A down-the-hole drill, usually called DTH by most professionals, is basically a jackhammer screwed on the bottom of a drill string. The fast hammer action breaks hard rock into small cuttings and dust that are evacuated by a fluid (air, water or drilling mud). The DTH hammer is one of the fastest ways to drill. .
DTH is short for “down-the-hole”. Since the DTH method was originally developed to drill large-diameter holes downwards in surface-drilling. .
A is first thought to have been used for rock drilling in 1844. Many quarries used hand held tools that required the driller to suspend himself from a rope over the. .
In DTH drilling, the percussion mechanism – commonly called the hammer – is located directly above the drill bit. The drill pipes transmit the necessary feed force and rotation to the hammer and the bit, along with the fluid (air, water or drilling mud) used to. .
DTH products can be used in the following applications:• Mining- drill and blast holes in open pit mining, where the drill operator will drill several holes, then.
[pdf] The working principle of the down-the-hole drilling rigis: compressed air drives the piston in the impactor, hitting the drill bit for rock drilling. The characteristic of this drilling method is that the. .
Down-the-hole rock drilling refers to a rock drilling method in which an impact mechanism is submerged into the blasthole. The torque of the slewing mechanism rotates the impactor and the drill. .
The biggest difference between down-the-hole hammerand top hammer lies in the position where the impact force acts. As shown in the figure, the down-the-hole type, the impact force directly acts on the tail of the drill bit, which is what we call the drill bit; the top hammer type, generally transmits the hammering force provided by the rock drill .
[pdf] 
Address: Kharkivs’ke Hwy, 56, Kyiv, Ukraine, 02000 Phone:+380673223061 Plus code:CJFV+P9 Kyiv, Ukraine Product: 1. Portable compressors 2. power generators 3. pumps and tools 4. Vacuum Pumps 5. oil filter The official representative of Ozen Kompresor in Ukraine is the UNISOL company. In our company. .
Address:Tovarna St, 25, Bila Tserkva, Kyiv Oblast, Ukraine, 09112 Phone:+380672398552 Plus code:R472+3W Bila Tserkva, Kyiv Oblast, Ukraine Product: 1.. .
Address:Akademika Tupolieva St, 8, Kyiv, Ukraine, 03062 Phone: +380952776600 Plus code:F96W+QM Kyiv, Ukraine Product: 1. centrifugal air compressors 2. PET compressed air solutions 3. Lubrication Equipment The company “Sigmatek Ukraine”. .
Address:ул, Topolyans’ka St, 9 Строение 4, Sumy, Sumy Oblast, Ukraine, 40000 Phone:+380504072406 Plus code:WRH6+G5 Sumy, Sumy Oblast, Ukraine Product: 1. condensing units 2. BSB & BSD 3. BSV 4. BMP 5. Industrial Air Compressor 6.. .
Address:Petropavlivska St, 54а, Kyiv, Ukraine, 04086 Phone:+380504072693 Plus code:FFM4+FX Kyiv, Ukraine Product: 1. Fluid Handling Pumps 2. Air Tools 3. Hoist 4..
[pdf] 