API 7 1/2" 190.5mm Hard Rock Water Well Drilling Bits
* This Series Tricone Bit Diameter from 3 7/8" to 36 inch, IADC Code from 117 to 137.
* Bearing : Rubber (O-Ring )Sealed Journal Bearing Bit
| Product Name | API 7 1/2" Tricone Drill Bit Water Well Drilling Bit |
| Model | 7 1/2" HA617GY |
| Product Standard | API Spec. 7-1 |
| Pin Thread | API Reg. 4 1/2" |
| Sealed Bearing | O-Ring Sealed Journal Bearing |
| Normal WOB | 0.70~1.20 KN/MM (Bit Diameter) |
| Gross / Net Weight | 32 / 35 Kgs |
| Packing Size | 250X250X400 mm |
| Rotary Speed | 70~40 RPM |
| | Large radius scoop compacts in inner row,spherical compacts in outer row,and a row of trimmers is added between gage row and heel row. |
| Drilling Formation | Medium hard with high compressive strength and high abrasiveness,such as limestone,dolomite,sandstone and chert,etc. |
