Changsha Tianhe Drilling Tools and Machinery Co.,Ltd.
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Mission50-140mm (5.5 inch) Button Bit
Main specification: 3”,4”,5”,6”,8”,10”,12”,18”,32”
Match to bits with COP,DHD,SD,MISSION,QL,Numa shank
| Matched hammer diameter(inch) | Bit diameter | Air Holes | Gauge | Front | Weight/KG | Bit shank | |
| mm | inch | (Qty.×Dia.) | (Qty.×Dia.) | ||||
| 5” | 140 | 5 1/2 | 2 | 7*18 | 7*14 | 15.5 | DHD350/SD5/QL50 /Mission50 |
Different Buttons Shapes:
1. Dome / Round button
Used as gauge buttons of DTH bits, suitable for very abrasive and very hard rock formation.
2.Parabolic / Semi-ballistic
Used as gauge buttons and front buttons of DTH Bits, suitable for medium abrasive and hard rock formations.
3. Ballistic button
Used front buttons of DTH bits, suitable for medium abrasive and medium hard formations. Also be used as gauge buttons for soft rock.