DTH bit with foot valve

Categories: TIANHE Drill

Tags: DTH Bit

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1. Enhanced fatigue strength through advanced forging technology.
2. High quality carbide in optimal sizes for stable longevity.
3. Precision inlaying technology prevents carbide detachment.
4. State of the art heat treatment ensures superior hardness and wear resistance.
5. Tailored design and specialized processing for extended service life across various rock formations.

dhd shank

Model	Bit shank	L	Φ	L1	Φ1	Spline	Air hole	Rec. hole size(mm)
JH3.5D	DHD3.5	181	54.6	54.6	24.5	8	2	90-105
JH4H	DHD340	209	65	59	27	8	2	105-130
JH5H	DHD350	260	84	56	35	8	2	140-152
JH6H	DHD360	308	101.5	55	38	8	2	152-190
JH8H	DHD380	350	128.5	51	50.6	10	2	203-245
JK12H	DHD112	490	183	52.2	63.2	8	3	305-380

Model	Bit shank	L	Φ	L1	Φ1	Spline	Air hole	Rec. hole size(mm)
JH4S	SD4	260	67	54	26	8	2	105-130
JH5S	SD5	258	82.5	54.5	32	8	2	140-152
JH6S	SD6	324	102	53	36.4	8	2	152-190
JH8S	SD8	321	118	57	41	8	2	203-245
JH10S	SD10	355.8	164.5	60.3	56	8	3	245-305
JK12S	SD12	470	185.5	48	63.2	8	3	305-380

ql shank

Model	Bit shank	L	Φ	L1	Φ1	Spline	Air hole	Rec. hole size(mm)
JH4X	QLX40	209.5	69	58	32.2	12	2	105-130
JH5L	QL50	240	88.5	52	38.5	12	2	140-152
JH6L	QL60	253	106	59	46	12	2	152-190
JH8L	QL80	331	136	54	54.6	16	2	203-245
TK12L	QL120	492	208.5	52.2	71.5	12	3	305-380

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