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JOSYM |
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Concentric Overburden Drilling System |
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You can pull out the pilot bit by rotating the rod, clockwise in case
of drifter |
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and anti-clockwise in case of DTH Hammer, and continue to drill
through |
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the ringbit with a conventional bit in solid formation. |
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For Drifter(=Top Hammer) |
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Assembled Set |
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Click for the components |
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DIMENSIONS |
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Model |
Casing OD |
Max Casing Thickness |
Ring Bit OD |
Ring Bit ID |
Pilot Bit OD |
Drifter Thread |
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JOSYM 54D |
76.2mm |
6mm |
85mm |
54mm |
53mm |
T25,T32 |
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JOSYM 68D |
89.1mm |
6mm |
98mm |
68mm |
67mm |
T32 |
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JOSYM 74D |
101.6mm |
5.6mm |
109mm |
74mm |
72mm |
T32,T38 |
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JOSYM 80D |
114.3mm |
8mm |
123mm |
80mm |
78mm |
T32,T38 |
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JOSYM 105D |
133.4mm |
8mm |
142mm |
105mm |
103mm |
T38,T45 |
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JOSYM 109D |
139.7mm |
6.6mm |
149mm |
109mm |
107mm |
T45,T51 |
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JOSYM 116D |
152.4mm |
10mm |
162mm |
116mm |
114mm |
T51,T68 |
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JOSYM 127D |
168.3mm |
10mm |
178mm |
127mm |
125mm |
T51,T68 |
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In accordance with our policy of
constant improvement of the products, we reserve the right to amend design,
materials and specifications at any time without notice. |
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For DTH Hammer |
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