1. good alloy steel material
2. long durability
3. perfect abrasive resistance
4.ISO9001:2008
HARGRAND Efficient High Pressure DTH Bits
Certificate:ISO9001:2008
Fast drilling speed, low air consumption
High penetration
Product Name: HARGRAND Efficient High Pressure DTH Bits
Products Features:
Hargrand of the HD series is known for excellent quality drill bit. We can not only provide customers a full range of high quality Hargrand carbide drill and drilling systems, while helping users to select the most appropriate to their best working conditions, rock drill to help users analyze the causes and solutions; we can provide for free use of the drill and drilling a series of training to help customers achieve high efficiency, low cost solution for a comprehensive drilling.
Products Scope:
The right choice bit models, can reduce operating costs, and improves productivity. The following instructions will help you choose the right bit. | ||
Face | Button | Applications |
Soft materials which are less than 15,000 psi (1033.5 bar) compressive strength. The material should also be consolidated and homogeneous with a low abrasiveness. l Soft limestone l Shale l Slate | ||
Medium hard materials which are 15,000 - 25,000 psi (1033.5 - 1722.5 bar) compressive strength. The material should be consolidated and homogenousl Hard limestonel l Granitel l Sandstonel l Dioritel l Schistl l Marble | ||
Medium-soft to medium-hard materials which are 15,000 - 30,000 psi (1033.5 - 2067 bar) compressive strength. Material can be voided, fractured, unconsolidated and faulted. Face slots provide good hole cleaning in fast drilling applications. l Hard limestone l Granite l Sandstone l Diorite l Schist l Marble | ||
Medium-hard to hard materials which are greater than 30,000 psi(2067 bar). Materials should be consolidated but a certain level of voids and fractures are acceptable. The flat face design has the strongest head. l Granite l Gabbro |
Type and Technical Specification of bits for high efficiency high pressure DTH Hammers
Type | Number of Air hole | Dia.(mm) | Weight(kg) | Gauge Button | Front Button | Matching DTH Hammer |
HD440-115 | 2 | 110-113 | 8 | 7*14 | 6*12 | HD440 |
HD440-130 | 2 | 130-133 | 12 | 7*14 | 8*12 | |
HD450-130 | 2 | 130-133 | 15 | 6*13 | 3*12 | HD450 |
HD450-140 | 2 | 140-143 | 15.4 | 6*13 | 6*12 | |
HD450-152 | 2 | 152-155 | 19 | 8*14 | 7*13 | |
HD460-165 | 2 | 165-170 | 25 | 8*14 | 7*13 | HD460 |
HD460-178 | 2 | 178-181 | 27 | 8*14 | 8*13 | |
HD480-203 | 2 | 203-206 | 48 | 7*16 | 7*14 | HD480 |
HD480-216 | 2 | 216-219 | 50 | 7*16 | 7*14 | |
HD480-254 | 3 | 254-257 | 58 | 6*16 | 6*14 |