DTH Hammer Bits HARGRAND Hot Sale! Down The Hole

Specifications

1. good alloy steel material
2. long durability
3. perfect abrasive resistance
4.ISO9001:2008

Specifications

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