Face Design

Hammer bits are offered in three basic face designs: concave, convex, and flat face. Each are designed for specific applications and conditions and for varying rock types and hardness

Concave is an excellent all around face design and is used as a general-purpose bit for most conditions while drilling a very straight hole.

Convex bits are used for a combination of speed and service life. Having 2 gage rows, they are also suited for hard, abrasive rock.

Flat face bits are best suited for broken or fragmented ground and hard formations. NAME CONNECTION BUTTON NUMBER BUTTON SIZE AIR HOLES WEIGHT PACKAGE 115MM DHD 340-S 16MM DHD340 13 5*13MM 7*16MM 2 9 each box has three bits. 115MM DHD340 14MM DHD340 13 7*14MM 5*13MM 2 9 115MM DHD340 16MM DHD340 13 5*13MM 7*16MM 2 9 115MM PANTHER40 PANTHER 40 13 5*13MM 7*14MM 2 9 115MM MISSON40 14MM MISSON 40 13 5*13MM 7*14MM 2 9 115MM MISSON40 16MM MISSON 40 13 5*13MM 7*16MM 2 9

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    Silk Road is a state-level large scale enterprise in China, which has been listed among the five industries of Zhejiang Provincial government, the 958 Technology Catching-up Plan and the key enterprises by Zhejiang provincial government. The group is the civilized enterprise of provincial level and contract abiding and trustworthy enterprise of state level.
Currently, Silk Road has 18 subordinate companies with over 4100 employees. It covers an area of over 430,000 m2 with the total building complex area over 230,000 m2 and the total assets of the group amounts to over 1.5 billion.
"Silk Road" trademark, together with its logo, is the first company awarded with "Chinese renowned trademark" in the same trade and Silk Road air compressor is among the first exempted by Chinese government.
By the year of 2008, the total sales revenue of the group is 2.03 billion RMB, with 173 million RMB of profit, and USD10.69 million worth of export goods. Silk Road has been honored with "Special Quzhou Mayoral Award" for the past consecutive eight years.
Silk Road has a sophisticated national-wide retail network supported by the high-quality customer service system. The nine major series of Silk Road product spread from rock drilling unit, screw air compressor to excavator, crawler drill etc, and altogether 18 categories with over 800 individual products.
By far, Silk Road is the largest rock drill manufacturer in the world, and the largest air compressor manufacturer in China. Exports are shipped to over 20 different nations and regions such as United States, Germany, Japan, South Korea, Russia, African and Latin American countries.
Silk Road owns the best fine processing equipment over 1000 units. It has formed the machinery processing system with advanced technology, top-rate equipments and structure integrity.
In recent years, Silk Roadsticks to the talent-employment standard of Capable, Tough and Reliable and upholds the enterprise spirit of Flexible, Efficient, and Confident. Focusing on technology and industry innovation and centering product and market restructuring, the group have already planned a "4211" development strategy.
In 2005, cooperating with Xi'an Jiaotong University compressor research institute and interlinking with the state 863 project, the group successfully developed a high-tech product: screw air compressor's core part : screw rotors . It marks the end of relying on import this unit from overseas only in China. The success has made Silk Road the first in the industry which owns the intellectual property, core technique and competitive advantage among large-scale equipment manufacturers in China. In 2006, Silk Road was awarded with a second-class outstanding technique invention award by Chinese government for this technology.
Upon the success, we are currently trying to list one of our subordinate company: Silk Road to the share market. Also, we are hoping to develop Silk Road into a large-scale and diversified manufacturer with its own patent core technique and core competitiveness. We are striving to rejuvenate our national industry and develop as the pillar of Chinese air compressor industry in a yearning for greater contribution to China's harmonious society construction and national equipment manufacturing industry development.