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| Bit type | Hole Opener |
|---|---|
| Diameter (mm) | 350 mm |
| Diameter (inch) | 13.78″ |
| Bearing | Open bearing |
| IADC code | 543 |
| Thread connection | 3 1/2 API Reg |
| Manufacturer | NRB |
Dimensions are nominal. Tolerances follow the manufacturer’s specification.
Fill in what you already know — diameter, formation and connection are enough for us to quote.
311.1 mm12 1/4″
IADC 543 · Open bearing
NRB
In stock250.8 mm9 7/8″
IADC 135 · Sealed bearing
NRB
In stock244.5 mm9 5/8″
IADC 213 · Open bearing
NRB
In stock241.3 mm9 1/2″
IADC 231 · Open bearing
NRB