Drywall bit with limiter: nozzle with a "skirt" on the screwdriver

When working with drywall, you can easily squeeze a self-tapping screw, which is why sheets of material are damaged: cracks appear on the gypsum or cardboard ruptures from the outside. In some cases, the cap can pass through the GCR through, as a result, the sheet will not be pressed against the profile. In any case, due to pinch, the entire structure noticeably loses its strength and reliability. A drywall bit with a limiter will avoid these problems.

What it is?

The bit for working with GCR with a limiter is a special nozzle for a drill. It is used to prevent the screw from being pinched during twisting. screwdriver. There is a limiter on the bit, which resembles an inverted cup, it is wider than the head. When twisting, it rests on the sheet and does not allow the hat to go deep into the body of the sheet.

Such a restriction allows the master not to fear that the self-tapping screw will be overtightened. But you don’t have to tighten it again, since a bit with a limiter for drywall allows you to tighten all the screws tight enough and deepen them to the required level. As a result, the speed of work is significantly increased, since there is no need to spend time on monitoring and verification. The only thing that is required is the minimum skills for working with a power tool, because the screws will be screwed in with a screwdriver.

Depth-limiting bits are available for various types of materials. When buying, you need to pay attention to the marking. The nozzle must be designed specifically for drywall, otherwise there is a risk that the material will be damaged. You also need to pay attention to the fact that the markings of the bits and caps of the screws coincide. Otherwise, the work will be uncomfortable, the risk of damage to the screws, nozzles and even the power tool itself will increase.

Nozzles marked PH 2 are suitable for standard black drywall screws with a diameter of 3.5 mm, the head of which has a cross-shaped slot.

Selection rules

To choose the right bit, you need to consider the following points:

• The diameter of the screws. The standard size of the head of the self-tapping screw for drywall is 3.5 mm, the appropriate PH 2 nozzle should be used for them.
• If the self-tapping screws have an eight-beam slot - a cross-shaped recess with four shallow additional beams - then bits of the PZ standard are used. The device is selected taking into account the size of the cap.
• Bit length. If the work is carried out in convenient conditions, then a long nozzle is not needed, if the work is carried out in hard-to-reach places, then a longer bit may be needed. Usually they are used to create shelves, niches and other architectural elements.

• The durability of the tool depends on which alloy it is made of. The most reliable alloys are chromium with vanadium, tungsten with molybdenum and chromium with molybdenum. A bat made from one of these alloys is guaranteed to last a long time.
• Particularly carefully you need to inspect the nozzles made in China, because the reject rate even among chromium-vanadium alloys is the largest here.
• A small magnetic holder in the nozzle will allow you to hold the screws at the end of the bit, so they do not need to be held and they will not fall. This will greatly simplify the assembly process of drywall construction.

Checking the quality of the holder magnet is simple: after dipping into a bunch of screws, at least 3 fasteners should stick to the bit. If less, then the strength of the magnet for convenient operation is insufficient.

• The bat is picked up only after being purchased screws, it should correspond to the fasteners, and not vice versa.

Additional coatings increase the life of the product: nickel protects against corrosion, titanium - from various mechanical damage, diamond spraying makes the bit wear-resistant, and tungsten and carbide add strength.

Features and Benefits of Using the Limit Bits

A nozzle with a limiter is a necessary thing when working with drywall. It gives the master very important advantages - the speed and quality of the work. Since there will be no damage to the sheet, the rigidity and reliability of the structure will increase. However, the advantages of using a special bit do not end there:

• Regardless of the value of the force exhibited on the screwdriver, the risk of passing GCR through and through is reduced. This is especially important for beginners who are not yet accustomed to the instrument and do not know what effort is enough to tighten the screws tightly, and which will be excessive.

• All hats immediately flush with drywall, sticks out nothing, does not rise above the surface.
• The price is more than affordable: a quality fixture can be purchased for an amount within 200 rubles. Using the limiter pays off very quickly, because due to damage you do not have to replace sheets of material with new ones.

A special nozzle is necessary for the correct and high-quality work with large volumes of drywall. She makes the work better and faster.