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Current Location： Home » Down The Hole Drilling » 4"High air pressure DTH Bits

4 inch high air pressure down-the-hole drill bit

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    • Product Features
    There are four main types of end face design forms currently used in high air pressure down-the-hole drill bits: end face convex type, end face plane type, end face concave type and end face deep concave center type. Tungsten carbide is mostly used in the distribution method of ball teeth, spring teeth or ball teeth and spring teeth.
    1. End face convex type: This drill bit is divided into two forms, single boss and double boss end face, the latter is mainly used for down-the-hole drill bits with larger diameters. The end-face convex down-the-hole drill bit can maintain a high drilling rate when drilling hard and hard abrasive rocks, but the straightness of the borehole is poor, and it is not suitable for rock drilling projects with high requirements for blast hole straightness.
    2. End face plane type: this shape of the drill bit is relatively strong and durable, suitable for drilling hard and extremely hard rock, and also suitable for drilling and chiseling drill hole straightness requirements are not high for medium hard rock and soft rock.
    3. Plane type of end face: there is a conical concave part on the end face of this shape of the drill bit, which is the drill bit in the process of rock drilling to form a slight nucleation to maintain the centering performance of the drill bit, and the drill hole has a good straightness, this kind of drill bit has a good powder discharge effect, fast drilling speed, and is the most used down-the-hole drill bit on the market at present.
    4. Deep concave center type of end face: This shape of the drill bit is evolved from the same type of ball tooth drill bit, and the center of the end face of the drill bit has a deep concave center part. It is used for nucleation in the process of rock drilling, and ensures the straightness of the blast hole when drilling deep holes, and is only suitable for drilling soft rock and medium hard rock.

    高风压潜孔钻头 High air pressure DTH Bits
    4" 钻头直径
    Diameter    		 合金数量×直径
    No×button diameter    		 气孔
    Air hoies    		 重量
    Weight
    (kg)    		 P/N
    毫米
    mm    		 英寸
    inch    		 芯齿
    Front    		 边齿
    Gauge
    圆齿/凹面型 Spherical button/Goncave face
    115
    121
    127
    130
    133    		 4 1/2
    4 3/4
    5
    5 1/8
    5 1/4    		 4×14，2×14
    4×14，2×14
    4×14，3×14
    4×14，3×14
    4×14，4×14    		 8×14
    8×14
    8×14
    8×16
    8×16    		 2
    2
    2
    2
    2    		 10.0
    11.0
    12.0
    14.0
    15.0    		 613-115QL40-614/814-22-41
    613-121QL40-614/814-22-41
    613-127QL40-714/814-22-41
    613-130QL40-714/816-22-41
    613-133QL40-814/816-22-41
    抛物线齿/凸面型 Parabolic button/Convex face
    110
    115
    121
    127
    130
    133    		 4 3/8
    4 1/2
    4 3/4
    5
    5 1/8
    5 1/4    		 4×14，2×14
    4×14，2×14
    4×14，2×14
    4×14，3×14
    4×14，3×14
    4×14，3×14    		 8×14
    8×14
    8×14
    8×14
    8×16
    8×16    		 2
    2
    2
    2
    2
    2    		 9.3
    10.0
    11.0
    12.0
    14.0
    15.0    		 614-110QL40-614/814-22-51
    614-115QL40-614/814-22-51
    614-121QL40-614/814-22-51
    614-127QL40-714/814-22-51
    614-130QL40-714/816-22-51
    614-133QL40-814/816-22-51
    圆齿/平面型 Spherical button/Flat face
    110
    115
    121
    127
    130
    133    		 4 3/8
    4 1/2
    4 3/4
    5
    5 1/8
    5 1/4    		 6×14
    6×14
    6×14
    7×14
    7×14
    7×14    		 8×14
    8×14
    8×14
    8×14
    8×16
    8×16    		 2
    2
    2
    2
    2
    2    		 10.0
    10.3
    10.6
    11.5
    12.0
    12.6    		 611-110QL40-614/814-22-41
    611-115QL40-614/814-22-41
    611-121QL40-614/814-22-41
    611-127QL40-714/814-22-41
    611-130QL40-714/816-22-41
    611-133QL40-814/816-22-41
    抛物线齿/凸面型 Parabolic button/Concave face
    115
    121
    127
    130    		 4 1/2
    4 3/4
    5
    5 1/8    		 4×14，2×14
    4×14，2×14
    4×14，3×14
    4×14，3×14    		 8×14
    8×14
    8×14
    8×16    		 2
    2
    2
    2    		 6.8
    7.4
    7.6
    8.0    		 613-115M40-614/814-22-51
    613-121M40-614/814-22-51
    613-127M40-714/814-22-51
    613-130M40-714/816-22-51
    圆齿/凹面型 Spherical button/Concave face
    115
    121
    127
    130
    133    		 4 1/2
    4 3/4
    5
    5 1/8
    5 1/4    		 4×14，2×14
    4×14，2×14
    4×14，3×14
    4×14，3×14
    4×14，4×14    		 8×14
    8×14
    8×14
    8×16
    8×16    		 2
    2
    2
    2
    2    		 6.8
    7.4
    7.6
    8.0
    8.3    		 613-115M40-614/814-22-41
    613-121M40-614/814-22-41
    613-127M40-714/814-22-41
    613-130M40-714/816-22-41
    613-133M40-814/816-22-41
    抛物线齿/凸面型 Parabolic button/Convex face
    110
    115
    121
    127
    130
    133    		 4 3/8
    4 1/2
    4 3/4
    5
    5 1/8
    5 1/4    		 4×14，2×14
    4×14，2×14
    4×14，2×14
    4×14，3×14
    4×14，3×14
    4×14，4×14    		 8×14
    8×14
    8×14
    8×14
    8×16
    8×16    		 2
    2
    2
    2
    2
    2    		 6.4
    6.8
    7.4
    7.6
    8.0
    8.3    		 614-110M40-614/814-22-51
    614-115M40-614/814-22-51
    614-121M40-614/814-22-51
    614-127M40-714/814-22-51
    614-130M40-714/816-22-51
    614-133M40-814/816-22-51
    圆齿/平面型 Spherical button/Flat face
    110
    115
    121
    127
    130
    133    		 4 3/8
    4 1/2
    4 3/4
    5
    5 1/8
    5 1/4    		 6×14
    6×14
    6×14
    7×14
    7×14
    7×14    		 8×14
    8×14
    8×14
    8×14
    8×16
    8×16    		 2
    2
    2
    2
    2
    2    		 6.4
    6.8
    7.4
    7.6
    8.0
    8.3    		 611-110M40-614/814-22-41
    611-115M40-614/814-22-41
    611-121M40-614/814-22-41
    611-127M40-714/814-22-41
    611-130M40-714/816-22-41
    611-133M40-814/816-22-41
    4" 钻头直径
    Diameter    		 合金数量×直径
    No×button diameter    		 气孔
    Air hoies    		 重量
    Weight
    (kg)    		 P/N
    毫米
    mm    		 英寸
    inch    		 芯齿
    Front    		 边齿
    Gauge
    抛物线齿/凹面型 Parabolic button/Concave face
    115
    121
    127
    130    		 4 1/2
    4 3/4
    5
    5 1/8    		 4×14，2×14
    4×14，2×14
    4×14，3×14
    4×14，3×14    		 8×14
    8×14
    8×14
    8×16    		 2
    2
    2
    2    		 10.0
    11.0
    12.0
    14.0    		 613-115D340-614/814-22-51
    613-121D340-614/814-22-51
    613-127D340-614/814-22-51
    613-130D340-614/816-22-51
    圆齿/凹面型 Spherical button/Concave face
    115
    121
    127
    130
    133    		 4 1/2
    4 3/4
    5
    5 1/8
    5 1/4    		 4×14，2×14
    4×14，2×14
    4×14，3×14
    4×14，3×14
    4×14，3×14    		 8×14
    8×14
    8×14
    8×16
    8×16    		 2
    2
    2
    2
    2    		 10.0
    11.0
    12.0
    14.0
    15.0    		 613-115D340-614/814-22-41
    613-121D340-614/814-22-41
    613-127D340-714/814-22-41
    613-130D340-714/816-22-41
    613-133D340-714/816-22-41
    抛物线齿/凸面型 Parabolic button/Convex face
    110
    115
    121
    127
    130
    133    		 4 3/8
    4 1/2
    4 3/4
    5
    5 1/8
    5 1/4    		 4×14，2×14
    4×14，2×14
    4×14，2×14
    4×14，3×14
    4×14，3×14
    4×14，3×14    		 8×14
    8×14
    8×14
    8×14
    8×16
    8×16    		 2
    2
    2
    2
    2
    2    		 9.3
    10.0
    11.0
    12.0
    14.0
    15.0    		 614-110D340-614/814-22-51
    614-115D340-614/814-22-51
    614-121D340-614/814-22-51
    614-127D340-714/814-22-51
    614-130D340-714/816-22-51
    614-133D340-714/816-22-51
    圆齿/平面型 Spherical button/Flat face
    110
    115
    121
    127
    130
    133    		 4 3/8
    4 1/2
    4 3/4
    5
    5 1/8
    5 1/4    		 6×14
    6×14
    6×14
    7×14
    7×14
    7×14    		 8×14
    8×14
    8×14
    8×14
    8×16
    8×16    		 2
    2
    2
    2
    2
    2    		 9.3
    10.0
    11.0
    12.0
    14.0
    15.0    		 611-110D340-614/814-22-41
    611-115D340-614/814-22-41
    611-121D340-614/814-22-41
    611-127D340-714/814-22-41
    611-130D340-714/816-22-41
    611-133D340-714/816-22-41
    圆齿/凹面型 Spherical button/Concave face
    115
    121
    127
    130    		 4 1/2
    4 3/4
    5
    5 1/8    		 4×14,2×14
    4×14,2×14
    4×14,3×14
    4×14,3×14    		 8×14
    8×14
    8×14
    8×16    		 2
    2
    2
    2    		 9.8
    11.5
    12.3
    14.3    		 613-115SD4-614/814-22-51
    613-121SD4-614/814-22-51
    613-127SD4-714/814-22-51
    613-130SD4-714/816-22-51
    抛物线齿/凸面型 Parabolic button/Convex face
    110
    115
    121
    127
    130
    133    		 4 3/8
    4 1/2
    4 3/4
    5
    5 1/8
    5 1/4    		 4×14,2×14
    4×14,2×14
    4×14,2×14
    4×14,3×14
    4×14,3×14
    4×14,3×14    		 8×14
    8×14
    8×14
    8×14
    8×16
    8×16    		 2
    2
    2
    2
    2
    2    		 9.5
    9.8
    11.5
    12.3
    14.3
    15.3    		 614-110SD4-614/814-22-51
    614-115SD4-614/814-22-51
    614-121SD4-614/814-22-51
    614-127SD4-714/814-22-51
    614-130SD4-714/816-22-51
    614-133SD4-714/816-22-51
    圆齿/平面型 Spherical button/Flat face
    110
    115
    121
    127
    130
    133    		 4 3/8
    4 1/2
    4 3/4
    5
    5 1/8
    5 1/4    		 6×14
    6×14
    6×14
    7×14
    7×14
    7×14    		 8×14
    8×14
    8×14
    8×14
    8×16
    8×16    		 2
    2
    2
    2
    2
    2    		 9.5
    9.8
    11.5
    12.3
    14.3
    15.3    		 611-110SD4-614/814-22-41
    611-115SD4-614/814-22-41
    611-121SD4-614/814-22-41
    611-127SD4-714/814-22-41
    611-130SD4-714/816-22-41
    611-133SD4-714/816-22-41

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