Solitary ring system for down the hole hammer
DTH SR products are economical and cost-effective to use when the ground is homogenous with few small boulders. With the same pilot you can install piles and interlocked Pipe-Pile-Wall piles just by using ring bits with different outside diameters. Robit® Solitary Ring Casing Systems are available for all the common Down The Hole hammers and can be used for all applications where the casing is left in the ground.
| Casing OD (mm) | 273 |
| Casing OD (in.) | 10 ¾ |
| Casing Max Wall (mm) | 12,7 |
| Casing Max Wall (in.) | 0.500 |
| Ring bit ID (mm) | 194,0 |
| Ring bit ID (in.) | 7.638 |
| Ring bit OD (mm) | 327,0 |
| Ring bit OD (in.) | 12.874 |
| Pilot bit OD (mm) | 244,6 |
| Pilot bit OD (in.) | 9.630 |
| Hammer | 8" |
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