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 |
|---|---|---|---|---|
| 78.5 kg | 10 m3min-1 | 15 m3min-1 | 13 Hz | 20 Hz |
| Oper. air pressure | Hammer Outside Diameter | Length | Backhead Spanner Flat Size | Drill Bit Shank Type |
|---|---|---|---|---|
| 0,6 - 1,8 MPa | 142 mm | 1022 mm | 95 mm | QL 60 |
| Bore Hole Diameter | Piston Weight | Wear Sleeve Discard Limit | Connecting thread (inner) | Ordering code |
|---|---|---|---|---|
| 159 - 205 mm | 17.7 kg | 135 | 3 1/2” A.P.I Reg box | 9550-310 |
| 01 | 4342-672 | Cylinder |
| 02 | 2361-170 | Retaining ring |
| 03 | 273 087 | O-Ring |
| 04 | 2148-311 | Bit chuck |
| 05* | 5009-290* | Piston* |
| 06 | 3093-250 | Piston guide |
| 07 | 273 052 | O-Ring |
| 08 | 273 053 | O-Ring |
| 9* | 5097-311* | Threaded backhead* |
| 10 | 2023-391 | Valve bushing |
| 11 | 4325-320 | Valve tube |
| 12 | 315 037 | Spring |
| 13 | 2007-130 | Ring |
| 14* | 0901-930* | Valve dart* |
| 15 | 2007-160 | Spacing Tube |
| 16 | 273 409 | Rubber ring |
| 17 | 5100-121 | Threaded backhead assy. |
| 18 | 5009-300 | Piston assembly |
| 19 | 8140-030 | Valve dart assembly |
| - | * | Only sold as part of assembly |
