VKP Down-The-Hole hammer is designed for drilling deep holes in low to high strength materials, particularly for blasting operations in quarries. Maximum depth of a borehole is determined by the potential of the drilling rig and, critically, the ability to flush out bore dust which changes with the material drilled, diameter of the hole, operating air pressure and drill bit used. The hammer can drill in saturated borehole environments as well as completely underwater. With foam or water flushing, the hammer may also be used in enclosed areas like underground mines
| Weight | Air consumption 0,6 MPa | Air consumption 1,2 MPa | Impact frequency 0,6MPa | Impact frequency 1,2MPa |
|---|---|---|---|---|
| 59.5 kg | 3,5 m3min-1 | 8,6 m3min-1 | 18,2 Hz | 23 Hz |
| Oper. air pressure | Hammer Outside Diameter | Length | Backhead Spanner Flat Size | Drill Bit Shank Type |
|---|---|---|---|---|
| 0,6 - 1,8 MPa | 125 mm | 1010 mm | 95 mm | DHD 350R |
| Bore Hole Diameter | Piston Weight | Wear Sleeve Discard Limit | Connecting thread (inner) | Ordering code |
|---|---|---|---|---|
| 145 – 165 mm | 11.5 kg | 116 | 3 1/2” A.P.I Reg box | 9550-360 |
| 01 | 4342-720 | Cylinder |
| 02 | 2361-150 | Retaining ring |
| 03 | 273 113 | O-Ring |
| 04 | 2148-320 | Bit chuck |
| 05 | 5009 261 | Piston assembly |
| 06* | 5009-251* | Piston* |
| 07 | 3093-230 | Piston guide |
| 08 | 5100-130 | Threaded backhead assy. |
| 09 | 273 113 | O-Ring |
| 10* | 5097-390* | Threaded backhead* |
| 11 | 2023-380 | Valve bushing |
| 12 | 4325-260 | Valve tube |
| 13 | 315 037 | Spring |
| 14 | 8140-030 | Valve dart assembly |
| 15 | 2007-130 | Ring |
| 16* | 0901 930* | Valve dart* |
| 17 | 2007-160 | Spacing Tube |
| 18 | 273 409 | Rubber ring |
| 19 | 273 442 | O-Ring |
| - | * | Only sold as part of assembly |
