall to the size of the dowel diameter.
Types of bits for a screwdriver. What and how to twist
Everyone who is engaged in construction, repair and at least once holding a screwdriver in their hands knows that screwing screws is rather dreary and requiring time and effort, and if there are thousands of them. You just can’t do without a screwdriver. Bit. A special nozzle with which you can twist and unscrew the screws, nuts, bolts. There are many types of bits; each type of fastener has its own nozzle. Let’s consider them in more detail.
It has the ph marking (stands for Philips). There are several sizes, from No. 0 to No. 4, the larger the number, the larger the cross, and accordingly, the larger the screw is intended for.
The first cross is only suitable for self-tapping screws with a diameter of 2.5-3mm. Cross number 2 is the most common bit, it is suitable for black screws for metal, wood, galvanized screws with a washer. These are the most popular types used in construction, repair, in everyday life. Cross number 3 and number 4 is rarely used, mainly in the repair of large items, cars.
There are cross tips with a Tin coating (titanium nitrite)
Is made to increase wear resistance, the company Bosch produces such, it is easy to recognize by the yellow coating.The length can also be different, from short 25mm to 150mm, it all depends on the nature of the work and the shape of the part, the workpiece with which you work. If a longer length is required, then a special extension cord (up to 300 mm in size) is required, having a flexible shape, which allows you to work in hard-to-reach places.
Used for yellow (yellow-passivated) self-tapping screws, are white. Also has several sizes. For self-tapping screws with a diameter of 2.5 mm, nozzles No. 0 are used, for 3.5-4 mm. Nozzles No. 2, if a self-tapping screw above 4 mm. Nozzles No. 3, the same is suitable for tightening anchor frame bolts.Unlike the Ph nozzle, Pz has additional notches; it also looks like a cross. In case you do not have Pz at hand and you need to tighten the yellow self-tapping screw, you can use the usual Ph cross.
Used to tighten hexagon socket head screws. For example, if you are assembling furniture, you will need a 4mm hexagonal bit, it is suitable for confirmation (furniture screw). The assembly process is noticeably faster, unlike manual assembly.
Designed for torsion hardware with external hexagon. The most common. 8mm, suitable for roofing screws with a diameter of 4.8mm. For 6.3mm self-tapping screw, a 10mm bit is needed. Since the diameter of the self-tapping screw is rather large, a sufficiently powerful screwdriver will be required.
Size range from 6mm-13mm. There are magnetic ones, there are simple ones, of course it’s more convenient to work with a magnet, the self-tapping screw does not drop out, their cost is about 1.5 times higher than usual ones.
Asterisks (marked with the letter “T”. Torx hole)
These are used in household appliances, cars. Size range from T8-T40. Of course there are T5, T6, T7, such are used to repair cell phones and are sold only by individual screwdrivers, or in sets. They are very thin and can not be twisted with a screwdriver, accuracy and accuracy are needed, therefore only by hand.It must be borne in mind that the stars come with an internal hole, also without it, it is worth paying attention when buying.
They are used when working with screws, screws. There are several sizes, measured by the width of the tip in millimeters.
There are combined bits, such have on the one hand, for example a cross, on the other flat (slot).
There are very specific bits, such as a double pin, that looks flat, only with a slot in the middle.
Trihedral bits (tri wing), looks like a cross, only has three faces.
The bat looks like an ordinary cross, but its edges do not form a perfect cross, are slightly offset. The use of such bits is very rare, it is unlikely to be needed for domestic purposes, rather when repairing household appliances and equipment.
Always select the bits correctly so that she sits tight in the self-tapping screw, this will extend her life.
Drywall bit. This has a special limiter, when the self-tapping screw reaches the stop, the limiter does not allow it to go further, this allows you not to spoil the appearance of the cardboard, save time.
If you use several nozzles at once, constantly change them, it will not be amiss to use an adapter for bits, a special device that allows changing the nozzle without unscrewing the screwdriver’s chuck.
In principle, if you need to twist the screws, but the screwdriver is not at hand, or it is not at all in the household, then the use of a drill is quite acceptable. Certain skill is required, of course, because it does not have a friction clutch and the cartridge does not stop torsion, when the self-tapping screw is fully tightened, you need to work slowly, very finely hold the start button, otherwise you can collapse not only a bit, but also a self-tapping screw.