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.
[pdf] 
A SILVER air compressor is a silent encapsulated rotary screw compressor designed for performance and reliability. The FIAC silver air compressor model comes equipped with a TEFC high-efficiency electric motor, WYE Delta Starter, Sound attenuating enclosure, FIAC easy control microprocessor. .
FIACquiet rotary screw air compressorsare available in a wide variety of models, which range from 3-50 HP. The FIAC Silver air compressors are easy to. .
There are many benefits to choosing a base mounted quiet screw rotary compressor. The screw unit has low running speeds and high efficiency, and this results. .
Werther provides the SILVER air compressors to small producers, big industry, and all sizes in between. Each industry has very different needs and applications for these products. Some of the common industries we serve include: 1. Laboratory 2. Medical 3. Electronic 4. Food & Beverage 5. Dental Latest generation compressor screw technology with fully integrated aluminum block and direct drive transmission, maximum pressure up to 10 bar, compact and portable for easy mobility, low noise and vibration for close point of use (POU) and minimum piping, plug-and-play operation with no expertise required and high efficient direct transmission contributes to high reliability and easy maintenance.
[pdf] 
1. S82 Pneumatic Rock Drill Powerful gas control system: The sealing performance is enhanced to get more powerful rock drilling impact energy. Field tests show that under different rock conditions, the footage efficiency is 10%-25% above that of YT28; 2. Advanced rotary structure (obtained from t. .
1. S82 Pneumatic Rock Drill Powerful gas control system: The sealing performance is enhanced to get more powerful rock drilling impact energy. Field tests show that under different rock conditions, the footage efficiency is 10%-25% above that of YT28; 2. Advanced rotary structure (obtained from t. .
Compared with YT29A, the speed is faster and diamond drills rock. YT29S/S82air-leg rock drill is a heavy-duty air-leg rock drill with high efficiency and low consumption characteristics. It is especially suitable for use in the construction of railways, highways, hydropower, etc., and is also used. .
S82air-leg rock drill is a heavy-duty air-leg rock drill with the characteristics of high efficiency and low consumption. It is especially suitable for use in the construction of railways, highways, hydro power, etc., and is also used for mine tunneling and various rock drilling operations in.
[pdf]