SD12 305mm, 311mm, 330mm, 356mm, 381mm DTH Drill Bits

About us
We are a leading manufacturer of rock drilling tools, like DTH hammers and bits, DTH drill pipes, RC hammers and bits, tophammer button bits, coupling, cross bits, drill rods located in Changsha, Hunan, China.
We have rich experience in this field of DTH hammers and bits for 20 years.
Owing to high quality, professional serivce and competitive price, we have gotten good reputation from our customers from all over the world, such as France, Spain, Italy, South Africa, Iran, Malaysia, Australia ad etc.

Product specifications     

For 12" hammer   DTH bits shank	Bit Dia.		No Air Holes.	Gauge Buttons	Front Buttons	Weight (Kg)	Part No.
	mm	inch
DHD1120	305	12"	4	12×φ18	36×φ16	152.0	DHD1120-305
	311	12 1/4"	4	12×φ18	36×φ16	157.0	DHD1120-311
	330	13"	4	16×φ18	42×φ16	165.0	DHD1120-330
	356	14"	4	16×φ19	48×φ16	178.0	DHD1120-356
	381	15"	4	16×φ19	48×φ18	198.0	DHD1120-381
SD12	305	12"	4	12×φ18	36×φ16	156.0	SD12-305
	311	12 1/4"	4	12×φ18	36×φ16	168.0	SD12-311
	330	13"	4	16×φ18	42×φ16	180.0	SD12-330
	356	14"	4	16×φ19	48×φ16	191.0	SD12-356
	381	15"	4	16×φ19	48×φ18	200.0	SD12-381
NUMA120	305	12"	4	12×φ18	36×φ16	152.0	NUMA120-305
	311	12 1/4"	4	12×φ18	36×φ16	158.0	NUMA120-311
	330	13"	4	16×φ18	42×φ16	165.0	NUMA120-330
	356	14"	4	16×φ19	48×φ16	178.0	NUMA120-356
	381	15"	4	16×φ19	48×φ18	195.0	NUMA120-381
NUMA125	305	12"	4	12×φ18	36×φ16	170.0	NUMA125-305
	311	12 1/4"	4	12×φ18	36×φ16	173.0	NUMA125-311
	330	13"	4	16×φ18	42×φ16	182.0	NUMA125-330
	356	14"	4	16×φ19	48×φ16	191.0	NUMA125-356
	381	15"	4	16×φ19	48×φ18	200.0	NUMA125-381

Shank can be available:
1), Dia. 64mm-70mm shank Bulroc BR1
2), Dia. 70mm-95mm shank Halco MACH20, Bulroc BR2
3), Dia. 90mm-102mm shank COP32, COP34, Halco MACH303, M30, DHD3.5, Bulroc BR3
4), Dia. 105mm-152mm shank COP44, DHD340, Halco MACH44, SD4, M40, QL40, Bulroc BR4
5), Dia. 135mm-165mm shank COP54, DHD350R, COP54, Halco MACH50, SD5, M50, QL50, Bulroc BR5
6), Dia. 152mm-254mm shank COP64, DHD360, SD6, M60, QL60, Bulroc BR6
7), Dia. 203mm-330mm shank COP84, DHD380, SD8, QL80
8), Dia. 254mm-380mm shank SD10, Numa100
9), Dia. 305mm-508mm shank DHD1120, SD12, N120, N125
10), Dia. 405mm-864mm shank SD15, SD18
11), VKP80, VKP95, CIR90, CIR100, CIR110, CIR150, CIR200...

We can also provide related products DTH hammers, ODEX system, symmetrix systems, slide block drilling systems, etc and DTH drilling pipes for various thread API REG, API IF, BECO, etc

Product photos 

Quality warranty
Our products are made of high quality steel and all spares parts are inspected strictly before shipping. We have quickly responses for your complaint and suggestion.

Package
Using ply-wooden cases and pallet for package to protect the products and avoid the damagement during transportation. Also we can customize package according to your special requests.


Production time
Generally need 15-25 days

Transportation
By air, By Express or By sea according to your requests.