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.
| Weight | Air consumption 0,6 MPa | Air consumption 1,2 MPa | Air consumption 1,8 MPa | Impact frequency 0,6MPa |
|---|---|---|---|---|
| 22.7 kg | 2,5 m3min-1 | 6 m3min-1 | 9 m3min-1 | 22 Hz |
| Impact frequency 1,2MPa | Impact frequency 1,8MPa | Oper. air pressure | Hammer Outside Diameter | Length |
|---|---|---|---|---|
| 27 Hz | 32 Hz | 0,6 - 1,8 MPa | 81 mm | 839 mm |
| Backhead Spanner Flat Size | Drill Bit Shank Type | Bore Hole Diameter | Piston Weight | Wear Sleeve Discard Limit |
|---|---|---|---|---|
| 65 mm | DHD 3,5 | 95 – 105 mm | 4.9 kg | 78 |
| Connecting thread (inner) | Ordering code |
|---|---|
| 2 3/8” A.P.I Reg box | 9550-330 |
| 01 | 4342-680 | Cylinder |
| 02 | 2361-510 | Retaining ring |
| 03 | 273 109 | O-Ring |
| 04 | 2148-200 | Bit chuck |
| 05 | 5009-310 | Piston |
| 06 | 3093-260 | Air guide |
| 07 | 273 068 | O-Ring |
| 08 | 5097-340 | Threaded backhead |
| 09 | 3093-270 | Lantern |
| 10 | 315 037 | Spring |
| 11 | 273 056 | Cuff Sealing |
| 12 | 2007-130 | Ring |
| 13 | 0901-990 | Valve dart |
| 14 | 2007-190 | Spacing Tube |
| 15 | 273 408 | Rubber ring |
| 16 | 273 007 | Rubber ring |
| 17 | 273 057 | O-Ring |
