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 | Air consumption 1,8 MPa | Impact frequency 0,6MPa |
|---|---|---|---|---|
| 10.5 kg | 1,8 m3min-1 | 3,7 m3min-1 | 7,8 m3min-1 | 27 Hz |
| Impact frequency 1,2MPa | Impact frequency 1,8MPa | Oper. air pressure | Hammer Outside Diameter | Length |
|---|---|---|---|---|
| 34 Hz | 44 Hz | 0,6 – 1,8 MPa | 62 mm | 670 mm |
| Backhead Spanner Flat Size | Drill Bit Shank Type | Bore Hole Diameter | Piston Weight | Connecting thread (inner) |
|---|---|---|---|---|
| 50 mm | PERMON70 | 75 – 80 mm | 2 kg | Rd 50 Female |
| Ordering code |
|---|
| 9550-250 |
| 01 | 4342 620 | Cylinder |
| 02 | 2361 140 | Retaining ring |
| 03 | 273 067 | O-Ring |
| 04 | 2148 270 | Bit chuck |
| 05* | 5009 230* | Piston* |
| 06 | 3093 220 | Piston guide |
| 07 | 273 069 | O-Ring 42 x 2 |
| 07 | 273 075 | O-Ring 45 x 2 |
| 08* | 5097 160* | Threaded backhead* |
| 09 | 2023 370 | Valve bushing |
| 10 | 4325 250 | Valve tube |
| 11 | 315 037 | Spring |
| 12 | 2007 130 | Ring |
| 13* | 0901 760* | Valve dart* |
| 14 | 273 408 | Rubber ring |
| 15 | 8140 010 | Valve dart assembly |
| 16 | 5100 090 | Threaded backhead assy. |
| 17 | 5009 240 | Piston assembly |
| - | 722 027 | Plastic foot valve |
| - | * | Only sold as part of assembly |
