8 inch dth bit water hole:three match hammer:340,350,360,380 Long service life ISO certificate

8 inch dth bit

DTH drill bit is our company main product.After mang years search,we have rich experience in development and manufacture which adopted high-quality raw materials, advanced craft technology and passed through strictly inspection, manufacturing high quality products.

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DTH Bit

No.	type	inch		Air holes	Gauge	Front	spline	weight kg	Match hammer	Notes
		mm	inch
1	ZRQ-89-T45	89	3 1/2	4	7×φ13	5×φ12		3.2		T45Thread
2	ZRQ-102-T45	102	4	4	8×φ14	6×φ13		5.0		T45Thread
3	ZRQ -90L	90	3 1/2	2	6×φ14	2×φ12 2×φ13	6	3.9	ZRC90 ZRC930
4	ZRQ -100L	100	3 7/8	3	6×φ14	3×φ122×φ13	6	4.5
5	ZRQ -110L	110	4 3/8	3	6×φ14	4×φ123×φ13	6	4.8
6	ZRQ-110	110	4 3/8	2	7×φ14	6×φ13	6	5.8	ZRC110
7	ZRQ-90	90	3 1/2	2	7×φ14	6×φ12	8	4.8	ZRC90GDHD3.5 COP34
8	ZRQ-115	115	4 1/2	2	8×φ14	6×φ13	8	9.0	ZRC340DHD340COP44
9	ZRQ-115C	115	4 1/2	2	7×φ16	6×φ13	8	9.0
10	ZRQ-140	140	5 1/2	2	7×φ18	7×φ14	8	16.2	ZRC350DHD350COP54
11	ZRQ-152B	152	6	2	8×φ18	8×φ14	8	16.2
12	ZRQ-152	152	6	2	8×φ16	4×φ144×φ16	8	22.5	ZRC360DHD360COP64
13	ZRQ-165	165	6 1/2	2	8×φ16	11×φ16	8	24.7
14	ZRQ-165A	165	6 1/2	2	8×φ18	8×φ16	8	24.7
15	ZRQ-178	178	7	2	9×φ18	10×φ16	8	25.3
16	ZRQ-203	203	8	3	9×φ18	11×φ16	8	30.5
17	ZRQ -203A	203	8	3	9×φ18	4×φ166×φ18	8	30.5