Tubeless Down-The-Hole Drill Bits

• Customization: Available
• Type: Core Drill Bit
• Material: Diamond
• Model NO.: 4-inch tubeless drill bit 105
• Usage: Well Drilling
• Origin: China
• HS Code: 8207199000
• Production Capacity: 10000PCS Per Year
• Package Size: 30.00cm * 4.50cm * 4.50cm
• Package Gross Weight: 58.000kg

Product Description

The characteristics of down-the-hole drills:
1. High-quality forging process enhances the fatigue strength of the drill bit body;

2. Select high-quality hard alloy and appropriate size to ensure the stability of the alloy life of the drill bit.

3. The excellent toothing process ensures that the alloy teeth of the drill bit do not fall off during normal use.

4. Advanced heat treatment equipment and processes ensure the stability of the performance of the drill bit body.

5. Specialized tooth surface design, structural design and specific processing techniques are adopted for drill bits of different rock strata to ensure the service life of the drill bits.

Types of tubeless down-the-hole drill bits								tailpipe down-the-hole drill bits										Reverse cycle drill bit
No.	L	Φ	splines number	range	Common drill bits	Corresponding model		No.	L	Φ	L1	Φ1	splines number	range	Common drill bits	Corresponding model		No.	L	φ1	B1	B2	φd1	φd2	splines number	range	Common diameter
JS4L	279.5	68	10	105-130	115	QL40		JH4S	260	67	54	26	8	105-130	115	SD4		0#	225	78	14.3	14.6	77	68.2	8	115-130	115
JS5L	240	88.5	12	135-152	140	QL50		JH5S	258	82.5	54.5	32	8	135-152	140	SD5		2#	225	84	14.25	14.55	79.4	69.2	8	121-140	124
JS6L	253	106	12	155-190	165,178	QL60		JH6S	324	102	53	36.4	8	155-190	165,178	SD6		4#	277	87	15.9	16.5	86.8	71.5	8	127-145	133
JS8L	331	136	16	203-254	203,216, 240	QL80		JH8S	321	118	57	41	8	203-254	203, 216,240	SD8		5#	260.5	95.2	18.8	19.5	95	80	8	140-155	140
JS3.5D	181	54.6	8	90-110	105	DHD3.5		JH10S	355.8	164.5	60.3	56	8	245-305	254,305	SD10
JS4H	209	65	8	105-130	115	DHD340		JH12S	470	185.5	48	63.5	8	305-400	305,311	SD12
JS5H	260	84	8	135-152	140	DHD350		JH4L	279.5	68	59	32	10	105-130	115	QL40
JS6H	308	101.5	8	155-190	165,178	DHD360		JH5L	240	88.5	52	38.5	12	135-152	140	QL50
JS8H	350	128.5	10	203-254	203,216, 240	DHD380		JH6L	253	106	59	46	12	155-190	165,178	QL60
JS10N	375	165	10	245-305	245/305	NUMA100		JH8L	331	136	54	54.6	16	203-254	203,216,240	QL80
JS4M	228	68	12	105-130	115	MISSI on 40		JH3.5D	181	54.6	54.6	24.5	8	90-110	105	DHD3.5
JS5M	260	82.5	12	135-165	140	MISSI on 50		JH4	209	65	59	27	8	105-130	115	DHD340
JS6M	231	106.5	12	155-203	165,178	MISSI on 60		JH5	260	84	56	35	8	135-152	140	DHD350
JS8M	329	128.5	12	203-254	203,216, 240	MISSI on 80		JH6	308	101.5	55	38	8	155-190	165,178	DHD360
								JH8	350	128.5	51	50.6	10	203-254	203, 216,240	DHD380
								JH12	490	183	52	63.5	8	305-400	305,311	DHD112
								Large-diameter drill bit
								TK12	490.5	191	56.5	75.6	12	305-400	311
								TK14	520	235			10	400-508	500
								TK18	527.5	183	80.7	63.45	12	500-650	600
								TK24	560	380	80	120	14	650-800	800
								TK28	476	464.5	77	114	16	800-1000	1000