DHD Series Bit

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DHD Series Bit

1、High-Performance Design: The DHD series features a high-performance design, optimized for efficient and accurate drilling operations in various engineering applications.

2、Durability & Reliability: Constructed from high-strength materials, these drill bits offer excellent durability and reliability, resisting wear and impact damage even in tough conditions.

3、Versatility: The DHD series is highly versatile, suitable for use in different types of rocks and soil, allowing for flexibility in various engineering projects.

4、Enhanced Drilling Efficiency: With its advanced design and precision engineering, the DHD series drill bits improve drilling efficiency, reducing time and effort required for drilling operations.

The Role of the Tail Pipe in DHD Series Down-the-Hole Drill Bits

Guidance and Positioning: As part of the drill bit, the tail pipe serves as a guide, ensuring that the drill bit accurately follows the predetermined path during the drilling process, reducing deviations, and improving drilling accuracy.

Discharge and Drainage: The tail pipe helps to discharge debris, mud, and other impurities generated during the drilling process, keeping the drill hole clean and enhancing drilling efficiency. Additionally, the tail pipe guides the coolant or flushing fluid into the drill bit, ensuring its normal operation and effective cooling.

DHD:	DHD3.5 DHD340 DHD350 DHD360 DHD380 DHD1120
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Model:
DHD3.5 DHD340 DHD350 DHD360 DHD380 DHD1120
Brand:
QIDELI
Code:
QDL-DHD

Product Description

Advantages and characteristics

1. Strict supplier quality management, the use of high-quality steel and hard alloy, warhead service life is long.

2. Using high-quality raw materials and advanced processing techniques for superior performance.

3. The head shape distribution is scientific and diverse, which can complete the construction work of the whole terrain and all directions.

4. Manufacturers direct sales, according to your actual work situation to provide you with a more suitable bit structure.

5. 20 years of profound production experience, ensuring reliable quality.Exported to over 40 countries, highly recognized internationally.

6. A customer repurchase rate of up to 98%, a trusted choice.

钻头规格 Specification		头部形状 Head shap	钻头头部直径(mm) Head Diamete	尾柄长度 Shank tenath	花键数 Spline	排气孔数量 Port holes	齿形 Button Type	边齿(mm) Gauge Buttons	芯齿(mm) Front buttons	重量(Kg) Weight
	HD25A	平面 Flat Face	76	174	6	2	弹头齿 Ballistic	6×Ø14	4×Ø11	3.2
		平面 Flat Face	80	174	6	2	弹头齿 Ballistic	6×Ø14	4×Ø11	3.3
		平面 Flat Face	85	174	6	2	弹头齿 Ballistic	6×Ø14	4×Ø12	3.4
		平面 Flat Face	90	174	6	2	弹头齿 Ballistic	6×Ø14	4×Ø12	3.6

钻头规格 Specification		头部形状 Head shap	钻头头部直径(mm) Head Diamete	尾柄长度 Shank tenath	花键数 Spline	排气孔数量 Port holes	齿形 Button Type	边齿(mm) Gauge Buttons	芯齿(mm) Front buttons	重量(Kg) Weight
	DHD3.5	平面 Flat Face	90	180	8	2	球齿+弹头齿 Spherical+Ballistic	6×Ø14	5×Ø12	4.7
		平面 Flat Face	95	180	8	2	球齿+弹头齿 Spherical+Ballistic	6×Ø14	5×Ø12	4.8
		平面 Flat Face	100	180	8	2	球齿+弹头齿 Spherical+Ballistic	6×Ø14	6×Ø12	4.9
		平面 Flat Face	108	180	8	2	球齿+弹头齿 Spherical+Ballistic	8×Ø13	6×Ø12	5.4

钻头规格 Specification		头部形状 Head shap	钻头头部直径(mm) Head Diamete	尾柄长度 Shank tenath	花键数 Spline	排气孔数量 Port holes	齿形 Button Type	边齿(mm) Gauge Buttons	芯齿(mm) Front buttons	重量(Kg) Weight
	DHD3.5A	平面 Flat Face	90	180	8	2	球齿+弹头齿 Spherical+Ballistic	6×Ø14	5×Ø12	4.7
		平面 Flat Face	95	180	8	2	球齿+弹头齿 Spherical+Ballistic	6×Ø14	5×Ø12	4.8
		平面 Flat Face	100	180	8	2	球齿+弹头齿 Spherical+Ballistic	6×Ø14	6×Ø12	4.9
		平面 Flat Face	108	180	8	2	球齿+弹头齿 Spherical+Ballistic	8×Ø13	6×Ø12	5.4

钻头规格 Specification		头部形状 Head shap	钻头头部直径(mm) Head Diamete	尾柄长度 Shank tenath	花键数 Spline	排气孔数量 Port holes	齿形 Button Type	边齿(mm) Gauge Buttons	芯齿(mm) Front buttons	重量(Kg) Weight
	DHD340	凸面 Convex Face	108	209	8	2	球齿+弹头齿 Spherical+Ballistic	7×Ø16	6×Ø14	7.85
		凸面 Convex Face	115	209	8	2	球齿+弹头齿 Spherical+Ballistic	7×Ø16	6×Ø14	8.22
		凸面 Convex Face	127	209	8	2	球齿+弹头齿 Spherical+Ballisti	8×Ø16	4×Ø14+3×Ø13	8.88
		凸面 Convex Face	130	209	8	2	球齿+弹头齿 Spherical+Ballisti	8×Ø16	4×Ø14+3×Ø13	9.15

钻头规格 Specification		头部形状 Head shap	钻头头部直径(mm) Head Diamete	尾柄长度 Shank tenath	花键数 Spline	排气孔数量 Port holes	齿形 Button Type	边齿(mm) Gauge Buttons	芯齿(mm) Front buttons	重量(Kg) Weight
	DHD340A	凸面 Convex Face	108	209	8	2	球齿+弹头齿 Spherical+Ballisti	7×Ø16	6×Ø14	7.85
		凸面 Convex Face	115	209	8	2	球齿+弹头齿 Spherical+Ballisti	7×Ø16	6×Ø14	8.22
		凸面 Convex Face	127	209	8	2	球齿+弹头齿 Spherical+Ballisti	8×Ø16	4×Ø14+3×Ø13	8.88
		凸面 Convex Face	130	209	8	2	球齿+弹头齿 Spherical+Ballisti	8×Ø16	4×Ø14+3×Ø13	9.15

钻头规格 Specification		头部形状 Head shap	钻头头部直径(mm) Head Diamete	尾柄长度 Shank tenath	花键数 Spline	排气孔数量 Port holes	齿形 Button Type	边齿(mm) Gauge Buttons	芯齿(mm) Front buttons	重量(Kg) Weight
	DHD350	凸面 Convex Face	140	260	8	2	球齿+弹头齿 Spherical+Ballisti	7×Ø18	4×Ø15+3×Ø14	15.8
		平面 Flat Face	146	260	8	2	球齿+弹头齿 Spherical+Ballisti	8×Ø18	8×Ø14	16.5
		平面 Flat Face	152	260	8	2	球齿+弹头齿 Spherical+Ballisti	8×Ø18	8×Ø14	17
		凹面 Concave Face	165	260	8	2	球齿 Spherical	8×Ø18	4×Ø16+4×Ø14	18.9
		凹面 Concave Face	178	260	8	2	球齿 Spherical	8×Ø18	6×Ø16+5×Ø14	20.4

钻头规格 Specification		头部形状 Head shap	钻头头部直径(mm) Head Diamete	尾柄长度 Shank tenath	花键数 Spline	排气孔数量 Port holes	齿形 Button Type	边齿(mm) Gauge Buttons	芯齿(mm) Front buttons	重量(Kg) Weight
	DHD350A	凸面 Convex Face	140	260	8	2	球齿+弹头齿 Spherical+Ballisti	7×Ø18	4×Ø15+3×Ø14	15.8
		平面 Flat Face	146	260	8	2	球齿+弹头齿 Spherical+Ballisti	8×Ø18	8×Ø14	16.5
		平面 Flat Face	152	260	8	2	球齿+弹头齿 Spherical+Ballisti	8×Ø18	8×Ø14	17
		凹面 Concave Face	165	260	8	2	球齿 Spherical	8×Ø18	4×Ø16+4×Ø14	18.9
		凹面 Concave Face	178	260	8	2	球齿 Spherical	8×Ø18	6×Ø16+5×Ø14	20.4

钻头规格 Specification		头部形状 Head shap	钻头头部直径(mm) Head Diamete	尾柄长度 Shank tenath	花键数 Spline	排气孔数量 Port holes	齿形 Button Type	边齿(mm) Gauge Buttons	芯齿(mm) Front buttons	重量(Kg) Weight
	DHD350S	凸面 Convex Face	127	260	8	2	球齿+弹头齿 Spherical+Ballistic	8×Ø18	6×Ø16	14.5
	DHD350S	凸面 Convex Face	130	260	8	3	球齿+弹头齿 Spherical+Ballistic	9×Ø16	6×Ø16+4×Ø14	14.7

钻头规格 Specification		头部形状 Head shap	钻头头部直径(mm) Head Diamete	尾柄长度 Shank tenath	花键数 Spline	排气孔数量 Port holes	齿形 Button Type	边齿(mm) Gauge Buttons	芯齿(mm) Front buttons	重量(Kg) Weight
	DHD360	凹面 Concave Face	154	308.5	8	2	球齿 Domed	8×Ø18	4×Ø16+4×Ø15	22.5
		平面 Flat Face	165	308.5	8	2	球齿 Domed	8×Ø18	8×Ø16	23.6
		凹面 Concave Face	171	308.5	8	2	球齿 Domed	8×Ø18	6×Ø16+4×Ø15	25.2
		凹面 Concave Face	178	308.5	8	2	球齿 Domed	8×Ø18	6×Ø16+5×Ø15	26.1
		凹面 Concave Face	190	308.5	8	3	球齿 Domed	9×Ø18	6×Ø16+5×Ø15	29
		凹面 Concave Face	203	308.5	8	2	球齿 Domed	10×Ø18	8×Ø16+6×Ø15	30.4

钻头规格 Specification		头部形状 Head shap	钻头头部直径(mm) Head Diamete	尾柄长度 Shank tenath	花键数 Spline	排气孔数量 Port holes	齿形 Button Type	边齿(mm) Gauge Buttons	芯齿(mm) Front buttons	重量(Kg) Weight
	DHD360A	凹面 Concave Face	154	308.5	8	2	球齿 Domed	8×Ø18	4×Ø16+4×Ø15	22.5
		平面 Flat Face)	165	308.5	8	2	球齿 Domed	8×Ø18	8×Ø16	23.6
		凹面 Concave Face	171	308.5	8	2	球齿 Domed	8×Ø18	6×Ø16+4×Ø15	25.2
		凹面 Concave Face	178	308.5	8	2	球齿 Domed	8×Ø18	6×Ø16+5×Ø15	26.1
		凹面 Concave Face	190	308.5	8	3	球齿 Domed	9×Ø18	6×Ø16+5×Ø15	29
		凹面 Concave Face	203	308.5	8	2	球齿 Domed	10×Ø18	8×Ø16+6×Ø15	30.4

钻头规格 Specification		头部形状 Head shap	钻头头部直径(mm) Head Diamete	尾柄长度 Shank tenath	花键数 Spline	排气孔数量 Port holes	齿形 Button Type	边齿(mm) Gauge Buttons	芯齿(mm) Front buttons	重量(Kg) Weight
	DHD380	凹面 Concave Face	203	350	10	2	球齿 Domed	10×Ø18	4×Ø18+10×Ø16	46.5
		凹面 Concave Face	216	350	10	2	球齿 Domed	10×Ø18	4×Ø18+10×Ø16	52.1
		凹面 Concave Face	230	350	10	2	球齿 Domed	12×Ø18	12×Ø18+6×Ø16	54.5
		凹面 Concave Face	235	350	10	2	球齿 Domed	12×Ø18	12×Ø18+8×Ø16	58.8
		凹面 Concave Face	254	350	10	2	球齿 Domed	12×Ø18	12×Ø18+10×Ø16	62.4
		凸面 Convex Face	275	350	10	2	球齿 Domed	12×Ø18	27×Ø16	69
		凸面 Convex Face	305	350	10	3	球齿 Domed	15×Ø18	35×Ø16	77.6

钻头规格 Specification		头部形状 Head shap	钻头头部直径(mm) Head Diamete	尾柄长度 Shank tenath	花键数 Spline	排气孔数量 Port holes	齿形 Button Type	边齿(mm) Gauge Buttons	芯齿(mm) Front buttons	重量(Kg) Weight
	DHD380A	凹面 Concave Face	203	350	10	2	球齿 Domed	10×Ø18	4×Ø18+10×Ø16	48.5
		凹面 Concave Face	216	350	10	2	球齿 Domed	10×Ø18	4×Ø18+10×Ø16	52.1
		凹面 Concave Face	230	350	10	2	球齿 Domed	12×Ø18	12×Ø18+6×Ø16	54.8
		凹面 Concave Face	235	350	10	2	球齿 Domed	12×Ø18	12×Ø18+8×Ø16	55.5
		凹面 Concave Face	254	350	10	2	球齿 Domed	12×Ø18	12×Ø18+10×Ø16	62.4
		凸凹面 Convex Concave Face	275	350	10	2	球齿 Domed	12×Ø18	8×Ø16+23×Ø16	69
		凸面（Convex Face）	305	350	10	3	球齿 Domed	15×Ø18	18×Ø16+23×Ø16	77.6

钻头规格 Specification		头部形状 Head shap	钻头头部直径(mm) Head Diamete	尾柄长度 Shank tenath	花键数 Spline	排气孔数量 Port holes	齿形 Button Type	边齿(mm) Gauge Buttons	芯齿(mm) Front buttons	重量(Kg) Weight
	DHD1120	凸凹面 Convex Concave Face	305	490	8	3	球齿 Domed	15×Ø20	27×Ø18+8×Ø16	141.3
		凸凹面 Convex Concave Face	311	490	8	3	球齿 Domed	15×Ø20	27×Ø18+8×Ø16	141.6
		凸凹面 Convex Concave Face	325	490	8	3	球齿 Domed	15×Ø20	27×Ø18+8×Ø16	164.3
		凸凹面 Convex Concave Face	350	490	8	4	球齿 Domed	16×Ø20	32×Ø18+13×Ø16	169.1
		凸凹面 Convex Concave Face	381	490	8	4	球齿 Domed	16×Ø20	36×Ø18+18×Ø16	183
		凸凹面 Convex Concave Face	400	490	8	4	球齿 Domed	16×Ø20	40×Ø18+28×Ø16	194
		凸凹面 Convex Concave Face	445	490	8	4	球齿 Domed	20×Ø20	48×Ø18+25×Ø16	225.7
		凸凹面 Convex Concave Face	500	490	8	4	球齿 Domed	24×Ø20	90×Ø18	331.2

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