Under reamer is a tool to enlarge the hole size in drilling operation and save the trip times,this under reamer is mechanically expandable,so it can expediently control the cutters to expand and shrink when drilling.It has the advantages of ingenious structure,convenient control and flexible action features.
| Model | Ream Range | ID | OAL | Connection |
| inch | mm(inch) | mm(ft) | ||
| UR-II 184 | 8-1/4～13 | 44.5(1-3/4) | 2418(7.9) | 4-1/2REG P×B |
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