Active Member
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[China]
Address: NO.1318,Huanghe North Road, Tianuan District,Zhuzhou City,Hunan Province,P.R.China 412000
Contact name:Linda Luo
ZhuZhou Better Tungsten Carbide Co., Ltd |
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130 Mm High Air Pressure Dth Down The Hole Drill Bit With Foot Valve
ZZbetter DTH bits use high quality cemented carbide buttons, which are designed to drill further. The drill bit bodies are made from precision hardened nickel molybdenum steel, with a compound curve shape for faster and smoother cutting and easier removal of cuttings.
The bits in the new range have an optimized head length with maximized steel support for the cemented carbide buttons, deep face grooves for excellent flushing and an aggressive cutting structure.
Advantages
Proprietary tungsten carbide ensures high quality and performance
Carbide grade options for long life in challenging applications
Face designs to maximize penetration rate and tool life
Optimized flushing designs to aid in cuttings removal and reduce wear
General type of DTH drills
| Type of face | Application |
| Concave Face | For medium soft to medium hard rock conditions in consolidated ground conditions in medium abrasivity rock. Front face grooves provide excellent cuttings removal and the concave center provides optimal hole straightness. The concave design is the most common bit shape. |
| Convex Face | For medium sotf to medium hard rock in good ground conditions where maximum penetration rate is desired. The convex design will handle abrasive formations better than a concave or flat design. The convex design also enables the use of greater insert density for aggressive spherical, conical or ballistic tipped bits. |
| Flat Face | For hard rock formations where a very durable head is required. The flat face design is very stable and forgiving in fractured, voided or unconsolidated formations. The flat face design also handles abrasive formations well. Some models are available with face slots for improved hole cleaning. |
| Oilfield Face | A combination of convex and concave designs, the oilfield head design provides the benefits of both in all applications. The second gage row shares the high loads on the gage inserts preserving life and reducing wear. The center cone provides stability and straightness. |
