Changsha Tianhe Drilling Tools and Machinery Co.,Ltd.
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Gold 20inch big DTH drilling tools with DTH hammer for foundation drilling
1,Structue for 20inch DTH hammer for foundation and water well drilling:
| ITERM DESCRIPTION | ||||
| NO | PART LIST | |||
| 1 | TOP SUB | 475230 | PRODUCT NAME | NUMA180 |
| 2 | STEEL PAD RING | 475030 | PRODUCT CODE | 475002 |
| 3 | O RING | 355*7 | BIT TYPE | NUMA180 WITH FOOT VALVE |
| 4 | CHECK VALVE | 475020 | THREAD CONNECTION | HEX |
| 5 | SRPING | 172*51*5*15 | WORKING PRESSURE (BAR) | 14-24 |
| 6 | ADJUSTING PAD | 475060 | AIR CONSUMPTION 24BAR (M3/MIN) | 78.8 |
| 7 | BELLEVILLE SPRING | 263*199.6*10.6 | RECONMENDED ROTATION SPEED | 30-40 |
| 8 | CHECK VALVE GUIDE | 475070-C | OUTSIDE DIA (MM) | 406 |
| 9 | FEED TUBE GUIDE | 475100 | LENGTH WITH OUT BITS | 2425 |
| 10 | O RING | 300*7 | WEIGHT | 1530 |
| 11 | PRESSURE BEARING WAHSER | 175*152*18.5 | NORMAL AXIAL PRESUURE (KN) | 25 |
| 12 | O RING | 132*5.3 | REC HOLE SIZE(MM) | 500-700 |
| 13 | FEED TUBE | 475120-C | ||
| 14 | PISTON | 475130 | ||
| 15 | OUTER CYLINDER | 475140 | ||
| 16 | CHUCK RING | 475150 | ||
| 17 | STEEL PAD RING | 475170 | ||
| 18 | CHUCK SLEEVE | 475160 | ||