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Home >> Diamond core bits >> Surface set diamond core bits

Surface set diamond core bits are featured with several layers of natural diamond normally on the active places of the bit crown on a particular predetermined pattern. Unlike the impregnated diamond type, these surface set diamond core bits are usually made in patterned crown making it ideal for drilling formations from soft to hard. These type of diamond grits are normally mounted on a bit crown-powdered metal matrix body that’s anchored to a robust steel body. Because of the diamond unique characteristics, S.S core bits offer super-fast drilling efficiently for long hours. Most impregnated diamond core bit which its powdered metal bit can expose new diamond crystals because of uncontrolled erosion, while surface set diamond core bit crowns feature a toughened metal bond matrix making it robust, resilient and tough. Actually, the true function of the bit crown metal matrix body on this type of surface set diamond core bits is to securely hold the diamonds in the right place throughout their operational lifetime.

AQ surface set diamond core bits HQ surface set diamond core bits HQ3 surface set diamond core bits NQ3 surface set diamond core bits
AQ surface set diamond core bits HQ surface set diamond core bits HQ3 surface set diamond core bits NQ3 surface set diamond core bits
NQ surface set diamond core bits NMLC surface set diamond core bits    
NQ surface set diamond core bits NMLC surface set diamond core bits    

The strength of the surface set diamond type comes straight from the mold, which is normally subjected to extreme thermal treatment, hence ensuring metallurgical bond of the matrix on the steel body. Surface set Natural diamond core bits are manufactured for use in drilling abrasive, soft and unconsolidated formations that will be more efficient than impregnated diamond core bits. Nevertheless, they can also be used to drill harder formations whenever there is lack of enough rotational speeds. In most cases, surface set diamond core bit crown close up providing a high rate of penetration in drilling formations of soft, medium and relatively high hardness. But because the surface set diamond core bits are made with diamond crystals exposed on seven steps, they’ll perform a lower bit life than impregnated diamond core bits.

the harder of rocks, the smaller diamond size to choose
Diamond grit size Formation Drilled  
10/20 SPC Soft formation A grade
20/30 SPC soft to medium formation AA grade
30/40 SPC medium formation  
40/60 SPC (natural diamond) Medium to hard formation  
< 60/80 SPC Very hard formation AAA grade

Surface set core bits consist of large diamond particles, carbide powder and steel body. As aforementioned, when these are molded together to form diamond layers toughened matrix, the result is highly versatile diamond core bits which can be used to drill different formations.

Because diamonds can be used to make drill bits with complex shapes, surface set diamond core bits are quite versatile. The bit crown which the diamonds are attached to, helps in keeping the diamonds in position throughout the operational life of the bit. In abrasive type formations such as in waterways, Tungsten carbide (TC) is inserted to prevent the corrosion of the matrix. When surface set diamond core bits are manufactured, they come with different crown types and different sizes of natural diamonds to suit any formation.

Adavantages of surface set diamond core bits:

· Maximum Penetration – As mentioned earlier, due to the robust nature and resilient nature of surface set diamond core bits, they can produce optimal performance giving out maximum penetration. This is because of the greater degree of exposure of individual diamond grits.

· High Quality – Not only are the diamonds tough, the thermally treated metal matrix is of high quality which boosts the functionality of these surface set diamond core bits.

· Diversity – The surface set diamond core bits can be used for both soft and hard formations. However, higher rotational speeds will be needed in the case of harder formations. They are sharp enough to drill hard rocks.

· Longevity – The durability of the core bits cannot be underestimated. So long as they’re used as it is supposed to be, they can last for significant amount of time without causing any problem.

· Versatility – These diamond core bits can be customized to suit the needs of a particular client. The range one could get include variety of diamond grades, mesh sizes, matrix profiles, and we offer a cost effective solution for mining.

The surface set diamond core bits are best and cost effective alternative to impregnated diamond core bits while still offering great penetration and lifespan. You can either get multi-step profile or a semi-rounded profile, also you can specify diamond size of 20/30,40/60 and diamond grade, number of waterway, number of steps, junk slots, heavy duty gauge protection etc. When search for high quality surface set core bits, remember to liaise with a professional company so that you can get exactly what you want.

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We export impregnated and surface set diamond core bits, diamond casing and casing shoe bits, reaming shells, core barrels, drilling rods, overshots to world wide countries, such as USA united states, Germany, UK united kingdom, Italy, France, Turkey, Russia, Ukraine, Canada, South Africa, Philippines, Cambodia, Thailand, Malaysia, Australia, New Zealand, South Korea, Japan, Israel, Cyprus, Finland, Sweden, Norway, Danmark, Poland, Czech, Hungary, Switzerland, Ireland, Holand, Greece, Croatia, Spain, Portugal, Egypt, India, Singapore, Indonesia, Saudi Arabia, United Arab Emirates, Mexico, Brazil, Colombia, Peru, Chile, Argentina etc.

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