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 hard rock. The system is thought to have been invented independently by Stenuick. Origin of the nameDTH is short for “down-the-hole”. Since the DTH method was originally developed to drill large-diameter holes downwards in surface-drilling applications, its name originated from the fact that the percussion mechanis. .
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 flui. .
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 quarry face in order to place the drill hole in.
[pdf] 
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] 
Address: 16-3 رقم 6، 6th of October City (2), Giza Governorate 12451, Egypt Phone:+201221641594 Plus code:WVCJ+96 6th of October City (2), Egypt Product: 1. Portable compressors 2. power generators 3. pumps and tools 4. Vacuum Pumps 5. oil filter .
Address:1 Street 273, El-Basatin Sharkeya, El Basatin, Cairo Governorate, Egypt Phone:+20227545076 Plus code:X7HH+G4 El Basatin, Egypt Product: 1. air oil separator, 2.. .
Address:El Nasr Rd، DAHAR، Hurghada 2, Red Sea Governorate, Egypt Phone: +20653552747 Plus code:6RWF+HJ Hurghada 2, Egypt Product: 1. centrifugal air compressors 2. PET compressed air solutions 3. Lubrication Equipment BAUER. .
Address:N83 Al Sabtiah, Boulaq Num.1, Bulaq, Cairo Governorate, Egypt Phone:+20225774400 Plus code:368P+76 Bulaq, Egypt. .
Address:كم 28, Cairo – Alexandria Desert Rd, Abou Rawash, Giza Governorate 12677, Egypt Phone:+20235391987 Plus code: 326M+44 Abou Rawash, Imbaba, Egypt Product: 1. condensing units 2. BSB & BSD 3. BSV 4. BMP 5. Industrial Air Compressor 6. rotary.
[pdf]