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| CUTTING STRUCTURE |
| Chisel on gage, double spherical on inner rows Designed for very soft formations with low compressive strength and high friability such as shale, soft limestone, sandstone, gravel clay, soft dolomite, coal ore. Compressive strength: 6,000-9,000 psi/41-62 MPa |
| SHIRTTAIL PROTECTION |
| Hard welding and wear resistant carbide protection on shirttail lip and lug, anti-reversal insert protection. |
| PRODUCT SPECIFICATION |
| IADC Code: 435 |
| Bearing Type: Roller-Ball-Roller-Thrust Button/Sealed Bearing |
| Circulation Type: Jet Air |
| Cutting Structure: |
| Inner and Nose Rows: Double spherical |
| Gage Bevel Protection: Ovoid |
| Pin Connection: 6 5/8″ API REG |
| Metric Bit Diameter: 251 mm |
| Product Weight: 143 lbs/ 65 kg |
| OPERATING SUGGESTIONS |
| Weight on Bit: 9,875-39,500 lbs/ 4.5-17.9 T |
| Rotational Speed: 90-120 rpm |
| Air Back Pressure: 29-58 psi/0.2-0.4 MPa |
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