Pistol guns have proven to be a great alternative to manual labor in difficult conditions where you need to work with a solid base. This tool has several advantages. Hammering dowel-nails using construction mounting cartridges occurs without preliminary drilling of the base, and this not only greatly facilitates work, but also saves time for one operation. These guns work without electricity, which allows them to be used in the field.
Varieties of pistols
Although there are several types of such a tool (gas, pneumatic and powder), the mounting cartridge is used only in the latter. Structurally, it is close to firearms and works on a similar principle, therefore, it is mainly produced at arms factories. Accordingly, the quality is confirmed by well-known world brands - TOZ, "W alter", Spit, Remington, Hilti and others.
Also, pistols are divided according to the type of supply of cartridges into: single-shot (manual feed), semi-automatic (cassette-disk) andautomatic (cassette). The latter are the most productive, which can make about 700 connections per hour.
Special gun designs are available for specific applications such as metal roofing, corrugated decking or tunnel waterproofing, concrete work, mild steel work, metal grating fixings.
The mounting cartridge used in such pistols is blank. However, safety precautions when working with this tool must always be observed. The device itself is disassembled, inspected, cleaned and lubricated approximately every five thousand shots.
Mounting chuck: principle of operation
The principle of operation of all mounting guns is the same, only in powder guns the dowel is clogged with a piston, which is actuated by the force of the explosion of the cartridge. The force of impact on the dowel is chosen in accordance with the density of the base into which it is driven. It can be adjusted either by choosing the power of the cartridge, or mechanically, if it is provided for by the design of the pistol.
Bulletless (blank) mounting cartridge has the form of a sleeve, the open end of which is rolled and color-coded corresponding to the power. It is usually loaded with smokeless powder. Ignition and explosion occur after the striker hits the igniter cap.
In some cases, there are also mounting cartridge designs equipped with a primer like Berdan and Boxer (used in live ammunition).
Powder guns cannot be used in installation work that involves materials such as glass, ceramics, cast iron, curbstone and granite.
Caliber and power of cartridges
Different brands of powder assembly guns are loaded with their own types of construction and assembly cartridges, which differ in caliber and power.
The most popular calibers for semi-automatic and automatic pistols are 6, 8 x 11 and 6, 8 x 18. And in single-shot pistols like Hilti DX E72 or GFT307, a 56 x 16 mounting cartridge is used. All of them are divided depending on power discharge, which is indicated by a special color marking (yellow, red, blue, gray, black or green). Color identification is repeated on the packaging with cartridges.
A particularly important point is the correct choice of power, since the reliability of the connection will depend on this. So, for example, for driving a dowel-nail into a brickwork or a plastered wall, power up to 500 J is suitable, but you can cope with a steel or concrete base with an impact force of more than 500 J.
